Wednesday, November 16, 2011

Ready the Band Saw for Wood Turning


After the wood lathe itself, one of the most used tools in the woodturning workshop is the band saw. For many woodturners, after the lathe and the grinder have been bought and set up, the band saw is the next purchase for large machinery. A few simple steps make it a better tool for woodturners and other woodworkers.
Like many woodworking machines, the band saw needs to be set up and periodically tuned for safe and accurate use. Most such machines in the home shop are typically two wheel saws, fourteen inches in diameter. The size refers to the diameter of the wheels and not to the depth of cut which will likely be in the six inch range.
Those wheels will look much like bicycle tires with rubber rims. While they will of course be clean in a new saw, as the tool is used the tires need periodically to be brushed clean of dust which will cake on to them especially from green softwoods. They also need to be properly lined up.
This means they need to be parallel to one another and running coplanar. There should be a means to adjust the distance of the free running wheel, that is, the one not powered by the motor. While this may be form shims, set screws or some other method, it should be noted in the instructions from the saw. A straight edge spanning both wheels, placed immediately before the axles, should touch the top and bottom rims of both the top and bottom wheels simultaneously for the wheels to be coplanar and parallel.
Once this is done, the blade should run at the center of both wheels. There will be an adjusting knob to track the blade. With the saw unplugged rotate the wheels by hand and adjust to track in the middle. Tighten the blade so it can be moved a quarter of an inch at center or follow the instructions with your saw. Each blade will need to be tracked and tensioned when it is installed and may need periodic adjustment during use.
A band saw is useful for wood preparation both for small projects and for large. For small, finer cuts a one quarter inch six tooth blade is a good one to start with for general use and wood up to a couple of inches thick. Heavier green wood for bowls and the like will require a three eighths three point blade or something similar. Like all saws, blades need to be kept sharp and clean for good use. Having a couple of extras on hand is a good idea.
Band saws are versatile for straight or curved cuts and a valuable asset for the woodturner. They are easy to set up and use as well as being one of the safest cutting tools in the shop.

Tuesday, October 18, 2011

Choosing A Wood Lathe: What To Look For When Sturdy Counts


While it is obvious that wood lathes spin wood around, it is not always obvious to the first time buyer that spinning wood, if out of balance, vibrates tremendously. In addition, wood lathes may be asked to spin very heavy sections of wood and need to be able to withstand considerable force. There are a couple of simple things to look for to ensure that a lathe is sturdy enough for the work at hand.
If you have a small shop and intend to turn small objects, it may seem as if sturdiness will not be a factor, but this is simply not so. Most small lathes turn at high speeds and have a very high minimum speed. Just as on a car, an unbalanced wheel does not seem a problem at low speeds but vibrates at high ones, the same thing happens on a lathe with unbalanced wood or with unbalanced lathe parts. While a small piece on a small lathe may not try to walk across the floor, vibration encourages poor cuts and difficulty in a good finish.
Larger lathes tend to have lower minimum speeds and thus allow for less vibration in unbalanced pieces. However they also are generally bought with the purpose of handling larger pieces of wood and thus more weight. A bowl blank of forty pounds is not unusual on a lathe with a twelve to sixteen inch swing and can literally walk a light lathe across the floor of the shop.
The solution to the problem is to have a lathe sturdy enough to handle the work. It starts with a good foundation such as a stand that is well made and heavy enough to not move under the forces of turning. Sand is a good vibration absorber and many turners design their lathe stands to hold hundred of pounds of sand.
The lathe itself should have lots of cast iron and steel in its construction. Stamped metal parts tend to give little support. Good welds should be looked for. Check with your woodturning friends and find out what lathes they use for the type of turning you intend to do and then find out if they are satisfied. Good bearings are a must and even more important are the bearing housings. Bearings are easily replaced but not where they live in the lathe.
One of the best tests of sturdiness is common sense when looking at the lathe. If it looks solid it likely is. This would not be just a catalogue look but rather a chance to stand at it and see if the steel is substantial and the iron castings are solid and well finished. The mechanisms to hold the headstock, tailstock and tool rest should be strong and lock firmly. Speed controls should move easily and switches readily accessible.
The final test of the lathe will happen as you turn on it. Many turners will push the envelope of size and speed and safety is each individual's responsibility but much of it can be ensured with good planning and a little foresight.

Friday, October 07, 2011

Mounting Wood On The Wood Lathe: Do Not Forget The Jacob's Chuck


   One of the best and worst things to happen to modern woodturning is the invention of the four jaw chuck for holding wood. While it is a great addition to the woodturner's asenal, it is also an expensive tool and many beginners find that it costs more than their wood lathe. Also, like many tools a cheaper version is aggravating and in some cases simply dangerous to use. One thing to remember is woodturning has been around for thousands of years and there are many ways to mount the wood without the newest fashions. The Jacob's chuck is a great tool for all turners.
   A Jacob's chuck is designed for holding drill bits. It is the chuck on the end of the drill press or the electric hand drill. As such it is often used held in the tail stock of the lathe to hold a drill bit for putting a hole in a piece of wood in the head stock or vice versa. However, it may also be used to hold a piece of wood for turning.
   The difficulties in using a Jacob's chuck for holding wood are
  1. its size which is generally limited to one half inch although slightly smaller or larger ones are available for some lathes
  2. its having three jaws which make it awkward to hold onto a square piece of wood
  3. it is made for holding metal and may well crush the wood in its jaws
These limitations are easily dealt with.
   The time to use a Jacob's chuck is generally to turn a spindle that needs to be held on one end only. This means that the stronger grain orientation of long grain is being used as opposed to face grain. In such circumstances a piece of one half inch wood such as maple is easily strong enough to support a three inch spindle of reasonable length. It remains to mount the spindle first between centers and turn it round, allowing for a short length at one end to be turned down to one half inch so as to fit in the chuck. Now it can be remounted in the chuck, trued up and finish turned.
   Note that this also removes the second difficulty of trying to fit a square piece of wood into a three jaw structure. The tenon to fit the chuck is now round. It also deals with the third problem of crushing the wood. This would serve to mar the wood and also to move the piece off center for turning. A truing cut will put it back on center and the tenon is considered waste wood and removed from the finished piece.
   The old and established technology of the Jacob's chuck is not as versatile as the newer four jaw chuck but it is reliable at a much lower cost and opens new avenues of wood turning to the beginner without a lot of expenditure. Besides which, a Jacob's chuck is a welcome addition to every turner's arsenal.

Thursday, September 22, 2011

Five Glues For Woodturners – Answering Three Different Needs


   The hardware and speciality stores abound with adhesives of all sorts these days. Confusion can easily beset the woodturner buyer unless the needs are known for the glues. Thankfully four different and readily accessible glues are all that is needed for ninety-nine percent of woodturning requirements.
    First of all is the typical woodworker's glue or aliphatic resin emulsion which most call carpenter's glue or yellow glue. It is similar to polyvinyl acetate or white glue but has a better tacky quality and less initial slippage. Both dry to a bond that is stronger than most woods, at least when applied to side grain. It is often used to attach a waste block to faceplate turnings and may have paper separating the waste block and the turning wood. In addition, it is a good glue to use building up segmented turnings.
    Second is another standby of many wood shops, epoxy resin glues. This is a two part adhesive that is great for attaching handles or any situation where it is necessary to adhere metal to wood. It will also allow the joining together of damp woods while most other adhesives require the wood to be dry.
    Third is cyanoacrylate adhesives or “super glues” commonly called CA glue. These have become the standard of many woodturners. Thin or watery CA is used to fill cracks in burls and other woods while the medium can be used to attach waste wood to faceplate turning even on end grain or wet wood. Thick CA can be used to fill voids in woods that might otherwise be thrown away.
     The rise in the popularity of turning wooden pens has brought polyurethane glues to a similar popularity. While some pen turners use CA to attach the brass sleeves to the wooden pen blanks, others find the gap filling ability of the polyurethane glues along with their great strength to be valuable in turning pens and similar projects. It should be noted that the foam of polyurethane glues which serves to fill the gaps has very little strength but the the strength of the bond where two materials meet is exceptional.
    One of the least used or understood glues in the woodturner's possible arsenal is hot glue from a hot glue gun such as the crafters use. It can used to quickly make temporary jigs as well as to hold waste blocks to faceplate turnings. One should use the high heat and not the low heat glues.
    A little common sense in the use of five types of glues should make the use of each of them reasonable and valuable to woodturners. Each has its place to play in the workshop.

Wednesday, August 17, 2011

Choosing A Wood Lathe: Accessories Can Make All The Difference


   Buying a wood lathe is different than purchasing almost any other stationary power tool. Most come ready to use right out of the box or with only a bit of assembly such as mounting the enclosed blade. Wood lathes generally come without cutting tools of any kind. All that come with the lathe are a faceplate and a couple of centers for mounting wood. However, tools and accessories are readily available and are either needed for turning or will add tremendously to the enjoyment. Still, it is necessary to make sure the desired accessories fit your lathe as it is definitely not a one size fits all proposition.
   A good beginner's set of tools will meet most of the needs of beginning and intermediate spindle turners. Generally a bowl gouge or an Oland tool must be purchased or made for spindle turning. Ensure that the tools are high speed steel and have comfortable handles. While a small set of tools makes it hard to turn large objects and a big set makes it hard to turn small ones, a medium sized set with shafts about seven inches long are commonly used for all sorts of sizes of turnings.
   The typical shop grinder is easily turned into a sharpening station with a couple of aluminium oxide wheels and a sharpening jig. While some experienced turners disdain the sharpening jigs, others love them and they make life much nicer for beginners.
   Accessories will include more centers and faceplates as well as various chucks and gadgets. Manufacturers have long ago noticed the buying power of wood turners and the near addiction to acquiring tools expressed by many. It is necessary to know some things about your lathe before buying.
   Generally accessories will attach to the headstock or tailstock. Headstocks come in a variety of sizes expressed in terms of their diameter and screw size expressed as teeth per inch or tpi. Common sizes for beginner length are one inch diameter by eight teeth per inch and three quarter inch diameter by sixteen teeth per inch. Accessories are easily available for both but may not be for some other sizes. In the UK metric sizes may be more prevalent.
   Tailstocks and headstocks will generally be bored through and then tapered, usually to a standard called the Morse taper. This will generally be a number one or number two Morse taper expressed as #1 or #2. The two are not interchangable but most accessories will be available in either size. These have been the industry standard for some time. Number three Morse tapers have been used on metal lathes for a long time and are being found more often on some of the larger wood lathes for sale.
   It should be noted that having a set of accessories that meet the accepted industry standards allow them to be moved on to new lathes. A good place to start is a beginner lathe with a one inch by eight tooth per inch headstock and number two Morse tapers in the headstock and tailstock. Such standards can have a woodturner looking at the after market accessories for a long time to come.

Saturday, July 30, 2011

How to Make Money With Your Wood Turning Skills


As woodturning continues from beginner to more advanced levels for the enthusiast the question sometimes arises as to how to make money with these wood turning skills. For many hobbyists the dream is to make the enjoyment a money maker, perhaps to the point of it becoming a full time occupation. Here are few things to keep in mind.
First there is the reality of knowing the difference between making money and making a living. Woodturning is a very competitive business and most woodturners who are able to do so for a living have either a long experience at the trade with a great reputation, do a lot of teaching, or have a spouse with a great paying job. It is very difficult to turn full time and have a reasonable income.
On the other hand there are some great avenues for making money as a hobby turner. It is important to be faithful to the art and craft of woodturning and to realize that if you are going to sell what you make, you should price according to the value placed by full time competitors. They are trying to make a living and underselling them is not fair. Besides, if your work is not good enough to compete, it is not fair either to the art and craft to sell inferior work. If you are able to sell at a fair price, chances are the hobby will at least pay for itself and these days that is not bad at all.
Decide what products you are going to sell and ask yourself if you are willing to make them. If your enthusiasm is to turn one of a kind artistic items you will find it to be a high end market that competes with ceramics, painting, photographs and a host of other artistic work. Most woodturners who are able to make money at the craft do so by turning multiples of small items such as pens or kitchenware. Salad bowls by the carload may earn enough money to allow the turning of a few artistic items to keep the interest up.
Craft shows now abound and are a good place to sell woodturnings. If work is displayed professionally and you enjoy working with the public you can have a great time at a show and sell well. Make sure your turnings fit the show and decide to enjoy the experience.
Teaching is another way to expand the income from turning. It is one of the fastest growing area of woodworking today and people are looking for instruction. For a bit of experience show a friend or two something about your way to turn wood and determine if teaching is for you.
While some people do sell work on the internet it will probably be small items turned in multiples once again. Most artistic items will sell only if they are held and fondled first. Wood is a very tactile item in its turned form and folks want to touch before buying.
As in most cases, selling woodturnings is a case of the right price at the right time in the right place. However people have been selling turnings for a long time and it may be the right time for you to start.

Thursday, June 23, 2011

Five Tips for Sharpening Your Wood Turning Tools


One of the first things that woodturners realize, especially if they come to woodturning from other types of woodworking, is turning tools need to be sharpened early and often. In most cases they need to be sharpened a lot more often than other cutting tools and the skills needed are different than those to sharpen most other tools. Here are five tips to help get sharp tools quickly and easily for the wood lathe.
First of all there is the need to recognize a couple of angles, thirty and forty five degrees. Almost all cutting woodturning tools will use these angles and the few that do not will be glaringly obvious. Gouges and skews cut wood. Roughing gouges and bowl gouges are generally sharpened to forty five degrees and straight across. Many woodturners start with spindle turning and spindle gouges are sharpened at thirty degrees. Some turners try to sharpen roughing and bowl gouges to that same thirty with terrible results and are amazed when someone shows them the magic of forty-five.
Second is the need to keep things simple, especially at first. Stick to what has worked for centuries. Woodturning is over three thousand years old and most of what is done is tried and true. This is not to say that there have not been changes but it is good to start with the established norms before branching out. For instance, there is the other typically used grind for a bowl gouge that has long wings and a bevel that alters from about forty five at the edges to seventy in the center. A straight forty-five works beautifully and is a lot easier to do at first.
Then there is the sharpening of scrapers which are the real exception to what appears to be a sharp edge. They are sharpened almost square at about seventy to eighty degrees and the burr that is raised is the cutting area. It is quickly broken away and resharpening is needed often.
This brings up the fourth tip and that is to be satisfied with an edge that is sharp enough to remove wood and still hold up to the punishment of woodturning. For this a grinder is the best tool to use as a sharpening station. Equip it with an eighty grit aluminum oxide wheel and ignore the usual whet stones and honing strops. It can take a lot of time to get a razor edge that will disappear in the first second of turning.
Fourth, use a jig. Freehand sharpening is an art and craft in its own right and it is easier to learn to turn with sharp tools from a jig rather than trying to learn both crafts at once. Jigs will also teach the movements that are needed for freehand turning if the need arises. They can be either cheaply made in the home shop or purchased from just about any woodturning supplier.
Fifth and perhaps most important is to relax and take it easy in the sharpening. It is a part of the turning process and meant to be enjoyed. If an edge comes out wrong it is a simple matter to try again. A little time, a little attention and a little steel and back to the wood again.
Sharpening is not hard and woodturners have been getting a sufficient edge for over three thousand years. With a little practice you will be joining the group and the shavings will fly from a good, sharp edge.

Friday, June 03, 2011

Choosing A Wood Lathe: Make Sure The Tool Fits The Shop


  Wood lathes are generally substantial tools that are going to be part of a general woodworking shop. As such, some consideration needs to be given to ensure that they fit the shop well. At least three areas need to be looked at, namely the type of the shop, the size of the workshop and the woodturner concerned.
  Woodworking shops come in a variety of shapes, sizes, and characters. Either form the beginning or over time they develop a personality depending on the work that is done in them. As woodturning either develops in them or is introduced, they ten to fit three large groups. One is the furniture shop, another an all purpose wood shop, and finally the dedicated woodturning centre.
  For the furniture shop, a wood lathe will likely be used to turn both small items such as speciality door knobs and larger items such as table legs. A typical lathe for this shop would be one that can turn a twelve inch diameter spindle up to thirty eight inches long. It needs to be remembered that small items such as those door knobs can be turned on a large lathe but a large item can not be turned on a small lathe. The capacity to make a sturdy bench for the lathe is inherent in a furniture shop and it can be produced to hold a lot of the tools and accessories needed for turning wood.
  The all purpose wood shop will likely want a similar lathe to the furniture shop but may want it to be able to turn larger pieces. Many of today's lathes allow for the headstock to swing and handle large pieces for outboard faceplate work. If this is desired, it is a good idea to get a lathe that will have a minimum speed of four hundred revolutions per minute or even lower to reduce vibration.
  The dedicated woodturning centre will need at least the second type of lathe and may be better served with a family of lathes that allow for various work to be going on at various times. One lathe may be dedicated to spindle work while another without ways is designed for faceplate work alone. Still another mini lathe may be available for small work at high speeds.
  With these considerations comes the need for the lathe or lathes to fit the shop. Not only does a larger lathe require more floorspace for its footprint, it also needs a fair amount of room around it for the woodturner to move in safety while turning. It will also need to fit itself around the other tools to give a good feel to the shop work flow.
  Finally, every woodturner will develop his or her own style and desire of woodturning. While the first lathe will seldom truly reflect this except by chance, the second and subsequent lathes can be chosen to make the preferred choices in wood turning more enjoyable and perhaps safer as well.
  Wood lathes are tools that tend to be a part of the woodworking shop for a long time and due consideration should be given to their purchase. It is an opportunity for reflection on our craft and in itself can be an enjoyable part of the process.

Thursday, May 19, 2011

Power Drills In The Woodturning Workshop: From Holes To Sanding


Over the years, the hand held electric drill has become a mainstay of the general woodworking shop. Recent developments have made it into a drill, screwdriver, not driver, and sander. Such a versatile tool well deserves to be in the woodturner's arsenal.
While drills are available in sizes from one quarter inch to one half inch depending on the maximum diameter drill bit they can mount, the three eighths hand drill is the most common size sold and meets all the demands of most woodturners.
Obviously, the drill can be used to drill holes of various sizes. Simple and inexpensive jigs are available to allow it to be used as a bench model drill press although the costs of small bench model drill presses allow most shops to have have both types in use. As such they are stable and accurate enough to drill pen blanks and small projects for use of mandrels and other holding devices.
One of the great uses for power drills has become their ability to serve as screw drivers and nut drivers. This is extremely handy when mounting faceplates to bowl blanks and similar work. Screws with wide centers and deep threads are needed and require a fair amount of torques to drive them. Number fourteen self tapping sheet metal screws work well. If they are obtained with a Phillips or Robertson head an appropriate driver bit in the electric drill makes fast work of the process. It is a good idea to have one of the modern drills with adjustable tension on the chuck so that the drill stops driving once the screw is seated. Pilot holes may not be needed in green wood but if they are in dry hardwood, the drill is handy for that use as well. Some of the screws come with hexagonal heads and the appropriate driver serves well for them.
Many woodturners use a four jaw chuck and have various size jaws for different purposes. While it would be good to have a different chuck for each size jaw, the costs often prohibit this. With the appropriate type of bit for the electric drill to fit the screws holding the jaws, it makes the removal and replacement of them quick and easy.
Sanding is not the favorite chore of most woodturners. Bowls and other faceplate items have large areas to sand and the grain tends to vary making the job harder and longer. A simple sanding pad for the drill allows the sand paper to move in the opposite direction to the wood, making the process go much quicker. This has become such a part of woodturning that appropriately sized disks are readily available from most woodturning and sandpaper suppliers.
While the small, drill powered lathes on the market are viewed as little more than toys by most woodturners, the electric hand drill still has a rjole in the woodturning shop. Most woodturners would do well to have couple at hand.

Monday, May 09, 2011

Simple Chainsaw Bar and Chain Maintenance for the Woodturner


While the chainsaw is a valuable tool for the woodturner it is usually used intermittently. Maintenance is necessary as it is for all tools and can be easily accomplished.
It should be noted that chainsaws are extremely dangerous as tools go and should be treated with respect. Instruction in the use of the saw is necessary before using it and safety is the concern of the user. Protective clothing should be worn along with proper face, ear and eye protection. A well maintained saw is a safer saw.
First of all, examine the bar and chain of the saw. The chain should be sharp with all teeth the same size. Sharpening the chain involves two procedures, filing the teeth and filing the depth gauges. The teeth are easiest to file using the recommended size file and a guide that both holds the file and ensures that it cuts to the right depth. Each tooth should be the same length when finished so if one is duller than the rest and requires more filing, file the other teeth to the same length. One tooth longer than the others tends to pull the bar in its own direction and can cause binding. It is a good idea to touch up the teeth at every filling of gasoline or, if the saw is electric, every couple of hours of use. If the saw hits the ground or something other than wood, consider it dull and sharpen the chain. Some sawyers like to have their chains professionally ground at regular intervals and file in between.
The depth gauges are projections in front of the teeth and prevent the teeth from taking too great a cut and possibly catching and kicking the bar back at the user. If they are too high, on the other hand, the teeth are not able to cut to depth and quickly dull from rubbing the wood. Again, a simple jig from your chainsaw supplier allows for easy measuring and ensuring that each depth gauge is filed to the proper height. Depth gauges should be checked every few chain sharpenings.
The bar should be straight, clean and tight to the saw. There are adjustments for proper tension on the chain and it should be set according to your manufacturer's instructions. Too much tension can lead to over heating and ruining both bar and chain while too little tension can cause the chain to catch and kick the saw at the user or to fling the chain off and cause injury. Generally, all that is involved is tensioning a set screw until the chain moves easily on the bar. The bar is held in place with a couple of nuts that need to be checked every filling or at frequent intervals as the vibration of the saw may cause them to loosen.
One of the most obvious things to check and one that is too often not done is to make sure there is plenty of bar oil in the reservoir. This is different from the oil that is mixed with the gasoline and appropriate oils should be used in either case. Bar oil gets flung off by the movement of the chain but helps greatly in keeping the bar cool and in smooth cutting. Most saws are designed to need the reservoir filled with every filling of gasoline. Woodturners tend not to run a saw long enough to run it dry and may forget to fill the bar oil reservoir.
Routine maintenance should become just that, routine. Once the habit is formed, it ceases to be a chore and instead becomes an enjoyable part of the woodturning practice.

Thursday, April 14, 2011

Basic Equipment You Will Need to Start Woodturning Projects

 While it is easily understood that a wood lathe is needed to begin woodturning projects, there are a few other necessities before starting. Many of these are already found in the typical woodworking shop while others will need to be purchased.

The basic wood lathe comes with one or two faceplates for bowls and other large work; a spur center and tail center for holding spindle projects; and a couple of tool rests for different sized work. No cutting tools are generally supplied with the lathe.
While experienced turners will purchase individual tools, it is advisable for the beginner to get a beginning set. This will contain the necessary tools for spindle work. Usually this will be a roughing gouge, a couple of spindle gouges of different sizes, a couple of skews of different sizes, a couple of scrapers of different sizes and a parting tool. Such a set should be high speed steel, not carbon steel which is cheaper but does not hold an edge very long compared with high speed. Later on bowl and faceplate tools can be purchased or made. If the beginner is anxious to begin turning bowls, a one quarter inch bowl gouge will get them started and different sizes can be purchased later on.
Once the tools are purchased there needs to be a means to sharpen them. Woodworkers new to woodturning will be amazed at how often turning tools need to be sharpened. The usual means to a good edge is a grinder however most shop grinders have wheels too coarse to give a good edge on high speed steel. An aluminum oxide wheel of appropriate size should be purchased. It should be around eighty grit and a wheel dresser to keep it round and clean is really a necessity.
While some turners consider a sharpening jig to be a luxury, for a beginner it is almost a necessity. Sharpening woodturning tools freehand is a skill in its own right if not an art. Learning it at the same time as trying to learn woodturning is difficult and learning to turn with dull tools is almost impossible. A jig should be purchased or made at the very beginning.
One of the things that makes woodturning special is the ability to much of the time sand and finish a project on the lathe. Sandpaper in grits from eighty to two hundred twenty is usually found in the workshop but some turners like to go as high as two thousand grit for some projects. Generally up to three hundred twenty will be fine. Danish oil and similar finishes work well for most woodturnings and again is a typical supply of most shops.
Safety is an important part of any woodworking shop and work around a wood lathe is no exception. A face mask to protect from flying wood is a necessity as is a dust mask to protect the lungs from sanding. Hearing protectors are good to have. Most lathes are fairly quiet but saws, drills, sanders and dust collectors as well as other shop tools can cause hearing problems.
Tools to ready the wood for the lathe will likely be already in the shop. Bandsaws and table saws are often used and a chainsaw is a part of most woodturner's arsenals of tools.
A quick look at a woodturning catalogue will convince any aspiring woodturner that bits and pieces can be acquired for years to come but these should get one started. Certainly a lot of enjoyment are contained in these few simple items.

Wednesday, April 06, 2011

Four Glues For Woodturners – Answering Three Different Needs

    The hardware and speciality stores abound with adhesives of all sorts these days. Confusion can easily beset the woodturner buyer unless the needs are known for the glues. Thankfully four different and readily accessible glues are all that is needed for ninety-nine percent of woodturning requirements.

     First of all is the typical woodworker's glue or aliphatic resin emulsion which most call carpenter's glue or yellow glue. It is similar to polyvinyl acetate or white glue but has a better tacky quality and less initial slippage. Both dry to a bond that is stronger than most woods, at least when applied to side grain. It is often used to attach a waste block to faceplate turnings and may have paper separating the waste block and the turning wood. In addition, it is a good glue to use building up segmented turnings.
     Second is another standby of many wood shops, epoxy resin glues. This is a two part adhesive that is great for attaching handles or any situation where it is necessary to adhere metal to wood. It will also allow the joining together of damp woods while most other adhesives require the wood to be dry.
     Third is cyanoacrylate adhesives or “super glues” commonly called CA glue. These have become the standard of many woodturners. Thin or watery CA is used to fill cracks in burls and other woods while the medium can be used to attach waste wood to faceplate turning even on end grain or wet wood. Thick CA can be used to fill voids in woods that might otherwise be thrown away.
     The rise in the popularity of turning wooden pens has brought polyurethane glues to a similar popularity. While some pen turners use CA to attach the brass sleeves to the wooden pen blanks, others find the gap filling ability of the polyurethane glues along with their great strength to be valuable in turning pens and similar projects. It should be noted that the foam of polyurethane glues which serves to fill the gaps has very little strength but the the strength of the bond where two materials meet is exceptional.
     One of the least used or understood glues in the woodturner's possible arsenal is hot glue from a hot glue gun such as the crafters use. It can used to quickly make temporary jigs as well as to hold waste blocks to faceplate turnings. One should use the high heat and not the low heat glues.
     A little common sense in the use of five types of glues should make the use of each of them reasonable and valuable to woodturners. Each has its place to play in the workshop.

 

Sunday, March 20, 2011

Making Wooden Bowls: Thickness Considerations For The Woodturner

   When making wooden bowls the woodturner enters a world of creation that is thousand of years old. People have been using bowls for a long time and making them just as long. The same design questions that face the potter also face the woodturner. One of these is just how thin or how thick to make the vessel walls. Some questions need to be answered to give some guidlines.

  First of all there is the intended use of the bowl. Is it going to be functional such as a salad bowl or is the intention to be visual as an art piece? Generally, a functional bowl will be thicker so as to give stability and a sense of security. Artistic turnings may be extremely thin to give a sensation of lightness and perhaps an ephemeral quality. On the other hand a different artistic turning may be very thick and heavy to present other feelings and qualities to the beholder.
A third category may be a bowl made to impress and perhaps to impress woodturners in particular. In that case it may be so thin as to allow light to pass through the oiled wood. To make one of these, woodturners hang lights behind the turning piece and thin the bowl to allow an even distribution of light through the walls. It is a good test of skill and a learning experience.
   Functional bowls should have walls that are thin enough to work with the intention of the piece and thick enough to seem right. As a rule of thumb and eighth of an inch of thickness for every inch of diameter seems about right with a bit more for six inches and under and a bit less for bowls over sixteen inches. So an eight inch bowl might be one quarter inch thick while a six inch bowl could be three sixteenths and a sixteen inch bowl, three eighths. Most of the time the best thing to do is not to worry about the exact measurement so much as the look and feel.
   Where the bowl is to be used is also a consideration. Restaurants may have a certain criteria they want followed while a bowl turned for the outdoor deck on a summer night might have walls an inch thick. The popcorn may blow away but the bowl will still be there.
   Most of the time the best thing to do is relax and make the bowl. If the lines look good and the bowl feels right, chances are the design is good. Sometimes all the practise pays off and the bowl looks absolutely fabulous. The hunt make all the turning just that bit more special.

Thursday, March 10, 2011

Mounting Wood On A Lathe: Getting A Square Ready


One of the more common ways for people to come to a wood lathe is a woodworker expanding their skill set by wishing to turn legs for a table. This involves mounting a square length of wood to the lathe. Such a common skill requires only a few tips for success.
Assuming the lengths are truly square it remains to mount them to the lathe so that they are truly centered and secure. This is generally a mounting “between centers.”
There are two centers on a lathe, the head stock center or spur center and the tails stock center or tail center. The spur center has a point in the middle and two or four spurs surrounding it. The point keeps the wood from shifting and the spurs engage the wood so that the head stock can drive it.
Tail centers will be either solid or will have bearings mounted so that the center spins. Such a center is called a live center and is highly recommended. Solid or “dead” centers require a drop of oil from time to time to allow good motion of the wood on them. The mid point of tail centers sticks into the center of the wood and prevents it drifting under the pressure of turning.
The center of each end should be carefully found and marked. While there are various implements on the market for doing so, the easiest system is to hold the wood upright in the bench vise and draw lines between the diagonals. The lines cross at the center. Generally the ends of the square will not be seen as the table will obstruct them so the lines are not an issue. If they become one, sandpaper will quickly fix things.
It is a good idea to take an awl and mark the center with a small indentation. When the centers press into the wood they have a tendency to move a bit to the side so the indentation helps to start them on center.
Some people like to make a small cut along one set of diagonals with a saw so as to give a groove for spur center to settle into. This is not necessary and it is simpler and faster to put the center in place off the lathe and strike it smartly with a mallet to seat it into the wood for a good drive. Once the spur center is in the lathe and in place in the wood, the tail center is brought up and the point is pushed into the center depression in the wood. Next the tail center is locked in place and then the center is snugged up. Now things are ready to turn.
Squares are mounted to the wood lathe for many reasons or projects such as candle sticks, rolling pins, potato mashers and table legs to name only a few. Mounting between centers can look flimsy at first but a few episodes will quickly build confidence and craftsmanship, adding to the great enjoyment of turning wood.

Saturday, March 05, 2011

Chainsaw Use For The Woodturner


   Very quickly, woodturners learn that one of the difficulties of woodturning is the acquiring of wood large enough for faceplate turning. It is both difficult and expensive. However, there is often a good supply of local wood in log form if the means to deal with it are available. A chainsaw makes the handling of logs and their processing into turning blanks readily accessible.
   One of the first things to know about a chainsaw is its danger. A chainsaw is one of if not the most dangerous power tools in the woodworker's arsenal. The working part of the saw is a bar covered with a moving cutting chain that is designed to crosscut through hardwood. As such it will not even pause for flesh. In addition it is a simple matter to catch the tip of the bar in such a manner so as to make the saw kick back or jump at the user with amazing speed and power. With this said, there are many people who use a chainsaw day in and day out without problem. While the risk of using any power tool rests with the user, it is a good idea in this case to get instruction from an experienced user before handling the saw on your own.
   Chainsaws come in a variety of types and sizes but for most woodturners there are some simple considerations to think of when buying. Saws are sized by power and bar length. As a general rule subject to all the dangers of generalities, a sixteen inch bar will be long enough for most turners and twelve will be a little short at some point in the woodturning career. Another general rule is to buy the most powerful motor you can afford. It is easier on the user and the saw assuming the weight is also good for the user.
   The power source will be either electric or gasoline. Gasoline is more convenient outside the shop but there is a danger form carbon monoxide when running an internal combustion engine indoors not to mention the huge noise from the motor. Electric saws require heavy extension cords and in general cut slower than gas saws, but are quieter and get the job done.
   The turner should learn to sharpen and maintain the saw. Chains dull quickly if they hit rocks or nails in the wood and sometimes they touch the ground when cutting logs to length. A chain that hits the ground is dull and needs sharpening. This is not difficult to learn and files for sharpening are cheap. If the saw is kept with the bar oiled and the fuel for a gas saw mixed properly, a routine maintenance check by a good repairman or dealer is all that will be needed for long saw life.
   Chainsaws need not be fearful for the woodturner to use and will make the gaining of bowl blanks and the like much easier. Good instruction can make all the difference in the pleasure added to getting ones own wood for woodturning.

Thursday, February 24, 2011

Choosing A Wood Lathe: Remember The Budget

Buying a wood lathe sounds like a simple proposition. Check the budget, look at the lathes in the budget category, choose the one that seems good and away we go. However, like most things in life, it is not that simple. One of the more difficult things for the beginner or first time buyer, is knowing how to gauge the budget in the first place.
Wood lathes are more individual than many other woodworking tools. While there are certainly many models of tools such as table saws, for example, there are certain features expected in particular price ranges and the saws will be fairly uniform in that range. It is expected that one may purchase one, put it in the work shop, and go to work. The wood lathe is a different proposition.
While most wood lathes in a given price range will generally be similar in quality this is not always so. A mini lathe will usually be better quality than a full size lathe in the same cost bracket, for instance. Two lathes of the same price may have different mechanisms for controlling speeds and overall quality of the lathe with the more expensive speed controller will likely be less than that of the other machine. It is necessary in the budget to question what is wanted in the lathe for weight, quality of construction, type of speed control and size among other things.
All other things being equal among lathes, there is the extra strain on the budget to consider. That table saw will be ready to work right out of the box, but not so for most lathes. The typical wood lathe comes with the basic machine ready to run and with centers and a faceplate to hold the wood, but without tools to cut the wood nor any means to keep them sharp. Again in contrast to the table saw that came with a blade that rarely needs sharpening and then by a professional shop, the lathe comes with no tools and no means to sharpen them even though they will need frequent sharpening. It often comes as a surprise to a beginning wood turner that in some circumstances tools need to be sharpened every couple of minutes.
So the budget will need to stretch to a set of woodturning tools, a grinder and a set of aluminium oxide wheels at the very least, not to mention sundries like sandpaper and finishes. All of these should be allowed for in the budget before shopping for the wood lathe. It should be noted that a decent set of woodturning tools or a four jaw chuck may each be more expensive than a beginner's wood lathe.
It is possible to get started turning wood on a modest budget. Some reasonable planning is necessary but many woodturners have begun on light lathes and used them for many years.

Thursday, February 17, 2011

Sharpening Woodturning Tools: Making Sense Of Grinder Wheels For Sharp Wood Lathe Tools


Getting a good edge on a wood lathe tool is one of the great difficulties for a beginning woodturner and an ongoing concern for intermediates and experts. While the grinder is the tool of choice for woodworkers sharpening tools for wood lathes, getting it set up with the correct wheels can be a confusing challenge. It need not be with a couple of simple steps.

First it is necessary to move in thinking of the grinder as a sharpener. Many people come to woodturning from general woodworking where the grinder is used to remove lots of metal in a hurry so as to grind away nicks and breaks in chisels, plane irons and the like. Water stones and honing implements are used for final edges. Woodturners move from the grinder to the wood. Most shop grinders are not set up for this and the problem is largely the wheels.

Thus the second consideration is to replace the grinder wheels. While it is agreed that since woodturners generally use high speed steel tools they should have aluminium oxide wheels, there is a lot of confusion in the catalogues as to what color wheel to get and what bond to have. The color reflects individual manufacturers attempts to make choosing between grades of their particular wheels and has little to do with other wheels on the market. Consideration then should be given to grit and bond.

The bond of a wheel refers to how friable the material is that holds the aluminium oxide together. More friable bonds allow the material to break away quickly thus leaving a sharp cutting and cooler grinding surface. Unfortunately, the most friable bonds manufacturers recommend for woodturners groove, pit and wear quickly requiring a lot of wheel dressing and expensive replacement. Thankfully, almost any aluminium oxide wheel generally available to the home market is sufficiently friable for good sharpening with good wear so making sense of the friable numbers of bonds is not necessary. Just get a good wheel.

Third is consideration of the grit. While it may encourage argument, a good setup is a fast cutting wheel of about 46 grit on one side of the grinder and a sharpening wheel of eighty to one hundred on the other. With a good jig especially, this will meet all the shaping and sharpening needs of the woodturning shop.

Simply put, a couple of inexpensive aluminium oxide wheels of appropriate grit will give a lot of sharpening satisfaction and help to make a lot of shavings for a long time to come. Keep it simple and keep it fun.

Friday, February 11, 2011

Beginning Woodturning: Four Tips Before You Get Started

As you look at a bewildering display of turned wood objects and an even more bewildering display of woodturning tools, it can quickly get discouraging to consider getting started turning wood at all. However if you look at the wide array of people who turn wood you quickly realizes that woodturning is an accessible hobby for just about anyone. The real question is how to get started. Here are four quick and easy ways to begin the entry into the world of wood turning and working on the wood lathe.

  1.  First take your time. Do not rush out and buy the first lathe you come to just to find out it is not suited for the objects that you would like to make. Read a few books on woodturning. Most libraries have one or two and maybe even a video to watch. It may be for a more advanced turner but will certainly give you some ideas of what you are getting into. Look for the basics such as what tools are needed and what kinds of wood lathes are available. Remember that you are starting out and all the bells that whistles that the pros like are probably not necessary for you.
  2.  Once you get a feel for the basics, consider what you might like to make for your own purposes, be they gifts, table legs for other projects, pens or whatever. Think of what accessories you might need other than the lathe or turning tools. Budgets start to come into play here. You might be able to find specialized books on your choices or even classes at the local community college or school dealing with this particular interest.
  3.  Consider taking a class in woodturning. Many woodworking classes in night school will have a lathe available and may have an instructor that knows how to use the machine. In addition look for a woodturning club in your area. A lot of communities have them and most have a fair number of watchers and even members who do not turn but are considering getting started. As a rule, woodturners like to demonstrate their skills and introduce others to the art and craft.
  4.  Stay safe as you start. Get a face shield and dust mask and use them. Hearing protectors are great too. While most lathes are fairly quiet wood shop tools, most wood turners will use chainsaws, band saws, planers, drills and the like with all the noise they provide. Safe woodworking is by far the most enjoyable.

These simple tips will get you started as you begin the interesting and compelling art and craft of woodturning. Soon you will be giving tips to someone else with the same interest.