Archive for the Category ◊ Tools and Shop ◊

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• Saturday, February 25th, 2012

Moving up the rasp food chain to the hand-cut variety reveals the true capabilities of rasps. These have teeth that are cut (“stitched”) into a polished steel blank by a skilled craftsman using a metal pick and a hammer. The teeth are cut in diagonal rows but the handmade process introduces an important bit of randomness in their placement which creates a tool with control and smoothness in use that is unmatched by machine-made rasps.

It is the feel on the wood and the feedback through the woodworker’s hand which makes these rasps so effective. The teeth cover the surface across the entire width, typically at least 1-1/4″ in a 10″ long model, helping to give a direct sense of where the tool is cutting. Because these tools are used for shaping, their superb sensitivity in the hand is paramount.

There is an increasing number of hand-cut rasps available but I will comment only the Auriou brand which I have used for several years. I use the 10″ #9 and #13, a combination which has been marvelously effective in shaping legs, one of my favorite things to do in the shop. They’re not cheap but have proven well worth the investment. Here are two sources: Lie-Nielsen and TFWW. Here is a close-up of the #9 and #13 teeth. Click to enlarge.

It pays to store rasps so they don’t bang against each other, and keep them clean with the method described here.

Here is a list, not necessarily exhaustive, of other hand cut rasps available. Also, here is a suggestion to Popular Woodworking, Fine Woodworking, and the other woodworking magazines: this would be a good topic review, especially since there is a considerable range of prices. In the meantime, reader comments are welcome.

Another tool that is not a conventional rasp but deserves mention in this discussion is the Iwasaki float (“rasp” in at least one catalog) which is effective for shaping. I like my 8″ x 3/4″ “fine” flat Iwasaki. It is essentially a very sharp float with discontinuous arc-shaped teeth, which make the cutting action smoother. When I’ve tried conventional float files on repeated occasions, I found them grabby, though admittedly this was probably due to my inexperience. Nonetheless, the Iwasaki felt good right away.

The Iwasaki is useful in the late stages of shaping to clean up surfaces, and it can even be used to take a bit off tenon cheeks with good control. They are also available in convex profiles. Here is a close up, click to enlarge.

Rasps seem to be looked down upon by some fine woodworkers as less sophisticated than edge tools for shaping. I disagree. I own and use spokeshaves, specialty planes, and gouges. All of these tools have a role in shaping. An excellent quality rasp allows a skilled craftsman to execute just as much control and sensitivity as any of the edge tools. They work!

Next: Disston handles, some technique, and suggested rasp sets to own.

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• Sunday, February 19th, 2012

Woodworkers are fortunate now to have many more choices in quality rasps than were available in the recent past. Here we will look primarily at the workhorse configuration found in most furniture makers’ shops, a 10-inch half-round (one flat face and convex across the width of the other) 7/8 to 1-1/4 inches wide.

First, let’s dispense with rasps which have their teeth cut by machine in neat rows, sometimes referred to as “wood rasps.” These low-cost hackers should be considered DIY tools unsuited for fine furniture making. The problem is the uniform rows cause too many teeth to catch the wood at the same time and depth, sink in, then come away with an abrupt tearing of the wood. Though this effect can be reduced by angling the rasp and adjusting the stroke, a better solution is to get a better rasp. As an analogy, imagine if raindrops hit you in tight groups of eight, instead of the random scattering of real rain. You get just as wet in both cases, but you would feel intermittent strong impacts in the first case (like uniform rows of teeth), instead of the steady smooth shower of real rain (like quality rasps with irregularly distributed teeth).

Probably the most bang for the buck (about 25 of ’em) of any shaping tool in the shop is an unusually constructed rasp, the Shinto “saw rasp.” These are made from hard hacksaw-like blades melded together in a pattern that presents irregular phalanxes of teeth to the wood. Both sides are flat, one coarse, one medium. I prefer the model without the auxiliary handle which handles much like a regular rasp. It is a fairly rough tool, but the cutting action is surprisingly controlled. There is very little clogging and the tool lasts seemingly forever. I use mine early in the shaping process, and it is a great tool for mockups. This is also a way to save your best rasps from unnecessary wear. I wish the company made a version with the medium cut convex along the length and/or width.

Now let’s look at two brands of machine-made rasps with irregular tooth distribution, a key factor in producing a controlled smooth cut.

The Nicholson #49, and the slightly finer #50 have been old standbys, and, for a long time, about the only alternative to row-toothed rasps. The current crop, according to what I read, is made in Brazil and the quality has gone down. I still use my old USA-made pair and though they are good rasps, they are not what I reach for first. They are barely 7/8″ wide and teeth do not cover the full width. I prefer a rasp 1 1/4″ wide for general shaping. Though surpassed by better options, especially hand-cut rasps, these still might meet your needs at a low price. I don’t fine much difference in action between the #49 and the #50, so you could do well with just one of them. A close-up of the teeth my #49 and #50 (not the current production), click to enlarge:

Corradi “Gold” rasps are lesser known but excellent tools which are different in character from any others I know of. The machine cut teeth are densely packed in a wavy pattern which effectively presents the teeth randomly to the wood, giving a very controlled steady cut that feels almost like coarse sandpaper on a stick. My 10″ x 1-1/4″ #8 and finer #10 leave the least scratches of any rasps I’ve ever used. Not particularly aggressive, they come into play in the later stages of shaping. They tend to clog relatively quickly but clear easily. The Corradis have earned a solid role in my work but, as a matter of personal preference, do not have the special feel and feedback of the top-quality handcut rasps. A close-up of the teeth of the Corradi #8 and #10, click to enlarge:

Coming up: handcut rasps, handles, some technique, and more.

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• Saturday, December 31st, 2011

This installment includes questions from readers about the Shelix cutterhead, choosing a plane for shooting, and building a set of tools and skills. Also, several readers have noticed and asked about the tool cabinet in my shop.

I’ve been looking at the Byrd Shelix and can’t decide if I should get it for my 8″ jointer or my DW735 13″ planer. I can’t afford it for both.

The Shelix for the planer is the better option for almost all shops. Here’s why. The main purpose of the jointer is to produce a flat surface and an edge square to it. It does not really need to produce very good surface quality on the face of the board. The jointed face, even if it has tearout and missed areas, will register on the planer bed as the Shelix makes opposite face flat and parallel with excellent surface quality. Once that is done, the board is flipped over and the jointed face is cleaned up with the Shelix.

Tearout is rarely a significant problem when jointing the edge of the board. Even if there are some defects, they should disappear when the edge is handplaned, such as for an edge joint. Jointer defects can also be ripped away on the table saw after you have ripped the second edge parallel.

A segmented cutterhead is not a bad idea for a jointer, but the point is that it is far more valuable on a thickness planer.

By the way, hand planing to flatten the first face of a board too wide for your jointer is not so hard once it is realized that you do not need a perfect surface. You just need a hit-or-miss surface, however ugly, that registers on the planer bed without rocking. Then do the flip procedure as described above.

I recently bought Tico’s shooting board (the Super Chute 2.0). I didn’t want to buy a dedicated plane for shooting and thought a low-angle #5 would be a good choice. I also have a #4, #7, and a block plane.

A LA #5 would work very well and I think would be the best choice of the planes you have. For a plane for shooting, you want a lot of concentrated mass and a thick bevel-up blade which is supported close to its cutting edge. A #7 BU plane has more mass but may get a bit awkward on a shooting board of that size. A 6″ block plane is too small and light. Even the #4 is too light.

A dedicated heavy miter plane is the best choice if you can afford it, such as the Lie-Nielsen #9, which I use with the “hot dog” handle, or the new beast #51. However, even a bevel-down jack or jointer can be used successfully. Most important, use a very sharp blade. Add shooting to your repertoire and watch your capabilities grow.

A woodworker building his set of tools and skills asks: I’d like to add a new tool to my small collection of chisels, saw, marking gauge, and squares. You suggest buying a jack plane first but I already own a #5 and a small power thickness planer. Should I buy a second plane or a pair of rip and crosscut saws. Also, can you recommend a book for learning the basics of woodworking?

Because the jack plane is so versatile, I suggest that you not buy another plane for your next tool. More planes can come later. Instead, you would probably benefit most from buying saws for joinery. If your next project is a table, using mortise and tenon joinery, get a ripcut tenon saw for the cheeks and a crosscut carcase saw for the shoulders. If your next project is a box, get a ripcut dovetail saw to cut the dovetails and a coping saw to remove most of the waste.
Of course, you will need saws to prepare the stock. You will also need gauges, chisels, and so forth. Do not try to accumulate all the tools at once. It is better to choose a type of project that you would like to build now – stick and board construction such as tables, or case construction such as boxes or chests – and get the tools for that. In time, you will acquire more tools. Buy the best you can afford. It can be very frustrating to outgrow cheaper tools as your skills improve. It is much better to have fewer excellent tools than lots of cheap tools.

Start with manageable projects. A small, simply designed project that is well executed will be more satisfying and more instructive than getting overwhelmed with a project that gets out of control.

I suggest Peter Korn’s book, Woodworking Basics, as a very good place to start.

Regarding my tool cabinet, I will soon post about that. I’ve been using it for 25 years, and, though there are a few things about the dimensions that I would make different, the basic design has served me well.

Dear readers, I thank you for reading and for your questions. May 2012 bring you many happy hours in the shop!

Rob

Category: Tools and Shop  | 4 Comments
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• Sunday, December 11th, 2011

A key question for any woodworker acquiring a basic set of tools is which handplane to buy first. As with all tool questions, the answer depends on the type of work you will do and your available money. Furthermore, these issues always involve a large dose of opinion because there are multiple ways to get jobs done in woodworking. 

For general furniture making, I suggest first get a jack plane. If you have a lot of money and can make a strong commitment to woodworking, go ahead and get a top quality set of these six planes: smoothing, jack, jointer, block, shoulder, and miter. For such a set of Lie-Nielsens, the cost would approach $2000 and, though surely worth it for an avid woodworker, is hardly a likely leap for a novice. Yet, you must start somewhere, and an incremental acquisition of tools, with adjustments based on the work you decide to do, is a reasonable path.

A jack plane is an excellent tool for stock preparation and can perform well, though admittedly not ideal, for smoothing, jointing, and shooting. As an only plane, a smoother would be deficient in truing work, and it would be very awkward to use a jointer for finish smoothing. Later, when you get the full set of planes, the jack will still be very useful. I originally used my Record jack for all those tasks and gradually got more planes. With a full complement of planes, I still use it more than any of the others and I also have a bevel-up jack.

The options are: buy a new Lie-Nielsen or other high quality plane, fix up a high quality vintage plane, fix up a mediocre new or old plane, or make your own wooden plane. With the exception of the first option or two, it is best to get a good aftermarket blade such as a Hock. The edge durability of A2 steel makes it a good choice for a jack. Keep in mind that the potential of a fixer upper will be limited by its inherent qualities such as the frog design, weight of the casting, and the adjustment mechanisms. 

Bevel-down and bevel-up both work. For either, it is helpful to have one or two extra blades sharpened to different angles and cambers to accommodate different work. You can shoot with a BD plane (I did for years) though for this a BU design has the advantage of a heavy blade that is supported very close to its cutting edge. A BU plane makes it easy to change to a blade sharpened to a higher angle for figured woods, but a back bevel can similarly be used on a spare blade for a BD plane. I find BU blades harder to sharpen, primarily because of the wear created in use on the flat side of the blade. To choose for an only plane, I’d go with the BD, but this is my bias. The bigger issues are quality, tool preparation, and skill.

Please don’t buy a block plane as your first plane, as is often recommended! While useful, it is far more limited than the jack. It is a one-handed tool used mostly for chamfering and small trimming work that can often be done with a sanding block. You cannot prepare stock with it, true surfaces and edges, or use it as a smoother. Step up to the big leagues right from the start and get the jack.

Even woodworkers who do almost all machine work will benefit from a jack plane. For most hand-machine blended woodworking, you could do quite well with a jack plane to joint the faces and edges of boards and a portable thickness planer to get the brute work done. Add saws, chisels, marking tools, clamps, sharpening equipment, and, of course, a workbench and you’re in business. Get a bandsaw soon.

Go make something – anything – and enjoy it!

Category: Tools and Shop  | 4 Comments
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• Monday, November 21st, 2011

Here is a practical way to choose the height of the workbench that you are planning to buy or build: First, consider the tasks you will commonly perform at the bench. One height will not be ideal for all of them. So, prioritize them, and then try out heights for the major tasks.

I think this method is better than a formula. The most commonly quoted of these states that the top of the workbench should be at the level of your palm when you stand with your arm straight down with your hand extended forward, or simply at the level of your wrist. That might work for you but it might not. I know it does not work for me.

I dissuade you from using a simple formula because this is a personal matter like many aspects of craft. It is not only your height and arm length, but also your back, neck, eyes, posture, and style of work that come into play. The best way to integrate all these factors is to simply try out different heights. Here’s how.

First consider your tasks. As an example, here is my list.

Very common jobs, at which I often spend a long time: planing, sawing dovetails and tenons (sometimes using an auxiliary vise), chopping joinery (often while seated), shooting, scraping, sanding, and finishing.

Shorter duration or less frequent tasks: marking out, paring, sawing with the bench hook, and assembly.

Machine work at the bench: mortising with the router, Domino and biscuit joinery, and using a benchtop drill press and portable electric drill.

Maybe you do lots of carving or inlay, maybe you do all your joinery with machine jigs and the bench is mostly for fitting and sanding, or maybe you prepare all of your stock by hand, and so forth. Remember too, that workbenches are not saw horses; ripping and crosscutting stock to size with handsaws require much lower support.

The next step is to use a sturdy table, Workmate, or a friend’s workbench along with some clamps, and stack/remove 3/4″ or ½” plywood or MDF on it to create various heights to try out the tasks on your list. Pay attention to:

  • your posture – neck, shoulders, back, core, knees
  • reach
  • range of eyesight
  • how you tire
  • any physical limitations you may have.

Find what feels right for you. Your most common and long duration tasks should govern your final choice of height, along with some accounting for the other tasks.

If you are getting a new bench, you get to choose, of course. However, you can easily raise an existing bench by attaching blocks at the bottom. While lowering a bench is a bigger job, it can be done because you’re a woodworker.

There are other approaches. Adjustable height benches and plans to make your own are available which could be used as a primary or secondary bench. Japanese woodworkers do much of their work on the floor and on an angled heavy beam.

In summary, I suggest forget the formulas and trust yourself. You will, after all, be spending a lot of hopefully happy hours at the bench.

This is what works for me, but who cares, find what works for you!

Category: Tools and Shop  | 2 Comments
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• Thursday, November 03rd, 2011

This is the best shooting board I have ever used. I believe it is probably the best available anywhere. Tico Vogt made it and he can make one for you – the Super Chute 2.0. A shooting board is an extremely useful, almost magical, tool that can greatly elevate your control of woodworking processes. After watching Tico develop and improve his version of this tool, I finally had a chance to use it last week at a Lie-Nielsen Hand Tool Event at the Connecticut Valley School of Woodworking.

That’s Tico in the photos using his Super Chute 2.0.

It was like slicing baloney with a sled on an ice track. Tico showed me the tool’s incredible quality details and nuances that only could come from a seasoned woodworker who knows from experience what really works in the shop. To elaborate on all of them here would make this post too long, but I will point out a few highlights.

The plane rides on a track of super-slick UHMW plastic. Importantly, the work piece sits on an angled bed which facilitates a strong stroke with the plane and distributes wear and cutting resistance over a greater width of the blade than a flat bed would. The 90̊ and instantly-installed 45̊ fences register in eccentric bushings which make their angles micro adjustable. The fences are also laterally adjustable to completely eliminate end grain spelching. To my mind, these user-controlled features respect the skill and intelligence of the craftsman using the tool. A donkey ear miter attachment that installs easily is also available.

Tico uses CNC technology and sources components manufactured with a high degree of sophistication to a produce a product with quality evident throughout. No, it’s not cheap; excellence never is. This is Lie-Nielsen-type quality in a shooting board.

A plane such as L-N’s sweet #9 makes shooting all the more of a pleasure but don’t feel you must have a dedicated miter plane to start shooting. A well-tuned and well-sharpened jack plane, bevel-up or bevel-down, can shoot very effectively. Shooting is a gateway technique, easily learned, that will allow you to produce precise ends on components of casework. It is a must for making precision high-end drawers with hand tools.

This review is unsolicited and uncompensated. I just think the Super Chute 2.0 is a heckuva tool.

Author:
• Tuesday, October 25th, 2011

Using a straightedge is easy, right? Yes, but it does pay to use a technique that is both practical and consistent with the tolerance to which want to work.

Pictured above are, from front to back, a 6″ Bridge City rule, the 18″ beveled Starrett #385, the 24″ unbeveled Starrett #380, and a Lee Valley 50″ aluminum straightedge. The photo below shows the thicknesses, from left to right, of the 6″ rule, a Starrett combination square blade, the #385, and the #380. The Lee Valley is about 7/16″ thick at its base. 

Let’s look at three techniques for using a straightedge and consider some of the related features of different straightedges.

1. Eyes won’t lie

This is the way a straightedge is usually thought to be used. You simply hold the tool against the surface and look for gaps against a light. Done properly, this allows the eye to easily detect gaps of 0.0005″ (half a thou) or less.

It is helpful to use a diffuse, linear background light, such as a fluorescent bulb, and a thin edge against the work, such as a beveled edge. If a wider edge is used, ensure that your line of sight is parallel to the surface. A false impression of accuracy will result if the light under a gap is blocked from view simply because there is an angle between your line of sight and the width of the tool’s edge.

This technique can be awkward and tiring because you have to hold the tool and the work up to the light, or bend and maneuver to view a stationary surface. It is good for testing a plane sole or other small, very precise work. The #385 or an accurate small rule are good choices. Avoid tipping the straightedge which can introduce errors caused by any slight bow of the tool along the length of its face.

2. Shim it, shim it again

Here you lay the straightedge on the surface and use feeler gauges to seek out gaps. Look for hollows near the middle of the tool, but also press down near an end to check for gaps at the opposite end created by a bump somewhere in the middle.

A good way to work to a specific tolerance, say 0.001″ for a plane sole that you are lapping, is to put a leaf gauge under a wide-edged straightedge, and then gently pull the leaf to see if it drags the straightedge or slips through freely. The former indicates you are within tolerance (as long as there was no previous rocking of the straightedge), the later indicates a gap. Decide how large and where you can tolerate errors.

This technique is also handy to test a tablesaw top or jointer bed which you cannot lift and where bending is difficult or impossible to get your line of sight parallel to the surface.

The #380, or any tool with a similar wide edge, is a good choice for this technique.

3. Swing it easy

The first two techniques are slow and almost always overkill for wood preparation. So here’s the quick, easy, practical method that I suggest for dressing stock.

Set the straightedge on the wood, grasp and unweight one end, but do not lift it, and gently swing it along the surface. See where the tool “grips” or pivots. If it pivots just barely at the opposite end, the surface is slightly concave. If it pivots somewhere in the middle, you’ve got a bump. In woodworking, bumps are generally undesirable so you work with a one-sided tolerance, flat or a trace concave. You’ll quickly get the feel of this method.

Here is where a heavy, wide-edged, metal straightedge gives you a nice feel on the wood. The steel Starretts or the big Lee Valley aluminum work well.

This is convenient – no lifting or unclamping the work – and it quickly tells you what you want to know – that one-sided tolerance. It allows you to work in rhythm with your craftsman’s intuition.

In conclusion, the straightedge, while the simplest of tools, requires matching the technique to the task.

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• Thursday, October 20th, 2011

It can be argued that a straightedge is unnecessary. When using a handplane, for example, a woodworker can sense the flatness of a board from the bite of the blade and the shavings produced as the work progresses. As another example, the ultimate test of an edge-to-edge glue joint is how the boards meet each other rather than an external standard. You would, however, mostly have to just trust that your planes’ soles, tablesaw top, jointer beds, and so forth are accurately flat.

As a practical matter, a high quality straightedge is a fundamental reference tool that is very useful in the shop and is easy to acquire. I prefer factory-made metal straightedges, but wooden straightedges can be made in the shop to a very high standard. 

Here’s a simple method:

Start with two pieces of a stable, fine-textured wood such as mahogany or cherry, quartersawn, flat, with straight grain, about 2″ wide, 18″ – 30″ long, and 3/8″ – 1/2″ thick. MDF will also do. Join the two pieces face to face by clamping, or by pinning with nails or dowels that are snug but removable. Bevel a pair of adjacent edges to make each 3/32″ – 1/8″ wide.

Now plane both the thick and the thin pairs of edges as flat as you can. I think the easiest way to accurately plane the edges is to shoot them. Put the plane on its side, clamp the pair of sticks on a flat board with a pair of edges overhanging, and plane away. Uncouple the pieces and check the edges against each other.

You can start off by simply ripping each piece on an accurately set up table saw and then go to the planing steps.

Because two edges are being planed together, they will have the same type of inaccuracy – concave or convex – at the same places. The inaccuracy will be effectively doubled when you place the edges against each other and compare them against a lighted background. [There is no realistic possibility of creating a falsely acceptable result by producing one concave edge which happens to mate with the other edge being symmetrically convex.] Work until you achieve whatever level of accuracy that you think is practical for your work.

You now have made two straightedges AND a pair of winding sticks!

I made the 30″ winding sticks, pictured above, from 3/4″ MDF. Only minimal planing was required to refine tablesawn edges. They’re good to about 0.001″ over their lengths. I use them only as winding sticks, which is another topic for another time.

For straightedges, I like steel and, in some cases, aluminum. A quality metal straightedge, such as a Starrett, is accurate to an extremely high tolerance and has the advantage of durability. I like the weight, contact feel, and affordability of a steel straightedge in lengths up to 24″. For longer ones, aluminum keeps the weight and cost down. Properly cared for, these tools will last a lifetime.

Next: a selection of straightedges and techniques for using them.

Category: Tools and Shop  | 4 Comments