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Showing posts with label atkinson walker. Show all posts
Showing posts with label atkinson walker. Show all posts

Saturday, 14 May 2011

Saw Handle Design

The interface between tool and user is a critical component of tool design and even subtle changes can have a marked effect on how the tool works.

Take this beautiful Thomas Turner tenon saw for example, the grip is reasonably vertical with a pronounced bulge in the back. To understand the reason for this we need to consider the 'hang' of the handle. A tool with a straight handle (like a gents saw or a carving knife) gives a great deal of control. Wafer thin slices of roast beef or finely executed joinery... In contrast a tool with a more vertical handle (like a steel framed bowsaw or a plane) is all about maximum transfer of power.

In this example we have a bit of both but the emphasis is on power. English backsaws can be steered left or right for the first few strokes, after that the kerf, gravity and the set (the amount by which the teeth protrude left and right from the saw plate) take over and do all of the steering for you. To begin the cut with this saw you would grip at the top with your thumb and extended forefinger and relax the rest of your hand to maximise your control.

With the workpiece secured in the vice so that the cut is plumb , all you have to do is feel for the zero moment when the back is directly over the teeth and gradually allow more of the saw's weight rest on the workpiece. With a new saw you have the advantage of being able to observe the reflection of the timber in the side of the saw plate too - if the reflection seems to carry on straight through you know the saw is plumb. With an old one you need to be more conscious of feeling for vertical, the weight of the saw is all in the heavy brass back, making it more 'tippy' so the point of balance should be relatively easy to feel for.

Once the kerf is established you can relax your thumb and forefinger and tighten up a touch with your little finger and the heel of your hand, this changes the grip from the top part of the handle to the bottom part - from control to power. By this stage there is no steering to do, the kerf is holding the spine perpendicular over the teeth, the spine is providing the weight to keep the teeth engaged and the set is ensuring that the left and right teeth are bearing equal measures of the work so the kerf stays straight. The faster you go on the push stroke, the more material you will remove with each pass, and as long as you don't grip too tightly and pull it off course, the cut will continue dead plumb and true.

Whether you are squeezing at the top for control or at the bottom for power, your grip should always be relaxed enough that you can feel the soft flesh of your fingers give a little each time you switch from pull to push, it really is a very light touch indeed.

With sharp teeth and a well balanced set I'd be happy to bet this saw will easily eat half inch oak at a rate of an eighth of an inch with each stroke. A new one with a much thinner plate and harder modern steel would possibly manage double that.

If you fancy having a go at fine tuning your own saw handle shape we have Atkinson Walker tenon and dovetail saws available in kit form with full instructions and downloadable templates. The Pax 1776 range were also designed to be adjusted to suit the individual user, the finish on the handles is just straightforward Danish oil (tung oil) so any alterations you make can be easily blended into the original finish.

Tuesday, 2 November 2010

Saw Handle Instructions

Woodworking saws

Thanks to some very generous assistance from Aiden (The Tiddles) of UK Workshop, we finally have handle plans available for the Atkinson Walker saw kits. Thank you to those who have been waiting for them.

Download saw handle templates here.

A step by step guide how to make your saw handle can be found here.

The guide to sharpening and using your new saw is here.

For an intermediate woodworker, these kits are great fun to make and you end up with a fantastic set of saws that you will enjoy using for many years. They also give you an appreciation of how much work goes into producing top-end handmade saws and perhaps even a few new skills that you can transfer to other projects.

Monday, 21 June 2010

Carpe Diem

Workshop Heaven Special Offers

Amid speculation as to whether the Chancellor of the Exchequer will raise VAT to 20% in tomorrow's budget (Tuesday 22nd of July), we have extended our Father's Day promotion on all British made products until after the announcement. It would be pointless for me to change all the prices and then have to change them again 24 hours later. So if you are thinking about a Clifton Plane, Atkinson Walker Sawblade or some Ashley Iles Chisels, sieze the day!

Tuesday, 29 September 2009

Chop Chop!

industrial saw blade

In accordance with my policy of ‘if I wouldn’t use it in my own workshop then it doesn’t go on the website’, I thought I should treat myself to an Atkinson Walker industrial blade for my mitre saw - and a very satisfying piece of engineering it is too!

The industrial blades are all heat treated at the factory and cooled under pressure, forcing the crystalline structure of the steel to form flat. They are smithed and tensioned by hand (see picture above) to fine tune the internal tensions in the steel. The result is a blade that is not only very flat and very round to begin with, but stays that way when you generate frictional heat around the perimeter but not in the middle.

Huge chunks of carbide are then trifoil braized onto it and ground by some seriously clever machines to a tolerance of one hundreth of a millimetre, before it goes back to the Smithing shop for a final fettle and inspection.

The saw is listed as requiring a 254mm blade but Chris Walker informed me that almost without exception a 255mm will fit. The whole 254mm thing started out as a marketing ploy to try and restrict customers to buying blades from the equipment manufacturer. Sure enough the standard 255mm fits just fine and the performance is out of this world.

It does take a little bit more grunt to get it spinning (it’s nearly twice the weight of the CMT blade I took off) but once it’s moving the blade runs soooo sweetly, it produces beautiful, almost planed, surfaces with barely a whisper of fluff left behind on the exit side, absolutely marvellous!

The thing that continues to astound me is how the Italians and Americans have managed to gain such a strong foothold in the UK market when we make sawblades of this quality in Sheffield. What's more, I can post it back to the factory to have it resharpened up to ten times for a fraction of the price of a throw-away blade.

Thursday, 27 August 2009

Saws to make your mouth water!

Gyokucho Japanese Saws

I've just received a big pile of parcels from Gyokucho Japanese saws. I don't want to let too much out of the bag yet, but this little treasure was among them.

The Kuroko is an ultra lightweight yet incredibly fast pistol grip saw. The whole thing including the sheath weighs 10 ounces and the saw itself only five, but boy does it get through timber at a rate of knots! A mate popped round while I was taking pictures of them for the website, took one look and bought the one I was photographing on the spot.

Speaking of saws, I've also fixed a date next week to go up to Sheffield for product training with Atkinson Walker. Their range of circular saw blades is mind boggling to say the least, but if we are to list their full selection of hand smithered loveleyness, I am determined to understand every aspect of them in order to ensure that customers can get the best advice possible on which blade to choose.

Tuesday, 4 August 2009

Sharpening and Using English Backsaws

Atkinson Walker Saw

A couple of weeks ago I put together a set of guidelines on how to sharpen, care for and use English Backsaws. Sharpening is easy enough once you know how, but can be an onerous task the first time around, similarly people often have problems starting a cut, but with a little explanation the problem is easily solved. We now send out a paper copy of this with both our PAX and Atkinson Walker ranges of backsaws and backsaw kits.

For people who are not yet customers and those who have bought these products from us in the past but didn't receive a copy with their order, a pdf version of our saw sharpening instructions is available.

Speaking of backsaws, I have just finished carving some lambs tongues into the handles on the prototypes for the gorgeous new PAX 1776 heavy tenon saws, which will be available shortly. One final prototype has gone down to Mark Baker of Furniture and Cabinetmaking to be reviewed in a forthcoming round up of all the top tenon saws on the market. The other is on its way up to Sheffield to be used as the sample so that Christian can carve and sand the production ones to the same spec.

Peter Benson's detail selection carving tools were an absolute godsend for this job, so I've included some in the package going to Sheffield.

Prices for the new saws will be £125 each or £225 for a pair, including VAT and carriage.