As we cross the deadline for British Woodworking’s Planemaker of the Year 2010 challenge [apologies if I hadn’t mentioned it before!], I’m now happy to walk you through the design of my entry. I also understand that all entries will be on display at the European Woodworking Show, early next month.
For those of you who may not follow Britain’s No.1 woodworking magazine often enough; the brief requires all entrants to make a wooden plane for primarily planing long-grain within the dimensions of 250mm long x 75mm wide and no greater. This competition has spawned off the success of the Block Plane Challenge – this initiative was started by the magazine in 2009 and, as it has already proven to be a success amongst one school in Oxford, it is growing at a steady rate, with several other schools now encouraged to take up the challenge next time. Students are encouraged to design and produce their own block planes, which they then go on to use in other projects.
During the first iteration of this initiative, it was discovered that teenagers found standard 50mm blades (as found in most no.4 smoothing and no.5 jack metal planes) were uncomfortable to use, which is why they’ve since switched over to using shorter block plane blades, with a width of 35mm (as I have also done). It may be that, through future use of this plane, I realise I should’ve tried harder to accommodate a wider blade… Essentially, I made this one as a trial or mock-up for future designs and, to be brutally honest; with its narrow cutting width, I’m not sure exactly where it would fit in amongst my arsenal of metal-bodied planes! There are a couple of features I’ve included which I think you may like – so, please, read on!
Before I set about making this plane, I decided that one of the most important features was that it had to be comfortable to hold and use, which is why I made a 1:1 scale mock-up in American lime first, before cutting any oak; in order to get the ergonomics right (…first time, as well! ;-)):
Another important feature I wanted to try and include was a means to simply and quickly adjust the width of the aperture in the sole of the plane.
My inspiration came from your average low-angle block plane, where the the front-piece of the sole is able to slide back and forth by loosening the thumb-screw at the toe-end of the plane. On most larger bench planes, you have to partially strip the plane apart and loosen two screws securing the frog to the sole, before then moving the frog assembly as required (yes, it is as awkward and time-consuming as it sounds!).
In order to achieve this, I built up a T-section of oak for the sole which slides in a corresponding T-slot, routed in to the front of the plane’s body. Inside of this is a concealed sliding nut (M6 thread – available from Workshop Essentials.com), which is secured using a 50mm long set screw [5mm allen key] from above (hence, the hole you can see in the first photo, near the toe).
In hindsight, I wish I had made the T-section larger, as there is an apparent weakness in this construction. So far, it’s holding up well and the glue is doing its job. However, it would only take for someone heavy-handed to carelessly over-tighten the screw and the two halves could come apart…! 😕
Below is a better shot of how it looks from the front-end, where I’ve also stamped my initials and the date of completion (I now wish that I’d stamped this on the back of the plane, instead!):
Whenever you’re making a plane that’ll be used to cut along the grain, it’s important to allow plenty of room for the long, curly shavings to clear. Particularly if you’re likely to be taking heavy cuts (producing thick shavings). It’s not unknown for woodworkers to take a fine to the mouths of the metal bench planes, in order to improve things, here. I had to take a chisel to mine eventually. Remember: it’s the adjustable sole-piece that makes the real difference. This gap can, theoretically, be much bigger than it is, below:
Traditionally, wooden planes would have a wedge to secure the blade in place. I wanted to try and more ‘modern’, conventional approach by screwing a timber “cap iron” in place directly over the iron (as you would find on a metal plane). This works very well, for me, and it’s dead easy to set and remove (it’s much quieter, too! ;-)). I deliberately made the underside slightly hollow in the centre so that, as the cap screw is tightened, firm pressure is distributed at both ends of the iron to hold it steady in place and to reduce chatter at the ‘business’ end. With older metal planes (and, indeed, many dirt-cheap modern Chinese models) you can often find that there’s a slight gap below the front end of the cap iron, which also means that shavings can collect and wedged themselves in above the blade. It’s hollow by only 1mm, if that. This is actually the second one I’ve made… The first had a depression of close to 3mm and, upon tightening the screw, the oak split in two! 🙄
I’ve also fitted a block plane blade that’s thicker than the standard issue irons. This one’s from the Quangsheng factory in China, available from Workshop Heaven for about £10. Very reasonable, I thought. While it would’ve been nice to have used a British-made iron; the simple fact is that Clifton don’t make block planes, let alone the blades to fit them. I probably could’ve found another UK manufacturer but, I bet it would’ve cost more than these Chinese imports (I still look upon this plane as a “prototype”-of-sorts, after all).
My final shot for now shows the plane in use. You can see how my left thumb hooks around a ‘lip’ I created just behind the toe and also, how my right-hand ergonomically fits around the rear of the plane; applying pressure both forwards and downward during the cut. It was finished with three costs of Chestnut’s hard wax oil and two applications of a Superwax Polish from Smith & Roger. As I’ve somehow failed to mention this already; in case you can’t tell, this plane is made from a mixture of regular ‘light’ English oak and brown oak, where the darker streaks and staining is caused following an attack by the Beef Steak Fungus!
If you are likely to be attending the European Woodworking Show in Essex next month; do keep an eye out for this plane and all the others that’ll be on show with British Woodworking magazine. One day, I’d still like to build a long plane for shooting the edges of long boards (something akin to a no.8…) and, perhaps more importantly, a “skew mitre“-style plane for trimming end-grain on a shooting board. As much as I can appreciate the work of true plane-makers [see Philly Planes], building this one for the competition has instilled a lot of confidence and belief within myself. 🙂
Plane “enthusiasts” may be shocked to discover that I haven’t given much consideration to all the necessary angles involved with hand-plane design… My reason for choosing screws with a hexagonal-drive head is that I find them much easier to use than the traditional slotted screw. You get a more positive location with an allen key and, if you do slip, you’re far less likely to ruin the head.
Thanks for reading.