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Thread: Draw Knife
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30th March 2008, 10:15 PM #1.
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Draw Knife
This is a tool I designed about 2 years ago but was just awaiting a nice fat old file for a blade which I found at a jumble sale for 50c a couple of weeks back.
The file was originally about 7.5 mm thick and 28 mm wide x 400 long. By the time I ground the teeth off and straightened it up it was ~6.5 x 25 mm. handles are just bits of 3/8" rod welded on and sanded back. Jarrah handles and plumbing fittings sanded to size as ferrules.
To cut the long bevel I used an angle grinder (as discussed by Dave? in the D2 plane blade thread) till I got to about 1/2 mm from forming a sharp edge and the switched to a Blue Max wheel. Still took quite a while - had to stop and cool the blade to prevent loss of temper.
And yes it does work - very well in fact!
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30th March 2008, 10:53 PM #2
G'day Bob,
Whats next? A new tool cabinet!
You sure have been busy lately nice work BTW.
How did you get such a nice straight bevel on a bench grinder
Cheers Mike
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30th March 2008, 11:23 PM #3.
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A tool cabinet would be good but my shed is full!.
Anyway in terms of immediate projects Laying on my bench in bits and pieces are
1) A set of 3/16" thick plane makers floats, Have to turn handles and harden and temper the blades. Then make the 1/8" thick complementary set!
2) A 9/10 complete japanese pull (rip) saw.
3) A set of chisels
4) A set of legs for a pair of saw horses
5) A pot plant stand (this has been there for over a year!)
You sure have been busy lately nice work BTW.
How did you get such a nice straight bevel on a bench grinder
Cheers
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30th March 2008, 11:43 PM #4
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31st March 2008, 08:49 AM #5
nice draw knife Bob
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31st March 2008, 10:04 AM #6
Good looking drawknife Bob! I've often wondered about the type with the handles splayed out like that, I've seen them in some catalogues. Did you do any heat treatment, esp. after the welds?
I notice you shaving in a front bench vice, which is what I used to do too. Its an awkward thing to do, the body can never really get in a position to fully use a drawknife, plus the risk of skinning knuckles on the bench! A shaving horse may be out of the question, due to limited room or use, but once you combine that with a drawknife, a whole new world opens up. (I know...none more one-eyed than the converted!) With your ingenuity you mabe able to construct a foot operated clamp that fits in the vice, one that allows you to work 90* to the way you are now, so you have clearance around the work and pull evenly on both handles with your body doing the work?!
Cheers, thanks for posting the pics.Andy Mac
Change is inevitable, growth is optional.
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31st March 2008, 10:45 AM #7.
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Thanks for the feedback Wheelin and Andy.
I've only ever used a straight handled one which was OK and the 90º handle seem a bit awkward so I though I'd try a splayed handled version.
With the welding I tacked up, cooled, and then only welded one side of one side (if you know what I mean) before cooling. It was easy to see the temper oxides (straw, brown, violet, blue) traveling out along the blade and the pale straw basically went out a few mm before the bevel starts. Given how hard it was to cut the bevel the blade is still very hard. I did detemper the blade to a pale straw colour in an oven anyway.
I notice you shaving in a front bench vice, which is what I used to do too. Its an awkward thing to do, the body can never really get in a position to fully use a drawknife, plus the risk of skinning knuckles on the bench! A shaving horse may be out of the question, due to limited room or use, but once you combine that with a drawknife, a whole new world opens up. (I know...none more one-eyed than the converted!) With your ingenuity you mabe able to construct a foot operated clamp that fits in the vice, one that allows you to work 90* to the way you are now, so you have clearance around the work and pull evenly on both handles with your body doing the work?!
After making so many tools, jigs and gizmos it has come to the point where I now have to work out where I am going to put anything before I build it. I have even started to rotate some of the "prettier" tools inside - sort of on display.
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31st March 2008, 10:55 AM #8Andy Mac
Change is inevitable, growth is optional.
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31st March 2008, 07:09 PM #9
Probably unnecessary to bring this to your attention, Bob, but here is a recent piece on Float making:
http://www.wkfinetools.com/tMaking/a...ts/floats1.aspCheers
Jeremy
If it were done when 'tis done, then 'twere well it were done quickly
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31st March 2008, 08:02 PM #10.
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Thanks JK - nice link - the sequence is pretty much my process as well, except I have access to a nice thermostatically controlled furnace to do my hardening and tempering with. I also cut the teeth on them with a mill (see here) which was much easier than a hand file - especially for the 1" wide ones.
I have been using the floats in untempered/unhandled form without to make these japanese saw handles and they are fantastic tools for getting into and shaping out various nooks and crannies etc.
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