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Author Topic: Rasp from a file  (Read 3680 times)

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Offline zoomer

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Rasp from a file
« on: October 07, 2019, 11:08:26 am »
Been meaning to make my own rasp for bows. I don't have a forge. Here's my idea:
1. grind an old file flat;
2. heat the metal with a torch gun;
3. stitch it while it's hot.
What kind of chisels are used to stitch it? Haven't found anything on the internet.
« Last Edit: October 07, 2019, 11:12:40 am by zoomer »
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Offline Mr. Woolery

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Re: Rasp from a file
« Reply #1 on: October 11, 2019, 10:58:30 am »
https://m.youtube.com/watch?v=gQ09O3d8y9Q

There is a little shot of this guy raising the teeth on a rasp.

Everything else I can find is making knives out of rasps. I know I saw good pictures in an old book, but since I can’t find the book or remember the title, that’s useless to say the least. If I find the info, I’ll be back.

Patrick
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Offline zoomer

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Re: Rasp from a file
« Reply #2 on: October 11, 2019, 11:17:03 pm »
Just tried to stitch a Soviet file. without heating. Too hard. Can't even make a dent. If I heat it with a torch gun and stitch while it's hot, do I need to harden it afterwards?
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Offline DC

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Re: Rasp from a file
« Reply #3 on: October 12, 2019, 10:41:09 am »
Yes and that leads to my question. Once you've stitched it and it's time to re-harden it, doesn't the heat take the edge off the teeth? Is it a very precise temperature requirement? I can see burning the tips off the teeth as a very real possibility.
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