Primitive Archer

Main Discussion Area => Horn Bows => Topic started by: stuckinthemud on January 17, 2020, 08:29:31 am

Title: toothed scrapers- how do you cut the teeth?
Post by: stuckinthemud on January 17, 2020, 08:29:31 am

I have been trying to hand-file teeth into some old saw blades and hack-saw blades with little success, my files are just skating over the hardened steel with little effect even though they bite really well into mild steel.  What is the best approach, I only have hand tools?

Title: Re: toothed scrapers- how do you cut the teeth?
Post by: DC on January 17, 2020, 10:52:56 am

I used a piece of an old handsaw blade. Files nicely and holds an edge.

Title: Re: toothed scrapers- how do you cut the teeth?
Post by: gorazd on January 17, 2020, 11:03:40 am

Quote from: stuckinthemud on January 17, 2020, 08:29:31 am

I have been trying to hand-file teeth into some old saw blades and hack-saw blades with little success, my files are just skating over the hardened steel with little effect even though they bite really well into mild steel.  What is the best approach, I only have hand tools?

Take a special file for ski edges ...  they are tough and fine
Count the moves (!!!) with a file and do it only on one slope of the saw tooth  - to keep the "wave lenghth" more even - speaking from physics language - when comparing the picture of scraper with a triangular wave  ;)

Title: Re: toothed scrapers- how do you cut the teeth?
Post by: bownarra on January 17, 2020, 01:16:43 pm

There are commercially available scrapers with laser cut teeth. Dictum has them in. I got one from them that is 2mm thick and it is absolutely superb. Much better than scrapers made from thinner material. I still use a thin cabinet scraper with filed teeth for the initial groove cutting with the projecting foot.

Title: Re: toothed scrapers- how do you cut the teeth?
Post by: Markus on January 19, 2020, 05:41:48 am

https://www.dictum.com/en/scraper-and-putty-knives-baem/dictum-serrated-scraper-for-bowmakers-serrated-scraper-blade-703240
Cost a few dollars, but very good

Title: Re: toothed scrapers- how do you cut the teeth?
Post by: avcase on January 31, 2020, 09:33:35 pm

Those scrapers really seem to be a good deal, especially considering how specialized they are.

Alan

Title: Re: toothed scrapers- how do you cut the teeth?
Post by: stuckinthemud on May 17, 2020, 11:53:07 am

Found  steel I can use- a brick-layer's trowel don't know how old it is, the steel is over 1mm thick