negative rake scraper

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Forum topic by Karda posted 02-27-2018 07:19 AM 598 views 0 times favorited 3 replies Add to Favorites Watch
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2265 posts in 1324 days

02-27-2018 07:19 AM

Hi, I want to make a couple negative rake scrapers, but not sure how, Is 1/4 inch thick enough for a 1 inch scraper or should it be thicker. thanks Mike

3 replies so far

View gwilki's profile


351 posts in 2243 days

#1 posted 02-27-2018 02:45 PM

I’ve ground a couple of my scrapers into negative rake. Neither of them is greater than 1/4” thick and they work well.
FWIW, the conventional wisdom seems to be that the included angle of the two bevels should be less than 90°. You will find many opinions on what each bevel should be. I keep mine at the same angle as it makes sharpening easier.

-- Grant Wilkinson, Ottawa ON

View LeeMills's profile


702 posts in 2071 days

#2 posted 02-27-2018 06:36 PM

It should work well for a negative rake. Per Batty (and others) the handle behind the tool rest for a standard scraper is 7 X the overhand. For a negative rake it drops to 3 X the overhang because there is so much less force on it. It also depends on how far over the tool rest you plan to work.
That said, I think thicker is always betta.

-- We cannot solve our problems with the same thinking we used when we created them. Albert Einstein

View Karda's profile


2265 posts in 1324 days

#3 posted 02-27-2018 11:44 PM

ok thanks

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