Scraper Plane Conundrum

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Forum topic by AnthonyNOLA posted 11-04-2013 06:00 AM 623 views 0 times favorited 2 replies Add to Favorites Watch
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8 posts in 1239 days

11-04-2013 06:00 AM

I was just on the LN site and I saw for their LA planes they offer a “scraper blade” which ihas a 90 degrees bevel. So, plus the 12 degree bed is 102 degrees… Is there any reason this cant be done with any handplane? if the frog is at 45 degrees, why couldn’t you just get a cheaper no. 4 (or 4 1/2), flip the blade over, and adjust the bevel to 57 degrees. I am sure there is a simple explanation to this I am overlooking, because it almost seems to simple?

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2 replies so far

View Deycart's profile


444 posts in 1676 days

#1 posted 11-04-2013 06:59 AM

There is really no reason. If you wanted to reproduce the same “effect” you could sharpen a blade to 57 degrees. Its the same mechanics. I wouldn’t call that scraping because there is no hook on the blade, but literally everything I have read about increasing the angle when the blade meets the wood would result in a smoother finish, however the trade off is that you might not be able to push that thing though the wood. A steeper angle is harder to control from what I have read. If you were to do this I would suggest trying it out with a no 3 the narrower blade will be easier to push. I would be really interested in what you find out.

View JohnChung's profile


367 posts in 1492 days

#2 posted 11-04-2013 08:34 AM

We can’t achieve 102 degrees with a #4. To achieve that level we need to grind the blade edge way back to 102 degrees. With this shape:


The edge would just ride on the grain can’t dig it. We would need to place a hook on that edge which is another huge hurdle if it is possible at all….. There are some mods out there for #4 that allows it to function as a scraper. Check out LV plane section.

Scraper plane have a high degree angle with the pitch, 102 degrees. It can bow the scraper which lowers the blade projection and stiffen the blade due to the thin material. Some wood that have grain reversal benefits from scrapers. Hand plane would just cause tears in the wood surface.

If you are not sure. Just get a card scraper and a hand plane. Go against the grain with the hand plane compared to the card scraper. Push the card forward with about 102 degrees. Check the difference:)

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