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How do you sharpen curved scrapers?

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Forum topic by mbs posted 12-23-2013 03:52 AM 1178 views 0 times favorited 7 replies Add to Favorites Watch
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mbs

1606 posts in 2404 days


12-23-2013 03:52 AM

They’re handy tools when sharp but I can’t find any good information on sharpening them. How do you do it?

-- Sorry the reply is so long. I didn't have time to write a short reply.


7 replies so far

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hydro

208 posts in 1215 days


#1 posted 12-23-2013 01:27 PM

The same way that you sharpen straight scrapers, but you apply the process along the curve. Using a burnisher (a smooth screwdriver shank also works), pull the burr back up and away from the edge, then roll it back over. That should get the scraper working again. If it is really screwed up. you will have to hone the burr off, re-square the edge, and then re-form the burr. More work, but not too difficult to do.

If none of this makes sense, do a search on how to sharpen or roll the burr on a scraper online. I’m sure you will find something helpful.

-- Minnesota Woodworkers Guild, Past President, Lifetime member.

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b2rtch

4822 posts in 2512 days


#2 posted 12-23-2013 01:31 PM

with great skill (sorry but i had yo do it!)

-- Bert

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mbs

1606 posts in 2404 days


#3 posted 12-23-2013 02:45 PM

Hydro – do you flatten the edge with a mill file? How do you do the inside curves?

-- Sorry the reply is so long. I didn't have time to write a short reply.

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hydro

208 posts in 1215 days


#4 posted 12-23-2013 03:12 PM

mbs—Yes, when I set up the scraper for the first time I will square the edge by draw filing with a mill file. After that I use an oil stone to hone the edge square and smooth, then proceed to roll the burr. On an inside curve I would use a curved slip stone to prepare the edge, skipping the filing step. Just be careful to keep the edge square to the sides so that the burr will be easier to develop.

-- Minnesota Woodworkers Guild, Past President, Lifetime member.

View Tim's profile

Tim

3114 posts in 1425 days


#5 posted 12-24-2013 02:06 AM

If you want to see a video about what Hydro is talking about, there is one on Paul Seller’s master class site done by his son, a luthier, I think. Shows an outside radius curve, but not an inside one

View Loren's profile

Loren

8303 posts in 3112 days


#6 posted 12-24-2013 02:34 AM

I do the edges on a diamond stone. I’ll put a burr on a curved
scraper only sometimes. They scrape with a stoned square
edge, just not near as aggressive.

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mbs

1606 posts in 2404 days


#7 posted 12-24-2013 02:45 AM

Great info. thanks!

-- Sorry the reply is so long. I didn't have time to write a short reply.

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