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View Full Version : Regrinding an no.80



Douglas Brummett
09-12-2008, 10:23 AM
Okay, this may be a bit silly to some but I am going to ask anyways.

How do you grind and hone the 45* bevel on a cabinet scraper?

I just got my 80M in the mail last night and gave it a quick once over. It needed one end of it squared back up, so I just took a bastard file to it. Since I did this w/o a fixture the edge is square, but the bevel is not 100% consistent across the length. Normally with a plane iron I would just toss it in my cheap bevel guide and happily set the bevel via scary sharp or set it up on my low speed grinder. In the case of the no.80 neither of these options will work (okay, technically I could grind it with the wheel spinning away and it would work).

I understand that on this cabinet scraper the thing will work with anything from 45-90 on the back bevel. I am more interested in how you hold the blade consistently than the exact angle you grind. Does it fit in an MKII or other jig? Do you make your own? Do you just wing it freehand?

How do you do it?

I flattened the face of the blade with sandpaper 100-600g and raised a burr from the bevel with a course oilstone. Then I knocked that burr off with the 600g. Even with this crude prep the scraper worked fairly well and was able to pull thin shavings. I still need to flatten the sole for better consistency, but I imagine this is a tool I will be reaching for more often than I had thought. Any tips are appreciated on tuning.

I did locate this:
http://www.sawmillcreek.org/showthread.php?t=7103

Unfortunately some of the other go-to reference articles have fallen into disrepair. I have found several people pointing to sites on the use and preparation of scrapers that are no longer there. Any new links?

mike marconi
09-12-2008, 10:49 AM
I use the Veritas MKII (newer model) set at 45 degrees in the high angle position (red) on a 600/1200 grit diamond stone. I don't go any higher than 1200 since I use a #80 for rough work and a card scraper for finer work.

Not sure if flattening the face of the blade is necessary since after you hone the angle you're going to roll a burr back on it anyways.

Mike

Douglas Brummett
09-12-2008, 11:10 AM
Good to know on the MKII. I have been considering one for a while to get a camber wheel. This would be another good excuse to bring that tool into the shop.

I stumbled across some good links this am while avoiding work:
http://web.archive.org/web/20040606212123/www.brendlers.net/oldtools/scraping/scraper.htm
http://www.oldtoolsshop.com/Galoots/cDriggs/modifyano80scraper2/index.html
http://www.leevalley.com/shopping/Instructions.aspx?p=46437

The first addresses the jig question for that writer.

Eddie Darby
09-12-2008, 3:43 PM
Good to know on the MKII. I have been considering one for a while to get a camber wheel. This would be another good excuse to bring that tool into the shop.

If you are just putting a very slight camber on a blade, then these blade guides will do the trick, since the wheel is very narrow. You just push down on one side of the blade, and then the other, to create a very slight camber. Enough for a #4 smoothing blade to not leave any cut lines.


http://shop.com.edgesuite.net/ccimg.catalogcity.com/210000/211700/211762/products/5788809.jpg

Since they are cheap, a second unit could be used with the wheel filed with a little camber to it, for bigger cambers.

Rob Luter
09-12-2008, 5:13 PM
I use a file and dress the edge flat as if I was jointing a saw blade, but holding it at about a 15 degree (approx) angle. I finish up with a burnisher to set a hook on the edge. The thumbscrew on the #80 sets the camber.

Some folks will hone the blade like they would a smoothing plane. I've found that with a thin blade scraper like the #80 it doesn't make any difference. On my #112 with a thick Hock blade it does make a difference.

Your mileage may vary.

Douglas Brummett
09-12-2008, 5:25 PM
Interesting observation Rob. As I noticed coming off sand paper and a course stone, it still produced nice shavings. I didn't burnish mine though. There seems to be some back and forth discussion on burnishing vs. not. So I wanted to try it w/o the hook first.