[Noteworthy] Biax Carbide Scraper Blade, Shop Made

"883", "K-10", "C-2" are all the same grade of carbide that are used on cast iron in general. Each manufacture has their own designations as we know with other carbides we use.
Sandvik used to carry a C-5 carbide for scraper blades for scraping steel. Make sure to get the right grade for the application you are working on.
 
I made some hand scrapers with enco carbide it doesn't hold an edge near as well as the sandvik carbide. In fact it dulls pretty fast. When I hosted the Kansas City scraping class Richard King showed me the difference between good carbide and the enco carbide
I now
 
I also made my own scraper blades I started with O1 stock 5-1/2" long 5/32 thick then thinned it down the last 4-1/2" to the thickness of the sandvik insert I cut the carbide in half then silver soldered (1250 degree 50% silver) the carbide to the blade. The blade will turn a dull red at the tip when the solder melts then just move the torch up the blade until the shank end just turns blue. Allow to air cool and the blade will have a spring steel effect without being brittle. Bob

blade side.JPG blade.JPG
 
I am using a #600 lap turning at 600 rpms. The Biax carbides are a lot harder than the Anderson ones and squeal like crazy. I need to find a way to slow it down some more and see if that helps. Maybe a speed control would do it. Tim
 
I finish my carbide with 1200 or 1500 grit turning 150-200 rpm keeping the wheel wet with windex while sharpening. The windex helps prevent the wheel from loading up and helps keep the carbide cool.
 
My original plan was to steal the head off the OD grinder which I intended to scrap. However, this morning the OD Grinder went to auction. I'm hoping that the final $ will be similar, I won't have to spend multiple days disassembling and sorting metal types, and that someone will get a cheap and very usable OD grinder that needs a little work and a lot of floor space. Headstock was variable speed and would have easily hit the target rpm.
I'm falling back on a 10inch lathe application of the diamond wheel with a backing disc.

Daryl
MN
 
Maybe Bob can get us a pic of his grizzly low speed set up and a line on the discs he found for it. We used a Glendo in class, but it looked like his set up was going to do a good job. Quite a bit less of an investment than the purpose built Glendo.
 
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