What abrasive for Sharpening a Carbide cutter ?

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I've got a handful of dull carbide lathe cutters that could use a touchup.


I know I should have a hard green grinding wheel to sharpen these, but I don't


I was wondering if anyone has used a belt, or maybe even flat abrasive on a disc sander to sharpen these.

The disc sander would be the best for me as I can setup the angles there properly.
What paper should I be using ?
 
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A ceramic belt might touch it up....you really need a green wheel for roughing and a diamond wheel for touch-up and sharpening.
 
Tried ceramic and SC on discs and belts- no luck. I actually cut up an old
drill doctor to get at the diamond wheel, works great.
Ken
 
Hi Count. I'Ve been using a fine quality diamond wheel - given to me a long time ago - on my buffing wheel mandrel set up. I have a block of wood for a hand support. Frank
 
Count, I remember a thread from way back on some makers forum or another. Wish I remembered when or where but I'm getting old. The maker used a small diamond wheel, like for an angle grinder and mounted it in his lathe. Then rigged a rest of sorts on his tool post. This allowed him to adjust the height of the grind to allow for some releif. I think the stone came from harbor freight for about $5 and about 2-3 inches in dia.
 
The green Silicon Carbide (Carborundum) grinding wheels and stones were developed for sharpening Tungsten Carbide tool bits. I don't think they're that expensive, especially if they are used.
 
I use a diamond disk used for lapidary work from ebay. They're pretty cheap. Put a bolt through the center hole and tighten it down with a nut on the bolt. Then put the bolt in a drill press and use it like a horizontal disk sander.
 
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