Thread: Norton vs. King

Originally Posted by TTfireman

Thanks guys. That's what i was wanting to know. I lapped it and it came out pretty dang smooth. It is a huge difference. Then I dropped my flattening stone. but I guess if you gotta drop one, drop the cheap one. So now I guess I'll get a dmt for lapping. What's the recommended grit?

Pick up the DMT D8C. Will serve ALL your lapping needs! As was told to me, make sure you lap under running water, so you don't risk losing the diamond coating

*EDIT* DOH! Beat me to it Jimmy....

*EDIT 2* Same price as on SRD, but FREE shipping on Amazon HERE

Originally Posted by hardheart

Norton also does not match JIS with their grit ratings. The 4/8K would be 2.5/4K according to micron size of abrasive particles.

Particle size alone does not determine grit rating. Binders & friability all enter into it. Cigarette smoke is 2 micron but won't cut it as an 8k hone

of course not, at 2 micron it would be 6K

I use average micron grading instead of grit, because of things like Norton's numbers that don't correlate to particle size in any other system for their 4 & 8K.

The feel of a hone is determined more by the matrix and less by the cutting particles. For example I can't tell the difference between my 1 and 5 micron lapping films, but they sure cut differently.

Originally Posted by hardheart

of course not, at 2 micron it would be 6K

I use average micron grading instead of grit, because of things like Norton's numbers that don't correlate to particle size in any other system for their 4 & 8K.

Sooo.. An 8K GS Shapton at just under 2 micron is really a 6k

according to electrical resistance JIS it would be. By FEPA - F1500. CAMI - something like 1750. Again, this is why I look more at micron rating, not grit.