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Price is$300$250 ea (shipped within CONUS). If you live outside the US, I will contact you after your order for extra shipping charges.
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what grit material?
- Thread starter pepsicat
- Start date
- Joined
- Apr 8, 2016
- Messages
- 6,630
Depends on the steel and what your trying to accomplish.
Also that question should be posted here
https://www.bladeforums.com/forums/maintenance-tinkering-embellishment.794/
Also that question should be posted here
https://www.bladeforums.com/forums/maintenance-tinkering-embellishment.794/
Wowbagger
Gold Member
- Joined
- Sep 20, 2015
- Messages
- 8,006
When ever I can I like to use zirconia. The stuff has particularly sharp points on the grit and lasts a long time when power sanding the milder alloys.
Specifically Zirconia Alumina
The stuff tends to be blue in color
Looks like these.
thanks for the reply!
- Joined
- Apr 12, 2009
- Messages
- 13,435
Diamond (Knoop hardness = 7000; top of the scale):
Best by far, on very wear-resistant steels with 3% or more vanadium. Think of steels like S30V (4%), S90V/110V (9-10%) and others like them with heavy vanadium carbide volume (Knoop ~ 2800), for steels best-handled with diamond. For powered grinding of steel, diamond should be avoided, because it heats up & breaks down, and it's carbon will chemically react (combine) with the iron in the steel. Diamond belts will be ruined by it, if not kept cool.
Silicon carbide (Knoop hardness = ~ 2600):
More aggressive cutter of mid-higher-alloyed steels with more wear-resistance, mostly from chromium carbides (Knoop ~ 1700 or so). They do best on steels like 440C, D2, ZDP-189, 154CM, etc with not too much vanadium content (less than ~ 3% or so vanadium).
Aluminum oxide (Knoop hardness = ~ 2100):
Simpler steels from carbon (1095, CV) and low-to-mid-alloyed stainless (420HC, 440A/C, 154CM, VG-10, etc) respond fairly well or excellently to this abrasive. This category would include most 'ceramic' hones, which are also (usually) aluminum oxide, but with stronger bond for the grit. Very dense & hard as a stone; they don't shed much grit over their life. So-called 'Zirconia' is also aluminum oxide, but with zirconium added to enhance toughness (durability) of the AlOx grit, especially on powered, belt-driven grinding applications.
'Natural' stones, a.k.a, 'Arkansas' stones (Knoop hardness = ~ 825):
Grit not very hard (it's called 'novaculite'), but hard enough to do a good/excellent job finishing steels like 1095, CV and low-alloyed stainless (420HC, 440A). Steels like these have little or no significant hard carbides (chromium, vanadium), which is why they're not too difficult on Arkansas stones.
Best by far, on very wear-resistant steels with 3% or more vanadium. Think of steels like S30V (4%), S90V/110V (9-10%) and others like them with heavy vanadium carbide volume (Knoop ~ 2800), for steels best-handled with diamond. For powered grinding of steel, diamond should be avoided, because it heats up & breaks down, and it's carbon will chemically react (combine) with the iron in the steel. Diamond belts will be ruined by it, if not kept cool.
Silicon carbide (Knoop hardness = ~ 2600):
More aggressive cutter of mid-higher-alloyed steels with more wear-resistance, mostly from chromium carbides (Knoop ~ 1700 or so). They do best on steels like 440C, D2, ZDP-189, 154CM, etc with not too much vanadium content (less than ~ 3% or so vanadium).
Aluminum oxide (Knoop hardness = ~ 2100):
Simpler steels from carbon (1095, CV) and low-to-mid-alloyed stainless (420HC, 440A/C, 154CM, VG-10, etc) respond fairly well or excellently to this abrasive. This category would include most 'ceramic' hones, which are also (usually) aluminum oxide, but with stronger bond for the grit. Very dense & hard as a stone; they don't shed much grit over their life. So-called 'Zirconia' is also aluminum oxide, but with zirconium added to enhance toughness (durability) of the AlOx grit, especially on powered, belt-driven grinding applications.
'Natural' stones, a.k.a, 'Arkansas' stones (Knoop hardness = ~ 825):
Grit not very hard (it's called 'novaculite'), but hard enough to do a good/excellent job finishing steels like 1095, CV and low-alloyed stainless (420HC, 440A). Steels like these have little or no significant hard carbides (chromium, vanadium), which is why they're not too difficult on Arkansas stones.
No way ! This ................CBN ABRASIVE BELTS
