Advice on belts for grinder, and where can I get some M2

S

Snickersnee

Joined
May 2, 1999
Messages
1,206
I wanted one of those cool variable speed jobs like a square wheel, but no way I could afford one. I settled for a Dremel 1x30 since it looked to be the most flexible and best suited of the grinders I saw on the local market. Delta makes a similar model for a bit less, but I had a delta belt/wheel combo for a while and the belt wouldn't stay on more than a few seconds, so I figured the stand alone model probably wouldn't be any better.

Anyway, everything I've done has been on a carbondum wheel and with hand tools. I went for a belt grinder because I liked the way the delta I had hogged off metal and it seemed a little easier than the wheel. I don't really know what to do about belts though. I know I'll need a coarse size for stock removal, and a finer size for making it look nice, but what grits are reccomended?

Also, there's a lot more than just aluminum oxide now, or maybe I just discovered there's more than aluminum oxide. Are the zincromium's or ceramic's worth it? I know the ao belts on my delta seemed to give out pretty quik, and they were close to the length of my new Dremel. I know belt length would be optimum for long life, but do either of the exotics have it all up on aluminum oxide?

And where can I get some M2, or L6 for that matter? All the places on the net I've found seem to only carry the same things, ATS-34, BG-42, 440C, O1, D2, A2, and the 10xx simple steels.

I want a tough blade with corosion resistance, and I'm think M2 with a chromium nitride coating would be the way to go. The logic being I know that stuff has to be put on hot, so an alloy with a lot of moly sounds like the way to go.

Or, conversly, can you coat first and then heat treat? Most of the coatings go on at 400 degrees or so, so would they be damaged by the high heat or heat treating?
 
Hi Snick.

I would try and contact a local machineshop, they might have a piece of M2 they can sell you, if it helps the werkstoffnummer for M2 is 1,3343.

Álso the coating sounds like a good idea, i have a BM stryker wich i have had TiAlN- coated, and i am pleased with it.
I have no wear at all of the coating, and what looks like a scratch at first turns out to be some other metal rubbed on to the finish.

Some coaters are now offering coating at low temperatures, i think down to 150-230 degrees celsius( i dont know the fahrenheit), and it is also possible to combine the very hard nitride coatings with teflon non-stick coatings.

I dont know the price, but i have heard some wild prices, but i ended up paying about 15 us$ for coating one blade, so i hope you find the right coater.

I hope that you can use this information, and good luck with the knife.

Cheers.


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Claus Christensen

When you have playboy channel, why get married
 
I have used about all the different kinds of abrasive belts that are listed in the supply catalogs. I could grind five ATS-34 blades with one zirconia belt. I thought that was good till I tried a Norton Hogger from Tru-Grit. With a Norton Hogger in a 60 grit, I can easily grind over 20 blades on one belt. I am still amazed at how long the 60 grit Norton Hogger belts last. I have tried the Norton Hogger belts in other grits but 60 grit works best for grinding in the bevels on a knife blade.
 
royal, what size belts are you using? how many blades could i expect to get from a zirconium 3"x132"? i grind blades from 440c mostly, but i do also use ats-34, d-2, and bg-42. Can i get norton hoggers in 3"x132"?
 
The belts I use are 2X72 inches. I looked in the Tru-Grit catalog and don't see any 3X132 belts listed. I don't know of any other source for Norton Hoggers other than Tru-Grit, but there probably are some. You might try contacting the Norton Company as to the avaliability of the Norton Hogger belts in the 3X132 inch size. The Norton Hogger is a ceramic belt. It costs a little more than the zircona, but does a LOT more work. Good Luck.
 
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