Precise grinder

You aren't looking for "stones"--------you're looking for "wheels".

If you follow ebay, with patience, you'll come across a nice selection of wheels for a fair price. Otherwise, be prepared to part company with some serious cash. The cost, each, can be staggering. Most any supplier of grinding wheels should be able to provide your needs, although they may not stock the wheels due to the wide variety available and the small demand.

Be real smart about the wheels you mount. With such a wide speed range, it's easy to over rev a grinding wheel that is not the right size. If all else fails, and you have no clue how fast a given wheel should be run, calculate the surface area and don't run it faster than 6,000 SFPM. Try to run the wheels at the proper speed so they perform properly. A wheel that is run well under speed behaves as if it's soft and won't hold up.

Harold

I've got a couple of

I failed to address this issue. The only real success you'll achieve with grinding carbide is with a diamond wheel. Beyond that, one of the green silicon carbide wheels may do the job, but not nearly as well as diamond. I'm not sure you can buy them is sizes for small grinders. Never seen them in all my years in the shop.

You're not in a good position in this matter. Grinding that much off almost demands running coolant----which is not a good idea on a lathe when grinding. You might be far better off to either buy a bushing the right size, or pay to have them ground. The potential for damaging your machine (by running coolant when grinding) is very real in this instance.

Considering they're for sanding, you might achieve good success by making the right size bushing from drill rod and torch hardening. No grinding necessary. Just a thought.

Harold

You might want to get hold of Precise, and get collets in a more standard size. They are quite expensive, as I remember. I was lucky, and got a 1/8" collet when I bought my spindle on eBay.

Jon

Thanks Harold for the information. I build custom cue sticks and I am going to be using these as standards. I bought two .625 X .875 X 1.0" standard carbide drill bushings and mounted them onto bronze rods. Tapped one for a female thread and put in one of my joint pins in the other. I now need them ground, together, down to my normal joint size. In this way I can turn all my joints down to this size and all of my shafts on the other master and the shafts and butts would all be a standard size and all interchangeable. These will be used many hundreds of times so I wanted a material that would last as long as possible before becoming to much under size. When I built these I intended to have them commercially ground but then remembered that I had this grinder that I had bought on e-bay by mistake. Just figured I would put it to use since I had it. I'll call some commercial grinders tomorrow. Thanks again for the quick reply and information, Dick

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Dick,

No you'll never find the stones (really wheels or points) - the thing is junk - I'll do you a big favour and pay the carriage for you to send it to me

AWEM

Actually, this one doesn't use collets. It has a stud on the end of the spindle to mount a wheel. I guess there could be small bushings to slide over to use a bigger cir. wheel. When I bought it I thought it used collets as that is what I was looking for to run small end mills on my CNC. I did buy another one that uses collets and a .125 collet and nut was

Hmmm, I haven't run across that type device. It sounds much like a toolpost grinder, but direct drive. If the shaft is not keyed, it should be extremely simple to make a bushing for the next size grinding wheel ID. Do you have the frequency changer, or is it the old universal motor type?

Yeah, your quote on Precise collets sounds like their prices.

Jon

The shaft is 10.03 mm. You need to source metric wheels. Bugs