8,000 rpm grinder... Help...

Im getting somewhat started on proting, im looking for some heads to practice on (betting on ebay), and looking for a grinder, just 1 problem, I can't find an electric; 8,000 rpm die grinder, with a 1/4 colett.

HELP... I've already looked on ebay, anyone know where I can order it at? (preferably an electric; 8,000 rpm grinder, and no more rpm's).



<font size=-1>[ This Message was edited by: RoadRunna on 4/29/07 11:37am ]</font>

Ok. sa-motorsports.com said that a 10,000 to 12,000 rpm grinder is necessary.

Any of you guys running an electric grinder, and some how slowed the RPM's?

I found some die grinder's on ebay with a speed setting changer; only problem now, it doesn't support the 1/4 colett. can't I just get away with putting on a different colett's on any die grinder?

<font size=-1>[ This Message was edited by: RoadRunna on 5/4/07 9:15am ]</font>

<font size=-1>[ This Message was edited by: RoadRunna on 5/5/07 6:59am ]</font>

I got my elec. die grinder (1/4" collet) from harbor freight for $40 or so, then used a speed controller for a router, think it was $12 or so. Works great and is cheap. A good set of burrs is what costs money, but they are worth it.

I just got a speed router controller as well from harbor freight as well.
What's the max speed on your die grinder?

Ok, got my die grinder and my speed router control. The speed router control works awesome, from 0 rpm's to 25,000 (die grinder max specs).

I've spent 33 dollars on both, in box, and new.

I just need the cartridges (rolls), and then some practice on some cheap heads.

Ive always used makita die grinders with no issues. I have only replaced one and that was due to dropping it on a bucket of oil it slipped out of my hand. They last for a long time i am looking to find a way to turn the rpms down since it spins at 25,000 rpm. I had a controller to turn down the speed/rpm but it got lost in a move.

I have used my die grinder for atleast 15 sets of heads and other various jobs like clearanceing engine blocks and oil drain back holes and to chamfer a few cranks.

My makita die gronder is still working great and thats been over the past 5 or 6 years . i have definately gotten my moneys worth out of them.

Makita ! Best spent $100. better get an rpm adjuster because its gonna want to fly outta your hands.

same here, a makita is the best

I don't use the 1/4" shanks. I find that the Dremel tool with the cable allows much better control and allows me to get into places that the larger grinders can't get into. I have air powered die grinders that use the 1/4" shanks but there is almost no control with that tool in your hands. Using 1/8" shanks on carbide burrs, sanding drums and cutting discs in a Dremel I can hold the 3/4" handle in one hand and have excellent control to cut straight lines, gentle radius changes and blend into the existing passages with almost no fatigue. Using the larger tools always wore me out and left me wanting to go back and correct the "racing stripes" from runaway burrs. It takes a bit longer to remove material with the smaller tools but I am doing it for me - no customer to complain about how long it takes.