I posted this question in the router building section and didn't get any replies, so I thought I'd try it here. My question is... Is there any spindle motors or palm routers for cnc router that aren't jacked up to 15,000 to 30,000 rpms? I got a Rotozip on mine, and it's good for everything not metal.
I just want to do some very light machining on steel, and don't want to burn up my bits. Getting a milling machine is out of the question right now. What I want to do is plunge a 1/16" carbide endmill about .040 into steel, and do it repetitively. I need about 3000 rpms, but even a spindle tool that would go down as low as 5000/7000 rpms I would be happy with. I am unfamiliar with the 240v stuff, and I only have 110/120V electric. As of now, at 15,000 rpms and keeping the feed low, it's just not working. Thanks for your help.

Hw about a Sherline motor?  I'm pretty sure that they sell them as spare parts.

Mike

Don't they sell a foot pedal or vari-stat or something so you can slow the Rotozip down?
RICH

I'll definitely look into that Rich. Don't know much about Sherline, but will look into it Mike. Thanks much, I always get the best help from the guys on this forum.

Just did some research. I believe what I'm looking for is called a rheostat. They sell on Ebay for about $18.00 bucks and work for ac/dc motors. If this works out, I'll be thrilled. Thanks again.

I can give you some "been there, done that" advise on using a rheostat. You will loose a considerable amount of power when slowing the motor down. Plunging a .125 endmill down 0.04 might not be any problem, but doing anything that taxed the motor at full speed, would be futile at a slow speed. Start the motor at full speed, then ramp down the speed. Don't try to start it slow, unless you want to blow fuses or fry the windings in the motor. Good luck.

Thanks Sam,
Let me add this. I think they call them vari-stats. They are used for hot plates. Don't use them for slowing down an AC motor (  drops voltage and amperage goes up and can fry a motor). Never use one instead  of a  transformer to lower the ac for  converting to DC ( you can get electricuted because of the grounding).
RICH

Have you considered using a vari-speed drill motor?  I have a motor from an 18VDC drill that I plan to adapt to my router (when I get a round tuit 
Regards,
John Champlain

I bought the rheostat for 18 bucks and milled .080 nickel silver using a 1/16 carbide ballnose. I cut up a 2x6" sheet of material into 40 little pieces. I think the deepest I could mill at once was .030, but hey, at least I milled it. Not bad for a 15,000 to 30,000 rpm mini router.