What Collet Chuck have I got?

[Jeremy]

Glad you sorted the smilies out, and that it turned out to be something straightforward, if a little obscure!

I got home from work at lunchtime today to find a package from Arc Euro containing my new ER16 collet chuck, collets, etc had arrived. Pretty good service, as I only ordered them yesterday lunchtime. Less than 24 hours from placing the order to arriving on my doorstep seems remarkable.

I'm currently perusing the RC motor web sites looking for a suitable motor. I think I've found one that will be OK and should give me a spindle speed of up to around 30,000 rpm using the spare 12V, 30A, power supply I have. These things are amazing value, I can get a brushless three phase motor rated at around 450 watts or so, complete with a suitably over-rated speed controller, for around £30, including postage.

The current plan is to directly drive the spindle from the motor shaft, using a suitable coupling.

Next hunt is for decent deep groove bearings that will spin at 30,000rpm - methinks I might well be into ceramic ball technology at these speeds.............

Jeremy

[Robin Hewitt]

The current plan is to directly drive the spindle from the motor shaft, using a suitable coupling.

Hi Jeremy

What is a suitable coupling for 500 revs/second? :confused:

Balance probably isn't a prime consideration, but no bending parts obviously.

I'd probably go for a rod though one shaft engaging a pair of driving dogs on the other, then spend half an hour adjusting it 'till it ran quiet :D

best

Robin