Drills

Has anyone found anywhere in the UK that sells these Red wheels ?

To be honest, I think the closest you could get to them is the red wheels at B&Q, but youd be better off buying a higher quality wheel

Or find someone with a lathe

does anybody know if mini EV warrior can take 24v?
that motor-- http://www.robotcombat.com/images/store_mini_ev.jpghttp://www.robotcombat.com/images/store_mini_ev.jpg
im trying to put those in 28:1 all metal gears drill gearbox,10cm wheels and two of them for LW (25kg) drive motors.

Mine gets quite warm at 16.8v, but thats coz it was full on/off. No speed control. Im sure if you use speed control, its would be better, but 24v, hmmm maybe pushing it.

Mr Stu

big heatsinks and fans?

Ive had two working in an experimental dual drive gearbox and it is possible to push them to 24v, but be careful with the heat ive always found them to still get fairly hot with a computer fan on. But ide recommend running them at a safer voltage which is what I am now doing with them for tests. (I wasnt aware that you had them Stu !!)

Also ive ordered some HTI Replacement motors and going to try them out, only a couple of $s more but a slight increase in HP output and also able to take 24v. Only downside is at 12v there is a slight drop in rpm compared to the Mini Ev at 12v. So might be worth a look.

Chris - http://www.featherweights.org/forum

The 300psi motors we have found in Australia are basic mini EV clones, weve run them on 24v and they seem to take it quite well. Just as long as you have around 10:1 gearing per 12v them seem to be happy. Thes one we have do around the 12000rpm mark on 12v. I experimentally ran one on 36v survived no load, but ejected a bit of resin from the armature at the 30000rpm+ speeds. The motor still works and doesnt seem to be unbalanced, but I dont think they will last with a load on 36v

I asked HTI motor pinion gear measurements, it has 9 teeth, 42 pitch diameter (whatever does it mean) and the OD is .38
bad luck, pinion gear of 550rpm drills that i have is 9 teeth and 8mm od, at least HTI motor shaft is 3.175mm, should be perfect to replace drill motors.

9 teeth, 42 pitch diamerter means that the gear conforms to the DP standard.A UK standard for gears.

That means that a 1 diameter gear would have 42 teeth.