Momma's got a new ride!
Cool / Posted by Kmot / Oct 08, 2009 @ 11:37 PM / 1,537 Views / 8 Comments
My honey got her new 2010 Ford Taurus Limited today. 
6 weeks from order till delivery. It's a gorgeous car.
6 weeks from order till delivery. It's a gorgeous car.
Turning down the shaft of a sealed can motor
Mini-HowTo / Posted by Kmot / Sep 22, 2009 @ 02:45 AM / 1,554 Views / 6 Comments
I have a boat I am rigging, and I will be using a Graupner Speed 700 BB motor. It has a 5mm output shaft. The motor will be used in a gearbox, and the gears are 48 pitch. Spur gears are no problem, but all the pinion gears I needed have a 1/8" bore. That left me two options: drill out a narrow bore oversize to 5mm, or turn down the output shaft to 1/8".
With a motor that can be disassembled, that would be no problem. Take out the armature, chuck it in the lathe, and turn it down. Been there, done that.
But with a sealed can motor like the Speed series from Graupner, you cannot disassemble the motor without destroying it.
I came up with a solution. I put the motor into the chuck of my lathe, just to hold the motor securely. Then I powered the motor itself with a 6-cell NiMh battery and then used my lathes cross slide and cutting bit to turn down the shaft. :cool:
The motor speed was a bit ridiculous for machining purposes, that's for sure. I burned up a couple sides of my insert getting it dialed in. But it all worked out and I got the motor shaft turned down to .125" and can use the several pinion gears without worry of the hub failing.
With a motor that can be disassembled, that would be no problem. Take out the armature, chuck it in the lathe, and turn it down. Been there, done that.
But with a sealed can motor like the Speed series from Graupner, you cannot disassemble the motor without destroying it.
I came up with a solution. I put the motor into the chuck of my lathe, just to hold the motor securely. Then I powered the motor itself with a 6-cell NiMh battery and then used my lathes cross slide and cutting bit to turn down the shaft. :cool:
The motor speed was a bit ridiculous for machining purposes, that's for sure. I burned up a couple sides of my insert getting it dialed in. But it all worked out and I got the motor shaft turned down to .125" and can use the several pinion gears without worry of the hub failing.
