I have a couple of "failed" cordless drills which I regularly use in my workshop. As always its the batteries which lets them down. I removed the batteries and soldered a lead to where the batteries originally received the power and run them from what is home made battery charger with a smoothing capacitor across the charger terminals. My 12 volt drills actually run on 16 volts without any apparent problems. The down side is the chuck speed is quite low, even on the top speed. If you are handy on a bit of simple electronic construction I could send a circuit diagram via a PM.John

If you want more power there is a selection of these about

**LINK**

I understand that the motors are pretty small and light. I've wondered about getting one for some time but they were more expensive than this last time I looked. They may be cheaper on the general web or amazon. On the other hand a universal motor of this rating would probably cost a lot more – pavalux etc. They don't state that this unit is brushless so best ask about that and size of the motor.

One thing to be aware of is that just like treadmill motors they rate them on input power. This seems to be the case on the majority of sewing machine motors. Should be safe to assume at least 1/2 that power gets out. There will be the usual HP reduction when the motor is slowed down via the drive unit. Some one is also selling a more powerful dc motor drive set up but it's more expensive. This probably wont be current limited as with just about all electronic drives for this type of motor.

John

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Edited By Ajohnw on 04/12/2016 11:39:37

I have been playing around with stuff from Minicraft with good success, I converted a Cowells Pillar drill originally for a Proxxon industrial die grinder but the Minicraft MB150 drill works much better for Clock work and should suit your application well with the variable power supply more pictures in the album, as with the Proxxon there is a 20mm dia ally collar to grip securely

I think this design of sensitive drill is the best I have encountered

Edited By Stephen Benson on 04/12/2016 12:43:00