Non backdrivable drill transmission

[Mark Sheridan]

the dewalt xrp series is non-backdrivable. I used them a few years ago. It was kinda pricy from the service center. I had to get a motor too in order to cut off the pinion. they don't sell the pinion separate. It did require a bit of machining to do. There is a good white paper called "Nothing but Dewalts" by Dr. Joe that is a little outdated but would explain mostly how to do it.

Nowadays, I much rather have a ratcheting wrench on a hex shaft. If you need to rotate in both directions your gonna need to find a good drill. I think 33 found a better one but I can't find which thread they mention it.