We have robotic vacuums, and one of the wheel drive motors has failed. (higher than normal resistance to turning) It looks like a simple 2 terminal DC motor just like in a slot car. The encoder is not part of the motor, so I can move that to a new motor. Unfortunately there is no model number or identifying mark on the motor to help me order a replacement. The motor housing is plain cylindrical, roughly 1"x1" with roughly 1/16" diameter shaft.
For people who are used to working with various little DC motors, where would you look on the internet to get a replacement? I'd like to just replace the little motor myself, and I expect some of the other drive motors will eventually need replacement. I've been browsing digikey, but there are oodles of options, many of which are silly expensive for no obvious reason.
I might be able to put it on an oscilliscope eventually, but for now I can't specify the drive signal.