My boss pulled a battery operated 18V Matco nut driver apart, so I asked him how much he wanted fot it and he said I can have it, I was trying to figure out a use for it, "possible future usage ideas" the brush contacts are spring loaded that are removible with out taking the hole thing apart, really nice design I thought.
Most of those motors are all standard chinesium. If you look on the motor can you may find a model # to reference. I think Mabuchi makes a large percentage of the DC motors out there.
There is no writing on the housing at all other then a +&- sign near the terminals. I did a Google search and couldn't find anything that resimbled the motor.