I have recently taken apart a few cassette players to get motors, and I have noticed there is always a metal sleeve around the main drive motor.
The sleeve is not attached to the motor and can be easily removed by sliding it off. I have not seen them on DC motors anywhere else. What is it there for?
The reason I chose an EG-530AD-2B motor is because one of the cassette players I took apart had a 'Mebochi' (not Mabuchi) brand EG-530AD-2B motor with a very similar label to the one shown below, except that the text was blue. I cannot seem to find any information about this online. Does anyone have any idea what it is?