RX-28, MX-28, DX-117 replacement motors
RX-28, MX-28, DX-117 replacement motors
by Bullit
Sat May 18, 2013 12:14 am
I recently did some work to measure and determine exactly which motor is used in all three of these Robotis servos (RX-28, MX-28, DX-117) All use the same Maxxon motor.
The motor is a 4W 12V core less motor
Maxxon PN 214897
Maxxon PN 214897
These can be purchased directly from Maxxon although they are some what expensive, still much less than a new servo.
The stock motor has a custom Robotis part number. This is because Robotis has Maxxon laser weld the pinion to the motor shaft.
The laser welded steel pinion gear is a 0.3 module, 13 teeth, 4.88 mm OD.
Gears can be removed from old motors by grinding off the shaft end and weld.
The gear can be re-installed onto a new motor with epoxy.
Gear stock can also be found else where.
I hope this helps others looking to repair servos in need of new motors
The motor is a 4W 12V core less motor
Maxxon PN 214897
Maxxon PN 214897
These can be purchased directly from Maxxon although they are some what expensive, still much less than a new servo.
The stock motor has a custom Robotis part number. This is because Robotis has Maxxon laser weld the pinion to the motor shaft.
The laser welded steel pinion gear is a 0.3 module, 13 teeth, 4.88 mm OD.
Gears can be removed from old motors by grinding off the shaft end and weld.
The gear can be re-installed onto a new motor with epoxy.
Gear stock can also be found else where.
I hope this helps others looking to repair servos in need of new motors
