RX-28, MX-28, DX-117 replacement motors

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RX-28, MX-28, DX-117 replacement motors

Post by Bullit » Sat May 18, 2013 12:14 am

Post 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 :)
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 :)
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