Servo Motor Shaft Shapes - Mitsubishi Electric MELSERVO HF-MP Instruction Manual

1. INTRODUCTION

1.5 Servo motor shaft shapes

In addition to the straight shaft, the keyway shaft and D cut shaft are available as the servo motor shafts.
Except HG-AK series servo motors, the key shaft and D cut shaft cannot be used in very frequent start/stop
applications. Since we cannot warrant the servo motor against fracture and similar accidents attributable to a
loose key, use a friction coupling, etc. when coupling the shaft with a machine.
The shaft shape of the standard servo motor changes depending on the series and capacity. Refer to the
chapter of the servo motor series.
The keyway shaft (with single pointed key) applies to only the servo motor with a reduction gear for precision
application.
Key shaft (with 2 round end key)
D cut shaft
Key shaft (with single pointed key)
A
A
Shaft section view AA
Key shaft (without key)
1 - 7
A
A
Shaft section view AA
Straight shaft