Mitsubishi HG-RR User Manual

10. HG-UR SERIES 

10 -  6 

 
10.5 Servo motors with special shafts 

The servo motors with special shafts indicated by the symbol (K) in the table are available. K is the symbol 
attached to the servo motor model names. 

 

Servo motor 

Shaft shape 

Key shaft (without key) 

HG-UR_(B)K K 

 

Servo motor 

Variable dimensions 

S R Q W QK 

QL U  r 

HG-UR72(B)K 

22h6 55  50 6

0

-0.036

 

42 3 

3.5

+0.1

0

 

3 

HG-UR152(B)K 

28h6 55  50 8

0

-0.036

 

40 3 4

+0.2

0

 

4 

HG-UR202(B)K 
HG-UR352(B)K 
HG-UR502(B)K 

35

+0.010

0

 

65 60 

10

0

-0.036

 

50 5 5

+0.2

0

 

5 

 

QK

A

Q

R

A

QL

U

W

r

M8 Depth 20

φ

Shaft section view A-A

S

 

 
10.6 Oil seal 

The oil seal prevents the entry of oil into the servo motor. 
Install the servo motor horizontally, and set the oil level in the gear box to be lower than the oil seal lip 
always. 

Gear

Shaft

Servo motor

Oil seal

Height above oil level h

Lip

 

Servo motor 

Oil level h 

[mm] 

HG-UR72(B) 
HG-UR152(B) 

20 

HG-UR202(B) 
HG-UR352(B) 
HG-UR502(B) 

25