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5. SPECIFICATIONS
5.4 Servo motors with special shafts
The standard shaft of the servo motor is straight without a keyway. Shafts with keyway and D cut are
also available. Except for the servo motor with reduction gear.
These shafts are not appropriate for applications where the servo motor is started and stopped frequently.
Use a friction coupling or the like with such keys since we cannot guarantee such trouble as broken shafts
due to loose keys.
Shaft Shape Shaft Shape
Servo Motor Model
Keyway D cut Straight
Servo Motor Model
Keyway D cut Straight
HC-MF053 13
HC-MFS053
13
(Note 4)
HC-RF103 to 503
HC-RFS103 to 503
(Note 2)
(Note 4)
HC-MF23 to 73
HC-MFS23 to 73
(Note 1)
(Note 4)
HC-UF72 to 502
HC-UFS72 to 502
(Note 2)
(Note 4)
HA-FF053 13 (Note 4)
HA-FF23 to 63 (Note 3) (Note 4)
HC-UF13
HC-UFS13
(Note 4)
HC-UF23 to 73
HC-UFS23 to 73
(Note 1)
(Note 4)
HC-KF053 13
HC-KFS053
13
(Note 4)
HC-KF23 43
HC-KFS23 to 73
(Note 1)
(Note 4)
HC-SF81 to 301
HC-SF52 to 702
HC-SF53 to 353
HC-SFS81 to 301
HC-SFS52 to 702
HC-SFS53 to 353
HC-SFS524 to 7024
(Note 2)
(Note 4)
HC-AQ0135 to 0335 (Note 4)
HC-LFS (Note 2) (Note 4)
HA-LA
HA-LFS
(Note 2)
(Note 4)
Note 1. With a key.
2. Without a key.
3. Standard with a key. For shape, refer to chapter 7.
4. This is a standard. For shape, refer to chapter 7.
5.4.1 Keyway
(1) With key
R
Q
QL
QK
A
A
HC-MF(S)23K to 73K
HC-KF23K 43K
HC-KFS23K to 73K
R
HC-UF(S)23K 43K
QL
QK
A
A
Q
H
W
U
S
Y
Section A-A
R
HC-UF(S) 73K
QL
QK
A
A
3.5
2.5
Q
[Unit: mm]
([Unit: in])
Variable Dimensions
Servo Motor Model
S R Q W QK QL U H Y
HC-MF23K 43K
HC-MFS23K
43K
14h6
(14)
30
(1.18)
27
(1.06)
5
(0.20)
20
(0.79)
3
(0.12)
3
(0.12)
5
(0.20)
M4 Depth 15
(0.59)
HC-MF73K
HC-MFS73K
19h6
(19)
40
(1.57)
37
(1.46)
6
(0.24)
25
(0.98)
5
(0.20)
3.5
(0.14)
6
(0.24)
M5 Depth 20
(0.79)
HC-UF23K 43K
HC-UFS23K
43K
14h6
(14)
30
(1.18)
23.5
(0.93)
5
(0.20)
20
(0.79)
3
(0.12)
3
(0.12)
5
(0.20)
M4 Depth 15
(0.59)
HC-UF73K
HC-UFS73K
19h6
(19)
40
(1.57)
32.5
(1.28)
6
(0.24)
25
(0.98)
5
(0.20)
3.5
(0.14)
6
(0.24)
M5 Depth 20
(0.79)
HC-KF23K 43K
HC-KFS23K
43K
14h6
(14)
30
(1.18)
27
(1.06)
5
(0.20)
20
(0.79)
3
(0.12)
3
(0.12)
5
(0.20)
M4 Depth 15
(0.59)
HC-KFS73K
19h6
(19)
40
(1.57)
37
(1.46)
6
(0.24)
25
(0.98)
5
(0.20)
3.5
(0.14)
6
(0.24)
M5 Depth 20
(0.79)