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10. SPECIFICATIONS
10-4 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.
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.
Servo Motor Model
HC — MF053 · 13
HC — MF23 to 73
HA — FF053 · 13
HA — FF23 to 63
Note: 1. With a key.
2. Standard with a key. For shape, refer to Section 10-5-2.
Machining Dimension Diagram
With key
R
Q
QK QL
A
A
HC—MF23K to 73K
HC—UF23K to 73K
Shaft Shape
Keyway
D cut
(Note 1)
(Note 2)
R
Q
QK QL
Variable Dimension List
A
Servo Motor
Model
A
HC — MF23K · 43K
HC — MF73K
W
HC — UF23K · 43K
Y
øS
HC — UF73K
Section A-A
Servo Motor Model
HC — SF53 to 353
HC — SF53 to 352
HC — SF81 to 301
HC — RF103 to 203
HC — UF72 to 202
HC — UF13
HC — UF23 to 73
Variable Dimensions
S
R
Q
W
14h6
30
27
5
(14)
(1.18)
(1.06)
(0.20)
(0.79)
19h6
40
37
6
(19)
(1.57)
(1.46)
(0.24)
(0.98)
30
23.5
5
14h6
(1.18)
(0.93)
(0.20)
(0.79)
(14)
40
36.5
6
19h6
(19)
(1.57)
(1.44)
(0.24)
(0.98)
10– 14
Shaft Shape
Keyway
D cut
(Note1)
[Unit: mm]
([Unit: in])
QK
QL
U
H
20
3
3
5
(0.12)
(0.12)
(0.20)
Depth 15 (0.59)
25
5
3.5
6
(0.20)
(0.14)
(0.24)
Depth 20 (0.79)
20
3
3
5
(0.12)
(0.12)
(0.20)
Depth 15 (0.59)
25
5
3.5
6
(0.20)
(0.14)
(0.24)
Depth 20 (0.79)
Y
M4
M5
M4
M5
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