CAM CLUTCH

PB SERIES CAM CLUTCH
■ MODELS PB3 TO PB14
For General Applications
+
Specify right
(RH) or left
hand (LH) drive
engagement
viewed from this
end, inner race
driving
q Inner race
w Outer race
e Cam
r Spring
t Plain bearing
y Spirolox
u Side plate
i Lubrication filler plug
o Set screw
Dimensions and Capacities
Model
PB 3
PB 5
PB 6
PB 8
PB 10
PB 12
Torque
Capacity
(N·m)
29.4
147
382
568
843
1530
Drag
Torque
(N·m)
0.20
0.20
0.20
0.29
0.39
0.39
Max.
Overrunning
(r/min)
Inner
Race
1,800
1,800
1,500
1,200
1,000
800
Outer
Race
900
900
800
650
400
300
Max.
indexing
(cycle/min)
150
150
150
150
150
150
PB 14 2110 0.59 700 300 150
Note: Stronger spring type "PB-SS" is available upon request.
Bore Size
Dia.
(J7)
10
16
20
25
31.5
40
45
Keyway
4 × 1.5
5 × 2.0
5 × 2.0
7 × 3.0
10 × 3.5
A
50
70
82
85
92
10 × 3.5 100
12 × 3.5 112
B
50
60
73
83
95
113
133
C
(h7)
23
32
38
45
60
65
75
D
22
32
38
40
41
50
54
E
25
35
37
45
56
66
76
F
21
25
33
33
37
37
41
G
25.7
38.8
41.0
42.0
44.0
52.6
57.3
Outer Race
Keyway
K
4 × 2.5
5 × 3.0
5 × 3.0
7 × 4.0
10 × 4.5
10 × 4.5
12 × 4.5
L
16
20
27
27
28
29
30
Dimensions in mm
Weight
(o)
0.23
0.58
1.1
1.6
2.5
3.6
6.0
Lubrication
Filler Plug
Size × Pitch
M6 × P1.0
M6 × P1.0
M6 × P1.0
M6 × P1.0
M6 × P1.0
M6 × P1.0
M6 × P1.0
Installation and Usage
1. Concentricities of the inner race and the outer race
are maintained by the plain bearing located
between the outer race and the shaft. Radial load
which works on the outer race is also supported by
this plain bearing. The shaft must therefore be
extended through the clutch outer race end.
2. Recommended shaft tolerances are as follows:
Typical installation
Model
PB 3, PB 4,PB 6, PB 8
PB 10, PB 12, PB 14
Tolerance (mm)
+0 to –0.013
+0 to –0.016
3. Do not use the PB Series Cam Clutch as a
coupling. Use with a flexible coupling when
connecting two shafts.
4. Specify right (RH) or left hand (LH) inner race drive
viewed from the end marked by the arrow in the
illustration above. Check if the rotation of the clutch
is correct before being run-in.
5. For indexing use, oil lubrication is recommended.
6. Key to be used should be in accordance with JIS
B1301-1959
7. Thrust load should be supported by other devices,
not by the Cam Clutch.
8. The bore of the driven member, such as the
sprocket on the clutch outer race, should meet H6
or H7 tolerance of the JIS standard.
• When selecting the clutch, see “Information for Selection” on page 77.
For lubrication, see “Lubrication and Maintenance”on page 79.
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