COUPLINGS and Clutches Proportions of Knuckle Joints Machinery's Handbook, 31st Edition
2526
For sizes not given below: a = 1.2 D b = 1.1 D c = 1.2 D e = 0.75 D h = 2 D i = 0.5 D j = 0.25 D k = 0.5 D l = 1.5 D
h g
i
f
e
c
a
b
D
D
D
f = 0.6 D g = 1.5 D
e
f
k
l
D
D
a
b
j
D a
b
c
e
f
g
h
i
j
k
l
1
5 ∕ 8 7 ∕ 8
9 ∕ 16
5 ∕ 8 7 ∕ 8
3 ∕ 8
5 ∕ 16 7 ∕ 16
3 ∕ 4
1 ∕ 8
1 ∕ 4 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 8
3 ∕ 4
1 ∕ 2 3 ∕ 4
1 ∕ 4 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 8
1 1 ∕ 8 1 1 ∕ 2 1 7 ∕ 8 2 1 ∕ 4 2 5 ∕ 8 3 3 ∕ 8 3 3 ∕ 4 4 1 ∕ 8 4 1 ∕ 2 4 7 ∕ 8 5 1 ∕ 4 5 5 ∕ 8 3 6 3 ∕ 8 6 3 ∕ 4 7 1 ∕ 8 7 1 ∕ 2 6
1 1 ∕ 2
1 1 ∕ 8 1 1 ∕ 2 1 7 ∕ 8 2 1 ∕ 4 2 5 ∕ 8 3 3 ∕ 8 3 3 ∕ 4 4 1 ∕ 8 4 1 ∕ 2 4 7 ∕ 8 5 1 ∕ 4 5 5 ∕ 8 3 6 3 ∕ 8 6 3 ∕ 4 7 1 ∕ 8 7 1 ∕ 2 6
3 ∕ 4
9 ∕ 16
3 ∕ 16
1
2
1 1 ∕ 8 1 3 ∕ 8 1 5 ∕ 8 2 1 ∕ 4 2 1 ∕ 2 2 3 ∕ 4 2 3 1 ∕ 4 3 5 ∕ 8 3 7 ∕ 8 4 1 ∕ 8 4 3 ∕ 8 4 3 ∕ 4 3 5 1 ∕ 4 5 1 ∕ 2 5
1 1 ∕ 4 1 1 ∕ 2 1 3 ∕ 4 2 1 ∕ 8 2 3 ∕ 8 2 3 ∕ 4 3 1 ∕ 4 3 5 ∕ 8 4 1 ∕ 4 4 1 ∕ 2 4 3 ∕ 4 5 1 ∕ 8 3 4 5 1 ∕ 2 5 3 ∕ 4
1 1 ∕ 4 1 1 ∕ 2 1 3 ∕ 4 2 1 ∕ 8 2 3 ∕ 8 2 3 ∕ 4 3 1 ∕ 4 3 5 ∕ 8 4 1 ∕ 4 4 1 ∕ 2 4 3 ∕ 4 5 1 ∕ 8 3 4 5 1 ∕ 2 5 3 ∕ 4
3 ∕ 4
5 ∕ 8 3 ∕ 4 7 ∕ 8
1 ∕ 4
1 1 ∕ 4 1 1 ∕ 2 1 3 ∕ 4 2 1 ∕ 4 2 1 ∕ 2 2 3 ∕ 4 2 3 1 ∕ 4 3 1 ∕ 2 3 3 ∕ 4 4 1 ∕ 4 4 1 ∕ 2 4 3 ∕ 4 3 4
2 1 ∕ 2
15 ∕ 16
5 ∕ 16
3
1 1 ∕ 8
3 ∕ 8
1 5 ∕ 16
1 1 ∕ 16 1 3 ∕ 16
3 1 ∕ 2
7 ∕ 16
4
1
1
1 1 ∕ 2
1 ∕ 2
1 11 ∕ 16
1 3 ∕ 8 1 1 ∕ 2 1 5 ∕ 8
4 1 ∕ 2
1 1 ∕ 8 1 1 ∕ 4 1 3 ∕ 8 1 1 ∕ 2 1 5 ∕ 8 1 3 ∕ 4 1 7 ∕ 8 2 1 ∕ 8 2 1 ∕ 4 2 3 ∕ 8 2 1 ∕ 2 2
1 1 ∕ 8 1 1 ∕ 4 1 3 ∕ 8 1 1 ∕ 2 1 5 ∕ 8 1 3 ∕ 4 1 7 ∕ 8 2 1 ∕ 8 2 1 ∕ 4 2 3 ∕ 8 2 1 ∕ 2 2
9 ∕ 16
5
1 7 ∕ 8
5 ∕ 8
2 1 ∕ 16 2 1 ∕ 4 2 7 ∕ 16
5 1 ∕ 2
11 ∕ 16
6
1 13 ∕ 16
3 ∕ 4
2
6 1 ∕ 2
13 ∕ 16
7
2 5 ∕ 8
2 1 ∕ 8 2 1 ∕ 4 2 3 ∕ 8 2 3 ∕ 4 2 7 ∕ 8 2 9 ∕ 16
7 ∕ 8
2 13 ∕ 16
7 1 ∕ 2
15 ∕ 16
3
8
1
3 3 ∕ 16
8 1 ∕ 2
1 1 ∕ 16
9
3 3 ∕ 8
1 1 ∕ 8
3 9 ∕ 16
9 1 ∕ 2 10
1 3 ∕ 16
5
6
6
3
1 1 ∕ 4
3 3 ∕ 4
Power Transmitting Capacity of Friction Clutches.— When selecting a clutch for a given class of service, it is advisable to consider any overloads that may be encountered and base the power transmitting capacity of the clutch upon such overloads. When the load varies or is subject to frequent release or engagement, the clutch capacity should be greater than the actual amount of power transmitted. If the power is derived from a gas or gasoline engine, the horsepower rating of the clutch should be 75 or 100 percent greater than that of the engine. Power Transmitted by Disk Clutches.— The approximate amount of power that a disk clutch will transmit may be determined from the following formula, in which HP = horse power transmitted by the clutch; μ = coefficient of friction; r = mean radius of engaging surfaces; F = axial force in pounds (spring pressure) holding disks in contact; N = number of frictional surfaces; S = speed of shaft in revolutions per minute: , HP rFNS 63 000 µ =
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