Standard RC Couplings Specification Table
Approx Single Spkt Cplg Chain Assembled
Cplg No.
Std Finished Bores Incl. Std KW &2 SS
Bore Dia.
A
B
C
L
Cplg. Wt.(lbs) Wt.(lbs)
Cplg Inertia (in lb sec^2)
Min.
Max.
OD.
Approx Approx
4012 4016
¹⁄₂ , ⁵⁄₈ , ³⁄₄
1 ¹³⁄₃₂ 1 ³¹⁄₃₂
1 ¹⁄₈ 1 ¹⁄₈
2 ¹⁷⁄₃₂ 2 ¹⁷⁄₃₂
2 ¹³⁄₃₂
0.5 0.4
0.20 x 10 -2 0.60 x 10 -2
¹⁄₂ ¹⁄₂
⁷⁄₈
⁹⁄₃₂ ⁹⁄₃₂
⁵⁄₈ , ³⁄₄ , ⁷⁄₈ , ¹⁵⁄₁₆
1 ⁵⁄₁₆
3 ¹⁄₃₂
1
0.6
1, 1 ¹⁄₈ , 1 ³⁄₁₆ *, 1 ¹⁄₄ *
5016
³⁄₄ , ⁷⁄₈ , 1, 1 ¹⁄₈ , 1
1 ¹¹⁄₁₆
2 ¹⁄₂
1 ⁷⁄₁₆
3 ¹⁄₄
3 ²⁵⁄₃₂
2.2 1.2
1.89 x 10 -2
⁵⁄₈
³⁄₈
1 ¹⁄₄ , 1 ³⁄₈ , 1 ⁷⁄₁₆ , 1 ¹⁄₂ , 1 ⁵⁄₈ *
5018
³⁄₄ , ⁷⁄₈ , 1, 1 ¹⁄₈ , 1
2 2 ³¹⁄₃₂
1 ¹¹⁄₁₆
3 ³⁄₄
4 ³⁄₁₆
3.5 1.4
3.39 x 10 -2
⁵⁄₈
³⁄₈
1 ¹⁄₄ , 1 ³⁄₈ , 1 ⁷⁄₁₆ , 1 ¹⁄₂ , 1 ⁵⁄₈ , 1 ³⁄₄ , 1 ⁷⁄₈ *, 1 ¹⁵⁄₁₆ *
6018
1, 1 ¹⁄₈ , 1 ³⁄₁₆ , 1 ¹⁄₄
1
2 ⁷⁄₁₆
3 ¹⁄₂
1 ⁷⁄₈
4 ³⁄₁₆
5
5
2.4
8.09 x 10 -2
⁷⁄₁₆
1. ⁷⁄₁₆ , 1 ¹⁄₂ , 1 ⁵⁄₈ , 1 ³⁄₄ , 1 ⁷⁄₈ , 1 ¹⁵⁄₁₆ , 2, 2 ¹⁄₈ , 2 ³⁄₁₆ , 2 ¹⁄₄ , 2 ³⁄₈ *, 2 ⁷⁄₁₆ *
6020
1 ¹⁄₈ , 1 ¹⁄₄ , 1 ¹⁄₂ , 1 ³⁄₄
1
2 ³⁄₄
3 ⁷⁄₈
2
4 ⁷⁄₁₆
5 ¹⁄₂
6.5 2.6
12.4 x 10 -2
⁷⁄₁₆
2 ¹⁄₈ , 2 ³⁄₈ *, 2 ⁷⁄₁₆ *, 2 ⁵⁄₈ * 1 ¹⁄₈ , 1 ³⁄₄ , 1 ¹⁵⁄₁₆ , 2 2 ³⁄₈ , 2 ⁷⁄₁₆ , 2 ⁵⁄₈ , 2 ⁷⁄₈ *, 2 ¹⁵⁄₁₆ *
8018
1 ¹⁄₈
3 ¹⁄₈
4 ⁹⁄₁₆
2 ³⁄₈
5 ²¹⁄₆₄
6 ⁵⁄₈
11 5.5
31.9 x 10 -2
⁹⁄₁₆
8020
1 ¹⁄₂ , 2 ³⁄₁₆ , 2 ⁷⁄₁₆ , 2
1 ¹⁄₈
3 ⁹⁄₁₆
5 ³⁄₈
2 ⁵⁄₈
5 ¹⁄₂
7 ⁹⁄₃₂
16.3 6.1
53.8 x 10 -2
⁹⁄₁₆
2 ¹⁵⁄₁₆ , 3 ¹⁄₈ , 3 ³⁄₈ *, 3 ⁷⁄₁₆ *
10020 2, 3 ³⁄₈ , 3 ⁷⁄₁₆ , 3 ¹⁵⁄₁₆
1 ¹⁄₂
4 ⁵⁄₈
6 ²³⁄₃₂
3 ¹⁄₈
6 ³¹⁄₃₂
9 ¹⁄₈
31.8 10.8
158 x 10 -2
²³⁄₃₂
Notes: The dimensions marked with an asterisk indicates set screws at 90 deg. from keyway.
Covers
Covers allow excellent lubrication, and their use is suggested on all applications to increase both product life and safety.
Cover
For
Wt.
Cplg. Cover Inertia
Part No.
Sizes
D
W Lbs.
(in lb. sec `2) 0.69 x 10 -2 2.00 x 10 -2 5.40 x 10 -2 18.9 x 10 -2 55.8 x 10 -2
40 Cover 50 Cover 60 Cover 80 Cover 10020 Cover .85 1.45 2.55 5.05 12.55 Aluminum covers are supplied with seals to cover the listed sizes. Covers have a rounded exterior in order to offer protection to screw heads. 4012 - 4016 5016 - 5018 6018 - 6020 8018 - 8020 10020 4 5¹⁄₈ 6³⁄₈ 8³⁄₁₆ 10¹⁄₈ 2 2³⁄₈ 2¹⁵⁄₁₆ 4 5¹⁄₄
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