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Retaining Ring (Excerpt from JIS B 2804 2010)

Last updated:18 June 2019

Index

Eccentric C-shaped Retaining Rings for Shafts, and Shapes and Sizes of Applicable Shafts (Reference)

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Unit [mm]

Nominal dia. Retaining ring Applicable shaft (reference)
Column 1 Column 2 d3 t b a d0 d5 d1 d2 m n
Basic size Tolerance Basic size Tolerance Approx. Approx. Min. Basic size Tolerance Basic size Tolerance Min.
10 9.3 ±0.15 1 ±0.05 1.6 3.0 1.2 17 10 9.6 0
- 0.09 		1.15 ＋0.14
0 		1.5
11 10.2 1.8 3.1 18 11 10.5 0
- 0.11
12 11.1 ±0.18 1.8 3.2 1.5 19 12 11.5
14 12.9 2.0 3.4 1.7 22 14 13.4
15 13.8 2.1 3.5 23 15 14.3
16 14.7 2.2 3.6 24 16 15.2
17 15.7 2.2 3.7 25 17 16.2
18 16.5 1.2 ±0.06 2.6 3.8 26 18 17.0 1.35
19 17.5 2.7 3.8 2 27 19 18.0
20 18.5 ±0.20 2.7 3.9 28 20 19.0 0
-0.21
22 20.5 2.7 4.1 31 22 21.0
24 22.2 3.1 4.2 33 24 22.9
25 23.2 3.1 4.3 34 25 23.9
26 24.2 3.1 4.4 35 26 24.9
28 25.9 1.5 3.1 4.6 38 28 26.6 1.65
30 27.9 3.5 4.8 40 30 28.6
32 29.6 3.5 5.0 2.5 43 32 30.3 0
-0.25
35 32.2 ±0.25 4.0 5.4 46 35 33.0
36 33.2 1.75 ±0.07 4.0 5.4 47 36 34.0 1.90 2
38 35.2 4.5 5.6 50 38 36.0
40 37.0 ±0.40 4.5 5.8 53 40 38.0
42 38.5 4.5 6.2 55 42 39.5
45 41.5 4.8 6.3 58 45 42.5
48 44.5 4.8 6.5 62 48 45.5
50 45.8 2 5.0 6.7 64 50 47.0 2.2
55 50.8 ±0.45 5.0 7.0 70 55 52.0 0
-0.30
56 51.8 5.0 7.0 71 56 53.0
60 55.8 5.5 7.2 75 60 57.0
65 60.8 2.5 ±0.08 6.4 7.4 81 65 62.0 2.7 2.5
70 65.5 6.4 7.8 86 70 67.0
75 70.5 7.0 7.9 92 75 72.0
80 74.5 7.4 8.2 97 80 76.5
85 79.5 3 ±0.09 8.0 8.4 3 103 85 81.5 0
-0.35 		3.2 ＋0.18
0 		3
90 84.5 ±0.55 8.0 8.7 108 90 86.5
95 89.5 8.6 9.1 114 95 91.5
100 94.5 9.0 9.5 119 100 96.5
105 98.0 4 9.5 9.8 125 105 101.0 0
-0.54 		4.2 4
110 103.0 9.5 10.0 131 110 106.0
120 113.0 10.3 10.9 143 120 116.0

・b is the maximum width of the ring portion of the retaining ring.

・The minimum width of the ring portion of the retaining ring is preferably larger than thickness t.
   It is also preferable that d4 be d4 = d3 ＋ (1.4 to 1.5)b.

・Dimensions for applicable shafts are indicated as reference to recommended dimensions.

・For nominal diameter, column 1 is to be given preference, but column 2 may also be used as necessary.

・The standard dimension of 1.5 for thickness may be 1.6 where agreed between supplying and receiving parties. However, in this instance, m is 1.75.

・The standard dimension of 1.75 for thickness may be 1.8 where agreed between supplying and receiving parties. However, in this instance, m is 1.95.

Eccentric C-shaped Retaining Rings for Holes, and Shapes and Sizes of Applicable Holes (Reference)

Unit [mm]

Nominal dia. Retaining ring Applicable hole (reference)
Column 1 Column 2 d3 t b a d0 d5 d1 d2 m n
Basic size Tolerance Basic size Tolerance Approx. Approx. Min. Basic size Tolerance Basic size Tolerance Min.
10 10.7 ±0.18 1 ±0.05 1.8 3.1 1.2 3 10 10.4 ＋0.11
0 		1.15 ＋0.14
0 		1.5
11 11.8 1.8 3.2 4 11 11.4
12 13.0 1.8 3.3 1.5 5 12 12.5
13 14.1 1.8 3.5 6 13 13.6
14 15.1 2.0 3.6 1.7 7 14 14.6
15 16.2 2.0 3.6 8 15 15.7
16 17.3 2.0 3.7 8 16 16.8
17 18.3 ±0.20 2.0 3.8 9 17 17.8
18 19.5 2.5 4.0 10 18 19.0 ＋0.21
0
19 20.5 2.5 4.0 2 11 19 20.0
20 21.5 2.5 4.0 12 20 21.0
22 23.5 2.5 4.1 13 22 23.0
24 25.9 1.2 ±0.06 2.5 4.3 15 24 25.2 1.35
25 26.9 3.0 4.4 16 25 26.2
26 27.9 3.0 4.6 16 26 27.2
28 30.1 ±0.25 3.0 4.6 18 28 29.4
30 32.1 3.0 4.7 20 30 31.4 ＋0.25
0
32 34.4 3.5 5.2 2.5 21 32 33.7
35 37.8 1.5 3.5 5.2 24 35 37.0 1.65 2
36 38.8 3.5 5.2 25 36 38.0
37 39.8 3.5 5.2 26 37 39.0
38 40.8 4.0 5.3 27 38 40.0
40 43.5 ±0.4 1.75 ±0.07 4.0 5.7 28 40 42.5 1.90
42 45.5 4.0 5.8 30 42 44.5
45 48.5 4.5 5.9 33 45 47.5
47 50.5 ±0.45 4.5 6.1 34 47 49.5
48 51.5 4.5 6.2 35 48 50.5 ＋0.30
50 54.2 2 4.5 6.5 37 50 53.0 2.2
52 56.2 5.1 6.5 39 52 55.0
55 59.2 5.1 6.5 41 55 58.0
56 60.2 5.1 6.6 42 56 59.0
60 64.2 5.5 6.8 46 60 63.0
62 66.2 5.5 6.9 48 62 65.0
63 67.2 5.5 6.9 49 63 66.0
65 69.2 2.5 ±0.08 5.5 7.0 50 65 68.0 2.7 2.5
68 72.5 6.0 7.4 53 68 71.0
70 74.5 6.0 7.4 55 70 73.0
72 76.5 6.6 7.4 57 72 75.0
75 79.5 6.6 7.8 60 75 78.0
80 85.5 ±0.55 7.0 8.0 64 80 83.5 ＋0.35
85 90.5 3 ±0.09 7.0 8.0 3 69 85 88.5 3.2 ＋0.18
0 		3
90 95.5 7.6 8.3 73 90 93.5
95 100.5 8.0 8.5 77 95 98.5
100 105.5 8.3 8.8 82 100 103.5
105 112.0 4 8.9 9.1 86 105 109.0 ＋0.54 4.2 4
110 117.0 8.9 10.2 89 110 114.0
112 119.0 8.9 10.2 90 112 116.0
115 122.0 ±0.65 9.5 10.2 94 115 119.0
120 127.0 9.5 10.7 98 120 124.0 ＋0.63
125 132.0 10.0 10.7 3.5 103 125 129.0

・b is the maximum width of the ring portion of the retaining ring.

・The minimum width of the ring portion of the retaining ring is preferably larger than thickness t. It is also preferable that d4 be d4 = d3 − (1.4 to 1.5)b.

・Dimensions for applicable holes are indicated as reference to recommended dimensions.

・For nominal diameter, column 1 is to be given preference, but column 2 may also be used as necessary.

・The standard dimension of 1.5 for thickness may be 1.6 where agreed between supplying and receiving parties. However, in this instance, m is 1.75.

・The standard dimension of 1.75 for thickness may be 1.8 where agreed between supplying and receiving parties. However, in this instance, m is 1.95.

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