272 TECHNICAL INFORMATION 3d 4d 0d a b t 5 m 1 2 d d d n 1. Retaining Rings-C Type-External The hole with diameter d0 should be so positioned to protrude out of the groove when the retaining ring is inserted in the shaft. Note(1): Priority should be given to values other than included in ( ). A value in ( ) may be used if necessary. Note(2): For thickness (t) = 1.6mm, the value of 1.5mm may be substituted for on the right side of the formula, for the time being. In this case, m must be 1.65mm. Reference: 1. The minimum width of the ring of the retaining ring should be less than the plate thickness t. 2. The recommended dimensions of the applicable shaft are given here for reference. 3. d4 (mm) should preferably be equal to d4=d3+(1.4~1.5)b. Reference: The thickness t, conforms to the Japan Spring Manufactures Association Standard, JSMA No. 6-1976 (steel belt for a spring). d5 is the max. outer diameter when the retaining ring is fitted onto the shaft. Unit: mm Retaining Rings-C Type-External Nominal(1) Retaining Rings Applicable Shaft (Reference) d3 t b a d0 d5 d1 d2 m n Reference Dimension Tolerance Reference Dimension Tolerance (Approx.) (Approx.) (Min.) Reference Dimension Tolerance Reference Dimension Tolerance (Min.) 10 9.3 ±0.15 1 ±0.05 1.6 3 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 (13) 12 1.8 3.3 20 13 12.4 14 12.9 2 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 1.35 (19) 17.5 2.7 3.8 2 27 19 18 20 18.5 ±0.2 2.7 3.9 28 20 19 0 − 0.21 (21) 19.5 2.7 4 30 21 20 22 20.5 2.7 4.1 31 22 21 (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 1.6(2) 3.1 4.6 38 28 26.6 1.75 (29) 26.9 3.5 4.7 39 29 27.6 30 27.9 3.5 4.8 40 30 28.6 32 29.6 3.5 5 2.5 43 32 30.3 0 − 0.25 (34) 31.5 ±0.25 4 5.3 45 34 32.3 35 32.2 4 5.4 46 35 33 (36) 33.2 1.8 ±0.07 4 5.4 47 36 34 1.95 2 (38) 35.2 4.5 5.6 50 38 36 40 37 ±0.4 4.5 5.8 53 40 38 (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 6.7 64 50 47 2.2 (52) 47.8 5 6.8 66 52 49 55 50.8 ±0.45 5 7 70 55 52 0 − 0.3 (56) 51.8 5 7 71 56 53 (58) 53.8 5.5 7.1 73 58 55 60 55.8 5.5 7.2 75 60 57 (62) 57.8 5.5 7.2 77 62 59 (63) 58.8 5.5 7.3 78 63 60 65 60.8 2.5 ±0.08 6.4 7.4 81 65 62 2.7 2.5 (68) 63.5 6.4 7.8 84 68 65 70 65.5 6.4 7.8 86 70 67 (72) 67.5 7 7.9 88 72 69 75 70.5 7 7.9 92 75 72 (78) 73.5 7.4 8.1 95 78 75 80 74.5 7.4 8.2 97 80 76.5 GeneralTechnical Information Retaining Rings CType
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