Retaining Rings (Internal)
JIS B 2804
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Above Size No.170
Groove Dimension
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The dimension d4 is the minimum diameter of inner periphery when the retaining ring is set in the hole.
d4:CLEARANCE DIAMETER
(JAPANESE INDUSTRIAL STANDARD)
R-PACK
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RTW-rings can be supplied in tape wrapped or banded.
Size No.10 through 48 tape wrapped.
Size No. 50 through 125 tape wrapped or banded.
Unit:mm
Size-No. Ring dimension Ref.
d4 		Groove dimension
d3 t b a do d1 d2 m Ref.n
Basic Tol. Basic Tol. Approx. Approx. Min. Basic Tol. Basic Tol. Min.
RTW- 65 69.2 0.45 2.5 0.08 5.5 7 2.5 50 65 68 ¡Ï0.3
0		 2.7 ¡Ï0.14
0 		2.5

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68 72.5 6 7.4 53 68 71
70 74.5 6 7.4 55 70 73
72 76.5 6.6 7.4 57 72 75
75 79.5 6.6 7.8 60 75 78
78 82.5 0.55 6.6 8 62 78 81 ¡Ï0.35
0
80 85.5 7 8 64 80 83.5
82 87.5 7 8 3 66 82 85.5
85 90.5 3 0.09

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 7 8 69 85 88.5 3.2 ¡Ï0.18
0 		3
88 93.5 7.6 8.2 71 88 91.5
90 95.5 7.6 8.3 73 90 93.5
92 97.5 8 8.3 74 92 95.5
95 100.5 8 8.5 77 95 98.5
98 103.5 8.3 8.7 80 98 101.5
100 105.5 8.3 8.8 82 100 103.5
102 108 4

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 8.9 9 83 102 106 ¡Ï0.54
0 		4.2

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 4
105 112 8.9 9.1 86 105 109
108 115 8.9 9.5 87 108 112
110 117 8.9 10.2 89 110 114
112 119 8.9 10.2 90 112 116
115 122 0.65 9.5 10.2 94 115 119
120 127 9.5 10.7 98 120 124 ¡Ï0.63
0
125 132 10 10.7 3.5 103 125 129
130 137 ¡Ï1.26
¡Ð0.63		 10 10.7 108 130 134 ¡Ï0.2
0		 6
135 142 10.8 11 113 135 139
140 147 10.8 11 118 140 144
145 152 10.8 11 123 145 149
150 158 11.5 11.8 126 150 155 7.5
155 164 11.5 11.8 130 155 160
160 169 12 12.5 134 160 165
165 174.5 12 12.7 139 165 170
170 179.5 12 - 145 170 175
175 184.5 ¡Ï1.44
¡Ð0.72		 12.5 - 149 175 180
180 189.5 13 - 4 153 180 185 ¡Ï0.72
0
185 194.5 13.5 - 157 185 190
190 199.5 13.5 - 162 190 195
195 204.5 13.5 - 167 195 200
200 209.5 14 - 171 200 205
210 222 5 0.15 14 - 181 210 216 5.2 ¡Ï0.25
0 		9
220 232 14 - 191 220 226
230 242 14 - 201 230 236
240 252 ¡Ï1.62
¡Ð0.81		 14 - 211 240 246
250 262 14 - 221 250 256 ¡Ï0.81
0
260 275 16 - 227 260 268 12
270 285 16 - 237 270 278
280 295 16 - 247 280 288
290 305 16 - 257 290 298
300 315 16 - 267 300 308
¡´ Material=Carbon spring steel. Hardness=HRC44~52, Finish=Black phosphate coating (ACP),Zn plating,Chromate dip.
¡´ Material=Stainless spring steel
Note; ¡°mark and size No.130 above are according to our company's specification.
¡³mark is old JIS.