Machinery's Handbook, 31st Edition
RETAINING RINGS 1905 Table 6. American National Standard Metric E-Type External Series 3CM1 Retaining Rings.—Checking and Performance Data ANSI/ASME B27.7-1977 (R2017)
R max
C 2
Max. Allowable Radius of Retained Part
Ch max
Ring Seated in Groove
Max. Allowable Chamfer of Retained Part
Clearance Diameter
Ring Series and Size No.
Maximum Allowable Corner Radii and Chamfers
Ring in Groove
Allowable Assembly Speed a
Allowable Thrust Loads Sharp Corner Abutment
R max
Ch max
…
3CM1
P r b kN 0.06 0.13
P g c kN 0.02 0.09 0.17 0.3 0.4 0.6
C 2
No.
mm 2.2 4.3 6.0 7.6 8.9 11.5 14.0 15.1 16.5 17.5 18.0 19.3 21.0 23.5 24.5 27.9 30.7 33.7 37.9
mm 0.4 0.8 1.1 1.6 1.6 1.6 1.6
mm 0.25 0.5 0.7
rpm
40 000 40 000 34 000 31 000 27 000 25 000 23 000 21 500 19 500 18 000 16 500 15 000 13 000 11 500 10 000 9 000 8 000 7 000 5 000
− 1 − 2 − 3 − 4 − 5 − 6 − 7 − 8
0.3 0.7 0.9 1.1 1.2 1.4 3.0 3.4 3.7 4.9 5.4 6.2 6.6 8.7 9.8
1.2 1.2 1.2 1.2 1.3 1.3 1.3 1.3 1.4 1.5 1.5 1.5 1.6 1.7 1.7 1.9
0.8 1.0 1.3 1.6 1.9 2.3 2.9 4.0 4.5 5.4 6.5 8.1
1.7 1.7 1.7 1.7 1.9 2.0 2.0 2.0 2.1 2.2 2.2 2.4
− 9 − 10 − 11 − 12 − 13 − 15 − 16 − 18 − 20 − 22 − 25
10.8 12.2
10.1
a These values have been calculated for steel rings. b These values apply to rings made from SAE 1060-1090 steels and PH 15-7 Mo stainless steel used on shafts hardened to 50 RC minimum, with the exception of size − 1 which is supplied in beryllium copper only. Values for other sizes made from beryllium copper can be calculated by multiplying the listed values by 0.75. The values listed include a safety factor of 4. c These values apply to all standard rings used on low carbon steel shafts. They include a safety factor of 2. Maximum allowable assembly loads with R max or Ch max are as follows: Ring Size No. Maximum Allowable Load, kN Ring Size No. Maximum Allowable Load, kN Ring Size No. Maximum Allowable Load, kN − 1 0.06 − 8 1.4 − 16 6.6 − 2 0.13 − 9 3.0 − 18 8.7 − 3 0.3 − 10 3.4 − 20 9.8 − 4 0.7 − 11 3.7 − 22 10.8 − 5 0.9 − 12 4.9 − 25 12.2 − 6 1.1 − 13 5.4 … … − 7 1.2 − 15 6.2 … … Source: Appendix to American National Standard ANSI/ASME B27.7-1977 (R2017).
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