Machinery's Handbook, 31st Edition
RETAINING RINGS
1919
Table 15. Dimensions of Inch Series External Retaining Rings MS3215
W
A B
GD
E
T
Ring
Groove
a Static Thrust Load (lb)
Shaft Diameter D
Free Dia. A
Thickness T
Diameter B
Diameter G
Width W 0.018 0.018 0.029 0.029 0.029 0.029 0.029 0.039 0.039 0.039 0.046 0.046
Margin E 0.020 0.030 0.040
Ring
Groove
0.094 0.125 0.156 0.188 0.219 0.250 0.312 0.312 0.375 0.438 0.500 0.562
0.072 0.093 0.113 0.143 0.182 0.204 0.242 0.242 0.292 0.332 0.385 0.430
0.015 0.015 0.025 0.025 0.025 0.025 0.025 0.035 0.035 0.035 0.042 0.042
0.206 0.270 0.335 0.375 0.446 0.516 0.588 0.588 0.660 0.746 0.810 0.870
0.074 0.095 0.116 0.147 0.188 0.210 0.250 0.250 0.303 0.343 0.396 0.437
55 75
13 25 40 50 50 75
150 180 215 250 300 420 520 600 820 930
0.040 0.031 0.040 0.062 0.062 0.072 0.096 0.104 0.124
135 135 190 285 360 480
a Thrust Load Safety Factors: Ring, 3; groove, 2. Source: Industrial Retaining Rings, 1200 Series. All dimensions are in inches. Depth of groove d = ( D − G )/2. Standard material: carbon spring steel (SAE 1060-1090). Thickness indicated is for unplated rings; for most plated rings the maximum thickness will not exceed the minimum groove width (W) minus 0.0002 inch. Groove Maximum Bottom Radii: For shaft sizes 0.250 and smaller, 0.005 inch; for sizes 0.312 through 0.438, 0.010 inch; for sizes 0.500 and 0.562, 0.015 inch. Ring Free Diameter Tolerances: For shaft sizes 0.094 through 0.156, +0.001, − 0.003; for sizes 0.188 through 0.312, ± 0.003; for sizes 0.375 through 0.562, ± 0.004. Ring Thickness Tolerances: For all shaft sizes, ± 0.002. Groove Diam eter Tolerances: For shaft sizes 0.094 through 0.188, +0.002, − 0.000; for sizes 0.219 and 0.250, ± 0.002; for sizes 0.312 through 0.562, ± 0.003. Groove Width Tolerances: For shaft sizes 0.094 and 0.125, +0.002, − 0.000; for sizes 0.156 through 0.562, +0.003, − 0.000. Thrust Load Capacity: The thrust load capacities shown in the tables of this section include safety factors. Usually, a safety factor of 2 is used for groove thrust load calcula tions when the load is applied through a retained part and groove with both having sharp corners and where the minimum side clearance exists between the retained part and the shaft or bore. Groove thrust load values in the tables of this section are based on these conditions. A safety factor of 3 is usual for calculations of thrust load capacity based on ring shear. Ideally, the corner of a retained part in contact with a retaining ring should have square corners and contact the ring as closely as possible to the shaft or housing. The tabulated thrust capacities assume that minimum clearances exist between the retained part and shaft or housing, that the groove and retained part have square corners, and that contact between the retained part and the ring occurs close to the shaft or housing. If these conditions apply, the tabulated thrust loads apply. If the application does not meet the previous conditions but the side clearances, radii, and chamfers are less than the maximum total radius or chamfer of Fig. 1 , then the thrust load capacity must be reduced by dividing the tabulated value by 2. The maximum total radius is given by 0.5( b − d ) and the maximum total chamfer by 0.375( b − d ), where b is the radial wall thickness, and d is the groove depth. The recommended maximum total radius or chamfer specifications are
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