Machinery's Handbook, 31st Edition
Ball and Roller Bearings 2485 Table 28. Values of X and Y for Computing Equivalent Radial Load P of Radial and Angular Contact Ball Bearings
Single Row Bearings b
Double Row Bearings
F
F F e r a ≤
F
Table Entering Factors a
Contact Angle, α
r a >
r a >
e
e
F
F
RADIAL CONTACT GROOVE BEARINGS
F a / iZD 2
Metric Units
Inch Units
F a / C o
e
X
Y
X
Y
X
Y
0.014 0.172 0.028 0.345 0.056 0.689 0.084 1.03 0.11 1.38 0.17 2.07 0.28 3.45 0.42 5.17 0.56 6.89 0.014 0.172 0.028 0.345 0.056 0.689 0.085 1.03 0.11 1.38 0.17 2.07 0.28 3.45 0.42 5.17 iF a / C o 0.56 6.89 0.014 0.172 0.029 0.345 0.057 0.689 0.086 1.03 0.11 1.38 0.17 2.07 0.29 3.45 0.43 5.17 0.57 6.89 0.015 0.172 0.029 0.345 0.058 0.689 0.087 1.03 0.12 1.38 0.17 2.07 0.29 3.45 0.44 5.17 0.58 6.89 … … … … … … … … … …
25 50
0.19 0.22 0.26 0.28 0.30 0.34 0.38 0.42 0.44 0.23 0.26 0.30 0.34 0.36 0.40 0.45 0.50 0.52 0.29 0.32 0.36 0.38 0.40 0.44 0.49 e 0.54 0.54 0.38 0.40 0.43 0.46 0.47 0.50 0.55 0.56 0.56
2.30 1.99 1.71 1.56 1.45 1.31 1.15 1.04 1.00
2.30 1.99 1.71 1.55 1.45 1.31 1.15 1.04 1.00 3.74 3.23 2.78 2.52 2.36 2.13 1.87 1.69 Y 1.63 3.06 2.78 2.47 2.20 2.18 2.00 1.79 1.64 1.63 2.39 2.28 2.11 2.00 1.93 1.82 1.66 1.63 1.63 1.63 1.41 1.24 1.07 0.98
100 150 200 300
0.56
1
0
0.56
0 °
500 750 1000
ANGULAR CONTACT GROOVE BEARINGS
F a / ZD 2
Metric Units
Inch Units
X
Y
X
Y
X
25 50
2.78 2.40 2.07 1.87 1.75 1.58 1.39 1.26 1.21 2.18 1.98 1.76 1.63 1.55 1.42 1.27 1.17 1.16 1.65 1.57 1.46 1.38 1.34 1.26 1.14 1.12 1.12 1.09 0.92 0.78 0.66 0.55
For this type use the X , Y , and e values applicable to single row radial contact bearings
100 150 200 300
1
0.78
5 °
500 750 1000
25 50
1.88 1.71 1.52 1.41 1.34 1.23 1.10 1.01 1.00 1.47 1.40 1.30 1.23 1.19 1.12 1.02 1.00 1.00 1.00 0.87 0.76 0.66 0.57
100 150 200 300
0.46
1
0.75
10 °
500 750 1000
25 50
100 150 200 300
0.44
1
0.72
15 °
500 750 1000
20 ° 25 ° 30 ° 35 ° 40 °
… 0.57 … 0.68 … 0.80 … 0.95 … 1.14
0.43 0.41 0.39 0.37 0.35
1 1 1 1 1
0.70 0.67 0.63 0.60 0.57
Self-aligning Ball Bearings
0.40 0.4 cot α
1 0.42 cot α
0.65 0.65 cot α
1.5 tan α
a Symbol definitions are given on the following page. b For single row bearings when F a /F r ≤ e, use X = 1, Y = 0. Two similar, single row, angular con- tact ball bearings mounted face-to-face or back-to-back are considered as one double row, angu- lar contact bearing. Values of X, Y , and e for a load or contact angle other than shown are obtained by linear interpola tion.Values of X, Y, and e do not apply to filling slot bearings for applications in which ball-race - way contact areas project substantially into the filling slot under load. Symbol Definitions: F a is the applied axial load in newtons (pounds); C o is the static load rating in newtons (pounds) of
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