Radial Bearing Housing Bore Tolerances
Operating conditions | Assembly conditions | Housing | Examples of mounting | Tolerance |
circumferential loading of outer ring |
high shock loading | outer ring is not sliding | one-part | wheel hubs, connecting rod bearing | P7 |
ordinary and high loading | pulleys, bearing of crankshafts | N7 |
small and variable load | transport and tightening pulleys | M7 |
indeterminate way of load |
high shock load | outer ring non-sliding | one-part | traction motors | M7 |
high and ordinary load | outer ring non-sliding from the right | pump electrical motors, crankshafts | K7 |
ordinary and small load | outer ring sliding from the right | pump electrical motors, fans | J7 |
precision mountings |
ordinary and small loading | outer ring non-slid. from the right, outer ring sliding, outer ring easily sliding | one-part | bearings for cutting machines | K6 |
ball bearing for grinding spindles | J6 |
small electric motors | H6 |
point loading of outer ring |
high ordinary and small loading | outer ring is easily sliding | 1-2 parts | common machinery, axle bear. | H8 |
two parts | transmission shaftings | H8 |
heat supply through shaft | 1 - 2 parts | great electrical motors with spherical roller bearings | G7 |
Note: Loading is small for C / P > 15, common for C / P = 7 - 15, high for C / P < 7.