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.