Axis Ball Bearing Catalog (PDF) - McGuire Bearing Company

Engineering Section
Housing Fits for Radial Bearings
The ISO Housing Tolerances listed are shown in the tables on pages 48 & 49
Conditions Examples of Application Tolerance Displacement of Outer Ring
Rotating Inner Ring
Loads of all kinds
General bearing applications, railroad axle
bearing
H6¹ Can be displaced
Light and normal loads (P≤ 0.12C) with simple working
conditions
General bearing applications, gear
transmission
H8
Can be displaced
Heat conduction through shaft Drying cylinders G7² Can be displaced
Indeterminate Direction Load*
Light and normal loads (P≤ 0.12C) axial
displacement of outer ring desirable
Electric motors, pumps,
crankshaft bearings
J7
Can usually be displaced
Heavy shock loads Traction motors M7 Cannot be displaced
Normal and heavy loads (P> 0.06C). Axial
displacement of outer ring unnecessary
Electrical motors, pumps, crankshaft
bearings
K7
Cannot usually be displaced
Stationary Inner Ring
Normal and heavy loads (P> 0.06C) Ball bearing wheel hubs, big end bearings. N7 Cannot be displaced
Light and variable loads (P≤ 0.06C) Conveyor rollers, pulleys, tension pulleys M7 Cannot be displaced
Accurate or Quiet Running³
Light Loads Small electric motors J6² Can be displaced
*Variable external loads, shock loads, and vibratory and unbalanced loads in high-speed machinery cannot be accurately described and are classified as “indeterminate
direction load”
¹For large bearings (D > 250mm) and temperature difference between outer ring and housing > 10°C, use G7.
²For large bearings (D > 250mm) and temperature difference between outer ring and housing > 10°C, use F7.
³Not applicable to high precision bearings
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