No Distinction

• This arrangement is widely used since it can withstand heavy loads and shock loads.
• The back-to-back arrangement is especially good when the distance between bearings is short and moment loads are applied.
• Front-to-front mounting makes mounting easier when interference is necessary for the inner ring. In general, this arrangement is good when there is mounting error.
• To use this arrangement with a preload, attention must be paid to the amount of preload and clearance adjustment.
• Applications: Pinion shafts of automotive differential gears, automotive front and rear axles, worm gear reducers

• This is used at high speeds when radial loads are not so heavy and axial loads are relatively heavy.
• Preloading this arrangement provides good shaft rigidity.
• For moment loads, back-to-back mounting is better than front-to-front mounting.
• Application: Grinding wheel shafts

• This can withstand heavy loads and shock loads.
• It can be used if interference is necessary for both the inner and outer rings.
• Care must be taken so the axial clearance doesn't become too small during running in.
• NF type + NF type mounting is also possible.
• Applications: Final reduction gears of construction machines

• Sometimes a spring is used on the side of the outer ring of one bearing.
• Applications: Small electric motors, small speed reducers, small pumps