S71904 CD/P4AQBCC

These sets of four matched super-precision angular contact ball bearings are available as universally matchable bearings or in preconfigured arrangements.

Sets of four bearings arranged in tandem need to be mounted against a single bearing, or a set of bearings in tandem, to achieve the desired preload. All the other arrangements are available in different preload classes and correct mounting results in preload within a predetermined range, without the need for shims or similar devices. The bore and outside diameters of the bearings are matched to within a maximum of one-third of the permitted diameter tolerance, to provide better load distribution than single universally matchable bearings.

• Very high running accuracy
• High axial and radial stiffness
• High axial and radial load carrying capacity
• Non-contact seals
• Integral sealing prolongs bearing service life

Dimensions

d	20 mm	Bore diameter
D	37 mm	Outside diameter
B	36 mm	Width
d1	25.6 mm	Shoulder diameter of inner ring (large side face)
D4	34.15 mm	Recess diameter outer ring shoulder (small side face)
r1,2	min.0.3 mm	Chamfer dimension
r3,4	min.0.2 mm	Chamfer dimension

Abutment dimensions

da	min.22 mm	Diameter of shaft abutment
da	max.25.1 mm	Diameter of shaft abutment
Db	max.35.6 mm	Diameter of housing abutment
ra	max.0.3 mm	Radius of fillet
rb	max.0.2 mm	Radius of fillet