FAGB7009CBTP4SDULSuper-Precision Angular Contact Ball Bearing, Matched Pair – Straight Bore, 45 mm ID, 75 mm OD, 16 mm Width, Open, 15° Contact Angle, Light Preload

Product Description

What this part is

A FAG B7009 C B T P4S DUL super-precision angular contact ball bearing set. Bore 45 mm, outside diameter 75 mm, width 16 mm per bearing, 32 mm across the pair. Open on both faces, one row of balls per bearing, fabric-base laminate phenolic cage. Supplied as a factory-matched pair of two bearings.

Decoding the designation

B7009 is Schaeffler’s spindle-bearing series on the ISO 70 light envelope with a 45 mm bore. C sets a 15° contact angle. T is the fabric-base laminate phenolic cage, distinct from the TVP glass-fibre polyamide cages used elsewhere in the FAG range. P4S is the super-precision accuracy class, and DUL marks a universally matchable pair ground for light preload. The carton also carries the Timken Fafnir designation 2MM9109WI CR DUL for the same bearing, where the leading 9 is the ISO 70 series so 9109 is a 7009, 2MM is 15°, and CR is the outer-land-riding phenolic cage.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity, which is what gives this bearing its 20 000 r/min limiting speed. Basic dynamic load rating is 29 kN and basic static load rating 16 kN per bearing. The phenolic cage is light and self-lubricating and sets the 100 °C upper operating limit.

Preload and clearance

Universally matchable rings are ground with offset faces, so clamping them together establishes a defined light preload. Preload takes the place of running clearance, and a radial internal clearance class therefore does not apply.

Quantity and configuration

Two bearings, one matched set, 32 mm total width. Universal matching means the pair mounts back-to-back, face-to-face or in tandem, and further bearings of the same designation stack into the same arrangement.

Fitting notes

Shaft and housing seats are ground to suit the P4S ring tolerances, and the rings are clamped axially against ground abutment faces so the ground offsets set the preload as intended. Ring faces carry the matching marks that fix orientation.

Interchange guidance

Timken Fafnir 2MM9109WI CR DUL is the carton-marked equivalent. SKF 7009 CD/P4ADGA and NSK 7009CTYNDULP4 are the matching 15° light-preload universally matchable pairs from the other super-precision makers. FAG B7009-E-T-P4S-UL shares the envelope on a 25° contact angle, making it a related size rather than a substitution.