FAGB7003CB.TPA.P4.DULSuper Precision Angular Contact Ball Bearing Matched Duplex Pair – 17 mm ID, 35 mm OD, 10 mm Width, 15 Degree Contact Angle, Phenolic Cage, Light Preload

Product Description

What this part is:

A matched pair of FAG super-precision angular contact ball bearings, each 17 mm bore by 35 mm outside diameter by 10 mm wide. Bearings in the Schaeffler B7 block are spindle bearings, ground to super-precision running accuracy with the cage and internal geometry chosen for speed. This pair is supplied universally ground with light preload built into the ring faces.

Decoding the designation:

B7003CB.TPA.P4.DUL reads as follows. B7 is the super-precision spindle series and 003 the ISO 70-series size, giving the 17 x 35 x 10 mm envelope. C is a 15° contact angle. TPA is a fabric-base laminate cage located on the outer ring. P4 is the tolerance class, equivalent to ABEC 7. DUL is the arrangement code: D for duplex, U for universally ground, L for light preload.

What these specs mean in practice:

A 15° contact angle favours speed over thrust. It carries less axial load than a 25° bearing of the same envelope and runs faster and cooler, which is why it is the standard angle for high-rpm machine tool and motor spindles. The laminate cage is light, quiet and self-lubricating with a working ceiling near 100 °C. Light preload gives defined ball contact for stiffness and low runout at modest frictional heat. The 70,000 rpm limiting speed is an oil-lubricated figure; grease lubrication runs lower.

Quantity and configuration:

2 Pcs, supplied as a matched duplex pair. Open faces on both sides. The purchase covers the two bearings themselves.

Mounting data:

Universal grinding: the pair may be arranged back-to-back, face-to-face or in tandem, and the light preload is realised in any of the three. Back-to-back is the stiffest arrangement against moment load. Face-to-face is the most tolerant of misalignment. Tandem shares thrust in one direction only.

Interchange guidance:

Crosses at 15° with light preload as a universally ground pair: Timken/Fafnir 2MM9103WI CR DUL, SKF 7003 CD/P4A DGA, and NSK 7003CTYDULP4, which carries a polyamide cage in place of the laminate. A 7003 at the same envelope with an A or E suffix, a steel cage, or medium or heavy preload is a related size, not a substitute, because angle, cage and preload each change the speed and thrust ratings.