RHP7211CTBSULSuper-Precision Angular Contact Ball Bearing – 55 mm ID, 100 mm OD, 21 mm Width, Open, 15°, Light Preload

Product Description

What this part is

RHP 7211CTBSUL super-precision angular contact ball bearing. Bore: 55 mm. Outside diameter: 100 mm. Width: 21 mm. Series: 7200. Base number: 7211. Single row, open, chrome steel rings and balls. The carton also carries the RHP B-series form B7211X2TULEP1. Searchable forms include 7211CTBSUL, 7211 C TB SUL, 7211-C-TB-SUL, 7211-C-TB-SUL-P0 and B-7211-X2-T-UL-EP1.

Decoding the designation

Contact Angle: 15°. Both carton schemes agree: the C position in the RHP designation and the X2 position in the RHP B-series form. Preload: light, from the SUL position. Arrangement: single universally matchable bearing, so any two pieces of this designation stack in any orientation. Precision Class: Not specified.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity, which is why it is the standard machine tool spindle angle. Ground-in light preload removes shaft play and sets stiffness without shims or spring packs, and it is the preload class chosen where speed matters more than rigidity. The 7211 section — 55 mm bore, 100 mm outside diameter, 21 mm width — is one of the most widely stocked super-precision spindle sizes, so mounting hardware and matching pieces are straightforward to source.

Quantity and configuration

One bearing. Universal matching means it runs as a single bearing or pairs with a second piece of the same designation back-to-back, face-to-face or in tandem, reaching the light preload by clamping the rings.

Fitting notes

Preload is ground into the ring faces, so the rings are clamped solid against the shaft shoulder and the housing shoulder. Because preload is ground in, this bearing carries no radial internal clearance class.

Interchange guidance

The 55 x 100 x 21 mm super-precision section at 15° and light preload is shared with SKF 7211 CDGA/P4A, FAG B7211-C-T-P4S-UL and NSK 7211CTRSULP4, which match on envelope, angle and preload. The 7211 A5 forms are a related size at 25° and carry different thrust and speed figures.