RHP7212CTDULP4-1/2PRSuper Precision Angular Contact Ball Bearing 60x110x22 mm, 15° Contact Angle, Light Preload, ABEC 7, Half of a Duplex Pair

Product Description

What this part is

A single super-precision angular contact ball bearing in the 60 mm bore × 110 mm outside diameter × 22 mm width envelope, the ISO 7212 size. Single row, machined cage, universally ground as one half of a duplex pair.

Decoding the designation

This part carries two designations. In 7212CTDULP4-1/2PR the C is a 15° contact angle, T the machined phenolic cage, DUL duplex universal with light preload, P4 the class equivalent to ABEC 7, and the trailing -1/2PR the sale unit: half of a pair, which is one bearing. In the B-series form 7212X2TADUEP7 the X2 independently gives the 15° angle and EP7 independently gives the P4 class.

Quantity and configuration

1 Pc. One bearing, universally ground to the light preload class as one half of a duplex pair. A complete duplex light-preload set is made up of two such bearings.

What these specs mean in practice

A 15° contact angle carries more radial load and runs faster than a 25° or 40° bearing of the same size, and carries correspondingly less thrust. Light preload removes internal play and fixes the contact angle while adding the least heat of the three preload grades, keeping axial position and runout repeatable without penalising speed. The phenolic cage is light, holds an oil film well and sets the temperature ceiling at roughly 120 °C, which governs ahead of the steel.

Thrust direction

A single-row angular contact bearing carries radial load together with thrust in one direction only. Axial location in both directions comes from mounting a second bearing opposed to this one.

Interchange guidance

RHP super-precision designations cross-reference directly to NSK, which acquired RHP and continued the numbering. The same-spec equivalents are NSK 7212CTSULP4 and Timken 2MM212WI CR UL. A 7212E at 25°, a plain 7212 at 40°, a medium or heavy preload version, or a P5 or P6 class version shares this envelope but is a related size rather than a substitution.