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 super-precision angular contact ball bearing in the 60 mm bore by 110 mm outside diameter by 22 mm width envelope, the ISO 7212 size. Bearing type: Super-precision angular contact ball bearing, single row. Number of rows: 1. Bore diameter d: 60 mm (2.3622 in). Outside diameter D: 110 mm (4.3307 in). Width B: 22 mm (0.8661 in), the single-bearing width. Mass: 0.779 kg (1.717 lb) per bearing.

Quantity and configuration

Unit quantity: 1 Pc. One bearing from a factory-matched universally-ground duplex pair. Arrangement: universally ground, so any two bearings of this designation and preload class stack back-to-back, face-to-face or in tandem and reach the specified light preload as ground. Every rating below is the per-bearing figure.

Decoding the designation

Series: 7212 (ISO dimension series 02). Contact angle: 15 degrees (C). Cage type: machined laminated phenolic, outer ring guided (T). Mounting: DU, universally ground duplex. Preload: Light (L). Precision class: P4 (ISO Class 4); ABEC 7. Sale unit: -1/2PR, one bearing. The B-series form 7212X2TADUEP7 gives the same data independently, X2 for the 15 degree angle and EP7 for the P4 class.

Ratings and speeds

Basic dynamic radial load rating Cr: 64,000 N (64.0 kN). Basic static radial load rating C0r: 49,000 N (49.0 kN). Limiting speed: 20,700 rpm oil/air; 12,800 rpm grease. Mounted as a back-to-back light-preload pair the corresponding figures are 16,560 rpm oil/air and 10,240 rpm grease. Maximum operating temperature: 120 degrees C. The bearing is preload-set at manufacture rather than clearance-set.

Mounting data

Effective load centre a: 22.4 mm. Shaft abutment diameter d1 min: 69 mm. Housing abutment diameter D1 max: 101 mm. Outer ring abutment D2 max: 104 mm. Fillet radius r min: 1.5 mm. Fillet radius r1 min: 1.0 mm. Internal volume: 35.1 cm3. Pitch circle diameter of lubrication jets: 79.0 mm. Rings and balls: carbon chrome bearing steel to BS970 534A99/535A99 or SAE 52100. Seal type: open. Snap ring included: No.

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.

Cross-references

RHP super-precision designations carry over to NSK, which acquired RHP and continued the numbering. Cross-references: NSK 7212CTSULP4 and Timken 2MM212WI CR UL. MPN variants: 7212CTDULP4-1/2PR, 7212CTDULP4, 7212-C-T-DUL-P4, 7212 C T DUL P4, 7212C.