RHP7212TDULP4Duplex Angular Contact Ball Bearing Pair – 60 mm ID, 110 mm OD, 22 mm Width, Open, Light Preload, ABEC 7

Product Description

What this part is

RHP 7212TDULP4 angular contact ball bearing, supplied as a duplex universally ground pair. ISO dimension series 02. Bore: 60 mm. Outside Diameter: 110 mm. Overall Width: 22 mm per bearing. Precision Class: P4 (ABEC 7, RHP EP7). Cage Material: Phenolic. Cage Type: Machined, outer-ring land-riding. Preload: Light. Mounting Arrangement: Duplex universal. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1 per bearing. Rolling Elements: Balls. Bearing Material: Chrome bearing steel, SAE 52100. Series: 7200. Country of Origin: United Kingdom.

Decoding the designation

7212 gives the ISO series 02 envelope at a 60 mm bore. T is the laminated phenolic cage. DUL is the grouping and preload: DU for a duplex universally ground set, L for light preload. P4 is the precision grade, ABEC 7, which RHP also writes as EP7. The carton carries the alternative forms 7212-T-DU-EP7, 7212B and the Fafnir cross MM212-WI-CR-DUL.

What these specs mean in practice

Item Weight: 1.75 lb for the pair. Maximum Operating Temperature: 120 °C. Minimum Operating Temperature: -30 °C. Lubricant: grease or oil. The series 02 section is the heavier of the two common angular contact sections at a given bore, so it carries more load than a series 10 bearing on the same shaft. P4 tolerances hold bore and raceway runout to a few microns, which is what gives closer shaft location and lower running vibration than a standard-class bearing. The laminated phenolic cage is outer-ring guided, light and quiet, and it is what sets the 120 °C ceiling.

Quantity and configuration

Unit Quantity: 2 Pcs. DU marks a duplex universally ground set: both bearings have inner and outer rings of the same width with pre-adjusted faces, so the pair mounts back-to-back, face-to-face or in tandem and reaches the rated light preload when clamped, with no ground spacer.

Fitting notes

Bore Type: Straight, for an interference fit on the shaft with the inner ring rotating. Shaft Abutment Diameter: 69 mm maximum. Housing Abutment Diameters: 101 mm minimum and 104 mm maximum. Bearing Fillet Radius: 1.5 mm minimum on the bore side, 1.0 mm minimum on the outside diameter. Pitch circle diameter for oil/air lubrication jets: 79.0 mm. Internal Volume: 35.1 cm³ per bearing, which sets the grease charge. Harmonization Code: 8482.10.50.

Interchange guidance

Cross-Reference 1: 7212-T-DU-EP7 (the same bearing in RHP’s EP class notation). Cross-Reference 2: SKF 7212 CD/P4ADGA (related size, same envelope at a 15° contact angle). Cross-Reference 3: Fafnir 2MM212WI-DUL (related size, same envelope at a 15° contact angle). Cross-Reference 4: 7212B (related designation, same envelope at a 40° contact angle). Searchable designation forms: 7212TDULP4, 7212-T-DUL-P4, 7212 T DUL P4, 7212TDUEP7, 7212B, MM212WICRDUL and 2MM212WI-DUL.