RHP7218CTDULP4Super Precision Angular Contact Ball Bearing – 90 mm ID, 160 mm OD, 30 mm Width, Open, 15°, Light Preload, ABEC 7, Matched Pair

Product Description

What this part is

RHP 7218CTDULP4 super precision angular contact ball bearing. Bore: 90 mm. Outside Diameter: 160 mm. Width: 30 mm per bearing. Series: 72, medium section. Single row of balls per bearing, open on both faces. Rolling Elements: chrome steel balls.

Decoding the designation

Contact Angle: 15°. Cage: machined laminated phenolic, outer-ring guided. Preload: light. Precision Class: P4, equal to ABEC 7 and to RHP class EP7. Configuration: duplex, universally ground. The same bearing is designated 7218-C-T-DUL-P4, B7218X2TDULEP7, 2MM218WI-CR-DUL and 218HDL.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity. The 72 medium section carries a higher load than a 70 light-section bearing on the same bore. Dynamic Load Rating: 114 kN. Static Load Rating: 91.5 kN. Light preload gives the coolest running and the highest speed of the three preload grades. P4 tolerance holds bore, outside diameter and running accuracy to super precision limits.

Quantity and configuration

Unit Quantity: 2 Pcs. Universally ground faces allow the pair to be mounted back-to-back, face-to-face or in tandem, and the ground offsets set the preload when the rings are clamped. Total width of the pair: 60 mm.

Fitting notes

Preloaded sets are supplied without internal clearance, so Internal Clearance is N/A. Clamping is against the ground faces of both rings. Phenolic cages are rated to 120 °C.

Interchange guidance

Same-spec equivalents at 15°, P4, light preload: Fafnir 2MM218WI-CR-DUL, NSK 7218CTRDULP4, FAG B7218C.T.P4S.UL. Related size: SKF 7218 CD/P4ADGA, same envelope and angle, SKF light-preload universal matching. Related size: 7218A5 at 25°, same envelope, different thrust and speed capability.