RHP7028CTSULP4Super Precision Angular Contact Ball Bearing – 140 mm ID, 210 mm OD, 33 mm Width, Open, 15°, Light Preload, ABEC 7, Universally Ground Single

Product Description

What this part is

RHP 7028CTSULP4 super precision angular contact ball bearing. Bore: 140 mm. Outside Diameter: 210 mm. Width: 33 mm. Series: 70, light section. Single row of balls, 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: single bearing, universally ground. The same bearing is designated 7028-C-T-SUL-P4, B7028X2TAULEP7 and 2MM9128WI-CR-SUL.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity. Dynamic Load Rating: 117 kN. Static Load Rating: 137 kN. Limiting Speed: 7,500 rpm. Light preload runs coolest and fastest of the three preload grades. P4 tolerance holds bore, outside diameter and running accuracy to super precision limits, giving lower runout at the spindle nose.

Quantity and configuration

Unit Quantity: 1 Pc. Universally ground faces allow this bearing to be stacked with another of the same designation back-to-back, face-to-face or in tandem, with the ground offsets setting the preload when the rings are clamped.

Fitting notes

Preloaded bearings 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, single universal: Fafnir 2MM9128WI-CR-SUL, NSK 7028CTRSULP4, FAG B7028C.T.P4S.UL. Related size: SKF 7028 CDGA/P4A, same envelope and angle, SKF light-preload universal matching. Related size: 7028A5 at 25°, same envelope, different thrust and speed capability.