RHPSuper Precision Angular Contact Ball Bearing 85 x 130 x 22 mm 15 Degree ABEC 7 Light Preload Phenolic Cage

Product Description

What this part is

An RHP 7017-C-T-DUL-P4 super precision single-row angular contact ball bearing, 85 mm bore, 130 mm outside diameter, 22 mm width, with a phenolic cage. The faces are duplex universally ground, so two pieces set light preload against each other with no shims or spacers. RHP super-precision bearings are now built under NSK Europe.

Decoding the designation

7017 denotes the ISO 70 series envelope, 85 x 130 x 22 mm. C denotes a 15° contact angle in the RHP scheme. T denotes a phenolic, cotton-fabric reinforced resin cage. DUL denotes a duplex universal grind at light preload. P4 denotes ISO class 4, equivalent to ABEC 7. The -1/2PR suffix denotes half a pair, one bearing.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness, where a 25° bearing of the same envelope trades speed for axial capacity. The phenolic cage is light, runs well under oil mist or oil-air lubrication and is quiet at speed; its continuous ceiling sits near 120 °C. Light preload holds heat generation down and keeps the speed limit high compared with medium or heavy preload.

Published specifications

Bore: 85 mm. Outside diameter: 130 mm. Width: 22 mm. Contact angle: 15°. Precision class: P4, equivalent to ABEC 7. Preload: light, duplex universal grind. Cage: phenolic, outer-ring land riding. One row of balls, open on both faces.

Quantity and configuration

1 Pc, one half of a DUL pair. A single-row angular contact bearing carries thrust in one direction; two pieces mounted back to back or face to face locate the shaft axially in both directions and realise the light preload as ground.

Fitting notes

The universal grind mark on the outer ring face sets the orientation: marks together gives face-to-face, marks apart gives back-to-back. Mounting heat is held within the phenolic cage limit, and the bore and housing seat are gauged before assembly so that the ground preload survives the fitted interference.

Interchange guidance

Same-spec 15° ABEC 7 light-preload equivalents are the Fafnir/Timken 2MM9117WI-CR-DUL, NSK 7017CTRDULP4, SKF 7017 CD/P4ADGA and FAG B7017C.T.P4S.UL. The 25° forms of this envelope, the medium and heavy preload grades, and the single-universal SUL grind are related sizes rather than interchanges, since contact angle and preload class change the stiffness and speed behaviour.