RHP7017CTDULP4Super 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:

Matching 15°, ABEC 7, light-preload, universally ground bearings: Fafnir/Timken 2MM9117WI-CR-DUL, NSK 7017CTRDULP4, SKF 7017 CD/P4ADGB and FAG B7017-C-T-P4S-UL. The 25° forms of this envelope, the medium and heavy preload grades, and the single-universal SUL grind are different bearings, since contact angle and preload class change the stiffness and speed behaviour.