RHP7017CTSUMP4Super Precision Angular Contact Ball Bearing 85x130x22 mm, 15° Contact Angle, Phenolic Cage, ISO P4 / ABEC 7, Universally Ground Medium Preload

Product Description

What this part is

An RHP 7017CTSUMP4 super-precision single-row angular contact ball bearing for machine-tool spindles. Brand: RHP. Part Number: 7017CTSUMP4. Series: 7000 super-precision spindle series. Base Number: 7017. Bore: 85 mm. Outside Diameter: 130 mm. Overall Width: 22 mm. Contact Angle: 15°. Number Of Rows: 1. Rolling Elements: Balls. Bearing Material: Chrome bearing steel. Cage Type: Machined, ball-guided. Cage Material: Phenolic laminated fabric. Precision Class: ISO P4 / ABEC 7. Preload: Medium (M). Arrangement: SU, single and universally ground. Bore Type: Straight. Closure Type: Open. Dynamic Load Rating: 76.0 kN. Static Load Rating: 58.5 kN. Limiting Speed: 10,700 rpm grease, 16,300 rpm oil-air. Effective Load Centre: 25.4 mm. Permissible Axial Load: 38.0 kN. Item Weight: 0.898 kg (1.98 lb). Design Units: Metric.

Decoding the designation

7017: single-row angular contact ball bearing in the 85 x 130 x 22 mm envelope. C: 15° contact angle in RHP nomenclature. T: phenolic laminated-fabric cage. SUM: single bearing, universally ground, medium preload class. P4: ISO tolerance class 4, equivalent to ABEC 7.

What these specs mean in practice

A 15° contact angle is the high-speed end of the range: low centrifugal ball loading, low heat generation and a high permissible DN value, with less thrust capacity and axial stiffness than a 25° or 40° execution. Medium preload restores stiffness — the set deflects less under cutting load than a light-preload set while running cooler and drawing less power than a heavy one. Universal grinding cuts the ring faces to a controlled offset, so two bearings of this designation clamp up to the same medium preload in DB, DF or DT arrangement without shims or bench measurement. P4 / ABEC 7 controls bore, outside diameter, width and above all radial and axial runout. The phenolic cage is light, self-lubricating and quiet, and is rated for continuous service to 120 °C.

Quantity and configuration

Unit Quantity: 1 Pc. Arrangement / Configuration: SU, single and universally ground, so two of these clamp up into a defined medium-preload pair. The factory-matched medium-preload pair carries the DUM designation.

Interchange guidance

RHP became part of NSK, so the current-nomenclature equivalent is NSK 7017CTRSULP4 / 7017CTYNSUMP4 — NSK C is also 15°, making that a direct match. Other direct 85 x 130 x 22 mm super-precision 15° equivalents: SKF 7017 CD/P4A, FAG B7017-C-T-P4S-UM, NTN 7017CT1P4 and Fafnir / Timken 2MM9117WI. Carried as same-envelope references with the difference named: SKF 7017 ACD/P4A, NSK 7017A5TYNSUMP4 and RHP 7017ETSUMP4 are the same envelope at 25°, and FAG 7017-B-TVP-P4 is the same envelope at 40°. Contact angle and preload class are the two fields that decide a substitution.