RHP7002CTDUMP4Angular Contact Ball Bearing – 15 mm ID, 32 mm OD, 9 mm Width, 15° Contact Angle, ABEC 7 / P4, Medium Preload, Open.

Product Description

What this part is

RHP 7002CTDUMP4-1/2PR super precision single-row angular contact ball bearing. Bore Diameter: 15 mm. Outside Diameter: 32 mm. Overall Width: 9 mm. Contact Angle: 15°. Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Series: 7000. Base Number: 7002.

Decoding the designation

7 — single-row angular contact ball bearing.

0 — RHP dimension series 0, ISO series 10.

02 — bore code 02, a 15 mm bore.

C — 15° contact angle. The carton’s B-series code X2, the Fafnir number 2MM9102WI and the FAG and SKF cross-numbers B7002-C-T-P4S and 7002 CD/P4A all state the same 15°.

T — machined cage in laminated phenolic resin, outer-ring guided.

DU — duplex universal. The factory set is two bearings ground together with the bores and outside diameters size-graded to share load evenly.

M — medium preload. Preload: Medium (M). The SKF cross-number on the same carton carries DGB, SKF’s own medium preload code.

P4 — RHP precision grade P4. Precision Class: ABEC 7 / P4. The carton’s EP7 marking is the British Standards form of the same grade.

-1/2PR — half a pair. Unit Quantity: 1 Pc.

What these specs mean in practice

Dynamic Load Rating: 6,250 N. Static Load Rating: 3,400 N. Limiting Speed: 44,200 rpm grease; 71,400 rpm oil. Cage Material: Phenolic. Cage Type: Machined, outer-ring guided. Bearing Material: Bearing steel, SAE 52100 equivalent, through hardened and heat treated for dimensional stability. Lubricant: Grease or oil. Max temp: 120 °C.

The oil figure assumes an oil/air system delivering accurately metered oil in an airstream; the grease figure assumes a premium high-speed synthetic grease. Small bores run fast: at 15 mm this is one of the highest speed ratings in the RHP super precision range. Mounted as a back-to-back or face-to-face pair the medium setting gives an axial preload of 69 N and an axial stiffness of 29 N/µm, and the pair speed falls to 60 per cent of the single-bearing figure. At P4 the assembled inner ring runs within 2.5 µm radial runout and the outer ring within 5 µm.

Mounting data

Shaft abutment diameter d1: 17.5 mm minimum. Abutment diameter D1: 29.5 mm maximum. Abutment diameter D2: 30.8 mm maximum. Chamfer dimension r: 0.3 mm minimum. Chamfer dimension r1: 0.15 mm minimum. Effective load centre a: 7.6 mm. Internal free volume: 1.4 cm³. Pitch circle diameter for lubrication jets: 21.3 mm. Item Weight: 0.031 kg (0.07 lb). Recommended shaft fit at P4 on a 15 mm seat: +2 to −2 µm. Recommended housing fit for a locating bearing on a 32 mm bore: +5 to 0 µm.

Quantity and configuration

Unit Quantity: 1 Pc. Mounting Arrangement: one bearing from a factory-matched duplex pair, universally face-ground. Inner and outer rings are the same width with the face steps pre-adjusted at manufacture, so it pairs with a second universally ground bearing back-to-back, face-to-face or in tandem without custom-ground spacers. The ring is marked at the high point of radial runout by a burnished spot on the inner ring face and a V line on the outer ring outside diameter.

Interchange guidance

Same envelope, same 15° contact angle and same P4 class: SKF 7002 CD/P4ADGB, FAG B7002-C-T-P4S, NSK 7002CTRDUMP4, NTN 7002C/GNP4, Koyo 7002C/GNP4, Timken/Fafnir 2MM9102WICRDUM, SNR 7002CVUJ84. The SKF and FAG numbers and the Fafnir number are marked on this carton alongside the RHP designation.