RHP7012CTSULP4Super Precision Angular Contact Ball Bearing 60x95x18 mm 15° ABEC 7 Light Preload

Product Description

What this part is

RHP 7012CTSULP4 single-row super-precision angular contact ball bearing. Bore: 60 mm. Outside Diameter: 95 mm. Overall Width: 18 mm. Contact Angle: 15°. Precision Class: P4, ISO Class 4, ABEC 7, RHP class code EP7. Cage Material: laminated phenolic resin. Cage Type: machined, outer-ring guided. Closure Type: open on both faces. Rolling Elements: carbon chrome bearing steel balls. Series: RHP 70, ISO dimension series 10. Number Of Rows: 1.

Decoding the designation

Type 7: single-row angular contact ball bearing. Dimension series 0: ISO series 10. Bore code 12: 60 mm bore. Contact angle C: 15°. Cage T: laminated phenolic resin, outer ring guided. Grouping SU: single universal. Preload L: light. Precision grade P4: ISO Class 4, ABEC 7, British Standard EP7. The carton also carries B7012X2TADUEP7, in which X2 is 15° and EP7 is ABEC 7, and the Fafnir-scheme number 2MM9112WI-CR, in which 2MM is 15° and CR is a phenolic outer-land-riding cage.

Load ratings and speed

Dynamic Load Rating (Cr): 35.0 kN. Static Load Rating (C0r): 30.5 kN. Limiting Speed, oil/air lubrication: 23,000 rev/min. Limiting Speed, grease lubrication: 14,200 rev/min. Those figures apply to a single bearing under a spring preload with the inner ring rotating. A back-to-back light-preload pair takes a 0.80 speed factor, a set of three 0.65 and a set of four 0.60. A face-to-face arrangement takes a further 50 per cent reduction. A spring-loaded tandem pair takes 0.95.

What these specs mean in practice

A 15° contact angle is the speed-biased choice in this family. The shallow load line keeps ball centrifugal and gyroscopic effects low, so the bearing reaches a higher limiting speed and runs cooler than a 25° execution on the same envelope, in exchange for axial capacity and axial stiffness.

Light preload adds the least friction heat of the four preload grades. Axial Preload, light grade, as a paired set: 200 N. Axial Stiffness, light grade, as a paired set: 70 N per micrometre. Preload removes internal play, fixes the contact angle and makes axial position and runout repeatable. The bearing is preload-set at manufacture rather than clearance-set.

The laminated phenolic resin cage riding on the outer ring land is the high-speed cage arrangement. Phenolic is light, so cage inertia and ball-pocket loads stay low, and it holds an oil film well. Land guidance keeps the cage running true at speed. Maximum Operating Temperature: 120 °C, set by the phenolic. P4 holds bore, outside diameter, width and running accuracy to single-digit micron limits.

Quantity and configuration

Unit Quantity: 1 Pc. Arrangement: single universal (SU). Universal face control means the inner and outer rings are the same width and the face positions are adjusted at manufacture, so two pieces of this designation mount back-to-back or face-to-face at the same preload value with no measured spacers. Mounted in tandem they share load equally.

Thrust direction

A single-row angular contact ball bearing carries thrust in one direction. Axial load in the opposite direction is taken by a second bearing opposing this one, or by another element in the shaft stack.

Mounting data

Inner ring abutment diameter, d1 min: 67 mm. Outer ring abutment diameters: D1 max 88 mm, D2 max 90 mm. Chamfer dimensions: r min 1.1 mm, r1 min 0.6 mm. Effective Load Centre (a): 19.4 mm. Internal free volume: 18.0 cm³. PCD of lubrication jets: 72.5 mm. Mass: 0.407 kg. Radial runout of the assembled inner ring, Kia: 4 µm. Radial runout of the assembled outer ring, Kea: 5 µm.

Interchange guidance

NSK 7012CTRSULP4 is the current NSK-RHP catalogue designation for this bearing. SKF 7012 CDGA/P4A and FAG B7012-C-T-P4S-UL are the equivalent 15° universally matchable light-preload executions on the same envelope. Same-envelope bearings differing in contact angle, preload grade or tolerance class — 7012A5 at 25°, the medium and heavy preload grades, and P0 or P3 class pieces — are related sizes rather than interchanges.