RHP7010CTDULP4Super Precision Angular Contact Ball Bearing – Straight Bore, 50 mm ID, 80 mm OD, 16 mm Width, Open, 15° Contact Angle, Light Preload, Matched Duplex Pair

Product Description

What this part is

RHP 7010CTDULP4 super-precision single-row angular contact ball bearing, supplied as a universally ground matched duplex pair. Bore: 50 mm. Outside Diameter: 80 mm. Overall Width: 16 mm per bearing. Contact Angle: 15°. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Rolling Elements: chrome steel balls. Bearing Material: carbon chrome bearing steel to BS970 534A99 / 535A99, equivalent to SAE 52100, through hardened and heat treated for stability.

Decoding the designation

Series: 7000, ISO dimension series 10. Bore code 10 gives a 50 mm bore. Contact Angle: 15°. Cage Material: laminated phenolic resin. Cage Type: outer-ring guided. Arrangement: DU, a paired unit. Preload: Light. Precision Class: P4. The carton carries the same bearing in three schemes and all three agree on the angle: RHP 7010-C-T-DUL-P4, RHP B-series B7010X2TADULEP7, and Fafnir 2MM9110WI. Searchable variants: 7010C, 7010 C T DUL P4, 7010CTRDULP4, B7010X2TADULEP7, 2MM9110.

Load ratings and speeds

Dynamic Load Rating: 26.0 kN. Static Load Rating: 21.9 kN. Limiting Speed: 28,000 rpm with oil-air lubrication and 17,300 rpm with grease. The two figures differ because oil-air carries heat out of the bearing and continuously replenishes the film, while grease lubricates without cooling. Mounted as a light-preload back-to-back pair the limiting speed carries a factor of 0.80; face-to-face mounting halves it again. Lubricant: oil or grease.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity, which is what a machine tool spindle wants. Axial Preload: 150 N as a light-preload pair. Axial Stiffness: 63 N per micron. Effective Load Centre: 16.7 mm. Maximum Operating Temperature: 120°C, set by the laminated phenolic resin cage. A phenolic cage is light, quiet and self-lubricating, and it rides on the outer ring land so the cage is guided by the slower-moving ring. Min Temp: -30°C.

Precision and running accuracy

Precision Class: P4. Precision Rating: ABEC 7, ISO 492 Class 4, BS292 EP7. Deviation of mean bore diameter: 0 to minus 5 microns. Deviation of mean outside diameter: 0 to minus 5 microns. Radial runout of the assembled inner ring: 4 microns maximum. Radial runout of the assembled outer ring: 5 microns maximum. The high point of radial runout is marked by a burnished spot on the inner ring face and by a V line on the outer ring outside diameter, and the V also gives the direction of the contact angle.

Mounting data

Shaft abutment diameter d1: 56 mm minimum. Housing abutment diameter D1: 74 mm maximum. Outer ring abutment diameter D2: 75 mm maximum. Bearing fillet radius r: 1.0 mm minimum. Inner fillet radius r1: 0.6 mm minimum. Internal Volume: 12.0 cubic centimetres, which is the figure grease quantity is calculated from. Lubrication jet pitch circle diameter: 60.6 mm. Item Weight: 0.58 lbs, 0.259 kg per bearing.

Quantity and configuration

Unit Quantity: 2 Pcs. Two universally ground bearings supplied as a matched pair. Mounting Arrangement: Universal. Universal face control means the inner and outer rings are the same width and the face relationship is ground at manufacture to give the light preload, so the pair mounts back-to-back or face-to-face at the same preload value and shares load equally in tandem. No ground spacers are needed to set the preload.

Interchange guidance

Cross-references on the same envelope, angle and execution: SKF 7010 CD/P4ADGA, FAG B7010-C-T-P4S-DUL, NSK 7010CTRDULP4, Fafnir 2MM9110WI CR DUL. The 25° 7010A5 shares the same 50 x 80 x 16 mm envelope and is a related size rather than a substitution, because the angle sets both the thrust capacity and the speed limit. Harmonization Code: 8482.10.50.68.