RHP7013CTSUHP4Super Precision Angular Contact Ball Bearing 65x100x18 mm 15° ABEC 7 Heavy Preload

Product Description

What this part is

RHP 7013CTSUHP4 single-row super-precision angular contact ball bearing. Bore: 65 mm. Outside Diameter: 100 mm. Overall Width: 18 mm. Contact Angle: 15°. Precision Class: P4 (ABEC 7 / ISO Class 4); RHP class code EP7. Cage Material: laminated phenolic resin. Cage Type: machined, outer-ring guided. Closure Type: open on both faces. Snap Ring Included: No. Bore Type: straight. Rolling Elements: carbon chrome bearing steel balls. Bearing Material: carbon chrome bearing steel, BS970 534A99/535A99 or SAE 52100. Series: RHP 70, ISO dimension series 10. Number Of Rows: 1. Design Units: metric. Harmonization Code: 8482.10.50.

Decoding the designation

Type 7: single-row angular contact ball bearing. Dimension series 0: ISO series 10. Bore code 13: 65 mm bore. Contact angle C: 15°. Cage T: laminated phenolic resin, outer ring guided. Grouping SU: single universal face control. Preload H: heavy. Precision grade P4: ISO Class 4, ABEC 7, British Standard EP7.

Load ratings and speed

Dynamic Load Rating (Cr): 37.0 kN (37,000 N). Static Load Rating (C0r): 34.5 kN (34,500 N). Limiting Speed: 21,600 rpm oil/air; 13,300 rpm grease. Lubricant: oil/air or grease. The tabulated speeds apply to a single bearing under a spring preload with the inner ring rotating.

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.

The heavy preload grade is the defining spec on this piece and it points the bearing at a different job from the more common light-preload stock. Axial Preload, heavy grade, as a paired set: 1,080 N. Axial Stiffness, heavy grade, as a paired set: 164 N per micrometre. The light grade on the same size gives 250 N and 82 N per micrometre, so the heavy grade doubles the axial stiffness. Preload removes internal play, fixes the contact angle and makes axial position and runout repeatable. It costs friction, and friction becomes heat, which is why the heavy grade also carries the lowest speed factor of the four. It suits heavily loaded, slower spindles where deflection under cutting load matters more than surface speed. 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. Maximum Operating Temperature: 120 °C, set by the phenolic.

P4 holds bore, outside diameter, width and running accuracy to single-digit micron limits, which is what makes the piece usable in a ground spindle stack. Radial runout of the assembled inner ring, Kia: 4 µm. Radial runout of the assembled outer ring, Kea: 5 µm.

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: 72 mm. Outer ring abutment diameters: D1 max 93 mm, D2 max 95 mm. Chamfer dimensions: r min 1.1 mm, r1 min 0.6 mm. Effective Load Centre (a): 20.0 mm. Internal free volume: 19.0 cm³. PCD of lubrication jets: 77.5 mm. Item Weight: 0.435 kg (0.959 lb).

Interchange guidance

NSK 7013CTRSUHP4 is the current NSK-RHP catalogue designation for this bearing, and the RHP carton alternate is B7013X2TAUHEP7. Same-envelope bearings differing in contact angle, preload grade or tolerance class — 7013A5 at 25°, the extra-light, light and medium preload grades, and other tolerance classes — are related sizes rather than interchanges. The preload grade is not a substitutable detail: an L-grade piece clamped into an H-grade stack produces a different stiffness and a different running temperature. A universally faced single also differs from a duplex-ground pair, since paired-unit pieces are ground as a set and are not interchangeable piece for piece with SU stock.