RHP7303ETSULP4Super Precision Angular Contact Ball Bearing – 17 mm Bore, 47 mm OD, 14 mm Width, 25° Contact Angle, ABEC 7 / P4, Phenolic Cage

Product Description

What this part is

RHP 7303-E-T-SUL-P4 single-row super precision angular contact ball bearing. Bore Diameter: 17 mm. Outside Diameter: 47 mm. Overall Width: 14 mm. Contact Angle: 25°. Precision Class: ABEC 7 / P4. Number Of Rows: 1. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Cage Material: Phenolic.

Decoding the designation

73 — ISO dimension series 03, the heavy section. At a given bore it has the largest outside diameter and the greatest section height of the angular contact series, which is what buys it its load capacity. At 17 mm bore it runs a 47 mm outside diameter where the 72 series runs 40 mm and the 70 series 35 mm.

03 — bore code. Bore Diameter: 17 mm.

E — 25° contact angle, the legacy RHP code for the execution now designated A5.

T — machined laminated phenolic cage.

SU — universal face control. Faces are ground so that any two bearings from the range stack back-to-back, face-to-face or in tandem and reach their preload on clamping, with no shims or ground spacers.

L — light preload class for a universal pair.

P4 — RHP tolerance class P4, equivalent to BS 292 EP7 and ABEC 7. This is the super precision class: tighter bore, outside diameter and raceway tolerances, and lower radial and axial runout, than a standard P0 bearing of the same size.

What these specs mean in practice

The 25° contact angle sits between the 15° high-speed executions and the 40° heavy-thrust ones. It takes substantially more axial load than a 15° bearing of the same envelope while keeping more speed capability than a 40° one.

The heavy 73 section on a small bore gives an unusually stiff bearing for its shaft size, which is why this combination turns up on compact high-load spindles and small gearbox output shafts.

Cage Material: Phenolic. A laminated phenolic cage is light, tolerant of marginal lubrication and quiet at speed. Bearing Material: Bearing steel. Lubricant: grease or oil.

Quantity and configuration

Unit Quantity: 1 Pc. Preload: Light. Mounting Arrangement: Universally ground for pairing.

Interchange guidance

The 25° angle in the 73 heavy series is an RHP execution. Other makers cover the 17 x 47 x 14 mm envelope at different angles, so the following share the envelope and the mounting but not the contact angle: NSK 7303A at 30°, SKF 7303 BECBP at 40° and FAG 7303-B-TVP at 40°. Matching the angle matters wherever the bearing is paired or preloaded.