RHP7205ETSULP4Super Precision Angular Contact Ball Bearing, SINGLE Universally Ground, 25 x 52 x 15 mm, 25°, Phenolic Cage, P4 Light Preload

Product Description

What this part is

RHP 7205ETSULP4 super-precision single-row angular contact ball bearing, ISO dimension series 02, built for machine-tool spindles. Bore: 25 mm. Outside Diameter: 52 mm. Overall Width: 15 mm. Contact Angle: 25°. Precision Class: P4 / ABEC 7. Cage Material: laminated phenolic resin. Cage Type: machined, outer-ring guided. Bore Type: Straight. Number Of Rows: 1. Rolling Elements: Ball. Closure Type: Open. Unit Quantity: 1 Pc.

Published ratings

Dynamic Load Rating: 15.9 kN (15 900 N) per bearing. Static Load Rating: 9.8 kN (9 800 N) per bearing. Limiting Speed: 39 800 rpm on oil/oil-air lubrication and 24 600 rpm on grease. Preload: light (L), 150 N axial as a paired set. Axial Stiffness: 90 N/µm for a light-preload pair. Effective load centre a: 16.5 mm. Lubricant: grease or oil. The laminated phenolic cage carries a maximum recommended operating temperature of 120 °C.

Mounting data

Inner Ring Abutment Diameter d1 min: 31 mm. Outer Ring Abutment Diameter D1 max: 46 mm. Housing Abutment Diameter D2 max: 47 mm. Fillet Radius r min: 1.0 mm. Fillet Radius r1 min: 0.6 mm. Lubrication Jet Pitch Circle Diameter dT: 35.5 mm. Internal volume: 6.2 cm³. Mass: 0.128 kg (0.28 lb).

Decoding the designation

7205: single-row angular contact ball bearing, ISO series 02, bore code 05 for a 25 mm bore. E: 25° contact angle in the RHP scheme. T: machined phenolic cage. SU: single, universally ground. L: light preload. P4: ABEC 7 precision, which buys tighter running accuracy, lower vibration and closer shaft location.

What these specs mean in practice

A 25° contact angle steers more of the load path into the axial direction, so it carries higher thrust and gives higher axial stiffness than a 15° build of the same envelope. The speed ceiling comes down in exchange. That makes 25° the spindle choice where the cut generates real axial force and deflection must stay small — drilling, heavy milling and boring. The laminated phenolic cage is light, so cage inertia and centrifugal loading stay low at speed; it damps vibration, runs quietly, and releases a trace of lubricant into the ball pockets.

Quantity and configuration

Unit Quantity: 1 Pc. Arrangement / Configuration: SU, universally ground. The ring faces are ground to a controlled offset, so any two bearings of this designation stack to the specified light preload back-to-back (DB), face-to-face (DF) or in tandem (DT). Two of these make a DUL light-preload duplex pair; three make a triplet.

Interchange guidance

Search forms include 7205ETSULP4, 7205-E-T-SUL-P4, 7205 E T SUL P4, 7205ETSUL, 7205ETSULP4Q, 7205E and 7205. Carton cross-designations: 7205 X3 TA DUL EP7 and 3MM205WI CR DUL. The RHP bearing line was absorbed by NSK, and the NSK equivalent is 7205A5TYNSULP4. Same-envelope 25° super-precision equivalents at 25 x 52 x 15 mm include FAG B7205-E-T-P4S-UL and SKF 7205 ACDGA/P4A. Related builds on the same envelope: 7205ETDULP4 (factory-matched light-preload duplex pair), 7205ETSUMP4 (medium preload), 7205ETSUHP4 (heavy preload). 7205CTSULP4 is the 15° build on the same envelope — a related size, with a higher speed ceiling and lower thrust capacity.