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. Country of Origin: United Kingdom.

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: tighter running accuracy, lower vibration and closer shaft location.

Specifications:

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. Maximum recommended operating temperature: 120 °C, set by the laminated phenolic cage.

A 25° contact angle gives higher thrust capacity and axial stiffness than a 15° build of the same envelope, at a lower speed ceiling. The laminated phenolic cage is light, so cage inertia and centrifugal loading stay low at speed. The 25° angle suits spindle positions where cutting generates real axial force, such as drilling, heavy milling and boring.

Dimensions and mounting:

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). 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 make a DUL light-preload duplex pair; three make a triplet.

Compatibility and replacement:

Searchable variants: 7205ETSULP4, 7205-E-T-SUL-P4, 7205 E T SUL P4, 7205ETSUL, 7205ETSULP4Q, 7205E, 7205. Carton cross-designations: 7205 X3 TA DUL EP7 and 3MM205WI CR DUL. Cross-references: NSK 7205A5TYNSULP4 (the RHP bearing line was absorbed by NSK), FAG B7205-E-T-P4S-UL and SKF 7205 ACDGA/P4A, all 25° super-precision at 25 x 52 x 15 mm. 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.

Frequently asked questions:

What contact angle does the 7205ETSULP4 have?

25°.

What does SU mean in 7205ETSULP4?

Single bearing, universally ground, so any two bearings of this designation stack to the specified preload in DB, DF or DT.

What is the NSK equivalent of the RHP 7205ETSULP4?

NSK 7205A5TYNSULP4.