Koyo7205-5GL-P5Angular Contact Ball Bearing – 25 x 52 x 15 mm, 30° Contact Angle, ABEC 5, Light Preload, Polyamide Cage

Product Description

What this part is

Koyo 7205-5GL-P5, a single-row angular contact ball bearing from Koyo’s precision range. Bore: 25 mm. Outside Diameter: 52 mm. Overall Width: 15 mm. Contact Angle: 30°. Precision Class: P5 (ABEC 5). Preload: Light. Arrangement / Configuration: Universally matchable. Number Of Rows: 1. Rolling Elements: Ball. Cage Material: Polyamide resin. Closure Type: Open both faces. Bore Type: Straight. Internal Clearance: N/A — the bearing is preload-set, not clearance-set. Series: 7200. Country of Origin: Japan.

Decoding the designation

Contact Angle: 30°. On Koyo and JTEKT’s own scheme a 7000-series designation carrying no angle letter is 30°; a C is 15° and a B is 40°. This is a different convention from the RHP and Timken scheme, where a missing angle letter means 40°. Precision Class: P5, which is ABEC 5. Cage Material: Polyamide resin, from the Koyo FG cage code on the carton. Preload and matching: UL on the carton — universally matchable, light preload. Base Number: 7205.

What these specs mean in practice

A 30° contact angle sits between the 15° and 40° executions on the same envelope: it carries appreciably more axial load than a 15° while keeping a higher speed capability than a 40°. That makes it the usual choice where a shaft sees a steady one-way thrust alongside its radial load rather than a purely radial or a purely axial duty. ABEC 5 tightens bore, outside-diameter and running-accuracy tolerances well beyond a standard P0 bearing, so the shaft locates more precisely and runs with less induced vibration. Light preload takes out all internal play at the lowest of the preload steps, which keeps running temperature and friction torque down. The polyamide resin cage is light and low-friction, and it damps rather than transmits the small shocks a machined metal cage would pass through to the balls.

Quantity and configuration

Unit Quantity: 1 Pc. Universally matchable: both faces are ground to a common reference, so any two or more pieces of this designation stack directly into a matched duplex, triplex or quad set back-to-back, face-to-face or in tandem at light preload, with no shims and no regrinding.

Interchange guidance

Same-envelope 25 x 52 x 15 mm angular contact designations at other contact angles are related sizes rather than interchanges: 7205C is the same envelope at 15° and 7205B is the same envelope at 40°, and neither carries the same axial-load and speed behaviour as this 30° execution. Searchable variants of this designation: 7205-5GL-P5, 72055GLP5, 7205 5GL P5, 7205 5 GL UL FG P5, 7205-UL-P5, and the base 7205.