RHP7205CTDULP4Super Precision Angular Contact Ball Bearing – 25 mm Bore, 52 mm OD, 15 mm Width, 15° Contact Angle, P4 / ABEC 7, Light Preload, Universally Matchable Single

Product Description

What this part is

RHP 7205CTSULP4 super precision angular contact ball bearing in the ISO 02 dimension series. Bore 25 mm, outside diameter 52 mm, width 15 mm. Rings and balls are carbon chrome bearing steel to SAE 52100, through hardened and heat treated for dimensional stability.

Decoding the designation

Reading the RHP scheme: 7 is a single row angular contact ball bearing, 0 the ISO 02 dimension series, 05 a 25 mm bore code, C a 15° contact angle, T an outer-ring-guided laminated phenolic cage, SU a universally matchable single, L light preload and P4 the precision grade. P4 corresponds to ISO Class 4, ABEC 7 and British Standard BS292 grade EP7. The carton carries the same bearing in two further schemes: 7205X2TAULEP7 in the RHP B-series scheme and 2MM205WICRSUL in the Fafnir scheme, where X2 and 2MM both denote the same 15° contact angle.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness; a 25° bearing in the same envelope carries more thrust and runs slower. Basic dynamic radial load rating is 16.6 kN and basic static radial load rating is 10.2 kN. Limiting speed is 44 900 rev/min on oil/air lubrication and 27 800 rev/min on grease, quoted for a single bearing under spring preload. A light-preloaded pair develops 78 N of axial preload at an axial stiffness of 36 N/µm. The laminated phenolic cage is rated to a maximum operating temperature of 120 °C.

Quantity and configuration

One bearing. SU denotes a universally matchable single: inner and outer rings are the same width and the ring faces are ground at manufacture so that any two bearings of this designation clamp up to the light preload value back-to-back or face-to-face without custom spacers, or run in tandem sharing load equally.

Fitting notes

The high point of radial runout is marked by a burnished spot on the inner ring face and by a V line on the outer ring diameter; the V also indicates the direction of the contact angle. Shaft abutment diameter is 31 mm and the housing abutment diameter runs 46 mm minimum to 47 mm maximum. Effective load centre is 12.7 mm from the bearing face. Internal free volume is 6.2 cm³ and the pitch circle diameter for lubrication jets is 35.5 mm. A light interference fit on the shaft with a transition fit in the housing suits a locating position with a rotating inner ring.

Interchange guidance

7205X2TAULEP7 and Fafnir 2MM205WICRSUL are the carton-printed equivalents of this exact execution. The 7205A5 executions share the 25 x 52 x 15 mm envelope at a 25° contact angle and are a related size rather than an interchange, as are the DU, DB, DF and DT paired executions and the EL, M and H preload grades.