RHP7205CTDUMP2Super Precision Angular Contact Ball Bearing – 25 mm ID, 52 mm OD, 15 mm Width, Open, 15°, Medium Preload Matched Pair

Product Description

What this part is

A matched pair of RHP 7205 C T DUM P2 super-precision angular contact ball bearings, 25 mm bore, 52 mm outside diameter, 15 mm width each. Single row, open, chrome steel rings and balls, universally ground for duplex mounting.

Decoding the designation

In the RHP scheme the C and the equivalent X2 both denote a 15° contact angle. T is a phenolic cage, outer-ring-land-riding. DUM is a universally ground duplex set at medium preload. P2 corresponds to the RHP/NSK code EP9, ABEC 9. The Fafnir equivalent 2MMV205WI-CR-DUM appears on the same carton.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity, which is why this variant is standard in machine tool spindles and high-speed grinding heads. The phenolic cage is light and self-lubricating, supporting the 28,000 rpm oil-lubricated limiting speed. Medium preload raises axial and radial stiffness above a light-preload set, at the cost of running temperature.

Quantity and configuration

Two pieces, supplied as a universally ground pair. Universally ground rings allow the pair to be assembled back-to-back, face-to-face or in tandem, with the medium preload realised in the back-to-back and face-to-face arrangements.

Fitting notes

Oil lubrication suits the published speed rating; grease lubrication reduces it. Operating range for the phenolic cage is –30 °C to 100 °C.

Interchange guidance

Direct equivalents at the same angle, class and preload include FAG B7205-C-T-P4S-DUM, SKF 7205 CD/P4ADGB, NSK 7205CTYDUMP4 and Fafnir 2MMV205WI-CR-DUM. A 7205 A5 or 7205 AC is the same 25 x 52 x 15 mm envelope at a 25° angle, a related size rather than an interchange.