RHP7214CTDULP4Super Precision Angular Contact Ball Bearing – Straight Bore, 70 mm ID, 125 mm OD, 24 mm Width, Open, 15 Degree Contact Angle, Universal Matchable Duplex Pair, Light Preload, Laminated Phenolic Cage

Product Description

What this part is

An RHP 7214CTDULP4 super precision angular contact ball bearing set, supplied as a universally matchable duplex pair. Bore 70 mm, outside diameter 125 mm, width 24 mm per bearing, giving 48 mm of total width across the mounted pair. Single row of balls per bearing, open on both faces, with a machined laminated phenolic cage guided on the outer ring.

Decoding the designation

In the RHP scheme the C in 7214C sets the contact angle at 15°. The T denotes the machined laminated phenolic cage. DUL marks a universally matchable duplex pair set to light preload, and P4 is the precision class, equivalent to ABEC 7. The same envelope carries a Fafnir designation of 2MM214WI, where the 2MM prefix independently confirms the 15° angle, and a Barden designation of 214HDL.

What these specs mean in practice

A 15° contact angle is the high-speed, lower-thrust end of the angular contact range. It carries less axial load than a 25° or 40° bearing of the same size but tolerates higher shaft speeds and generates less heat, which is why 15° is the usual choice for machine tool spindles and grinding heads. The laminated phenolic cage supports that duty: it is light, quiet, tolerant of oil mist and jet lubrication, and outer-ring guided so it stays stable at speed. ABEC 7 sets tight running accuracy on radial and axial runout.

Quantity and configuration

Two bearings, supplied as a matched universal set. Universal matchability means the pair can be mounted back-to-back, face-to-face or in tandem and will arrive at the specified light preload without shims or spacers. Light preload favours speed and low heat generation over maximum stiffness. Because the set is preloaded, it carries no radial internal clearance value.

Fitting notes

The bearings are mounted straight onto a cylindrical shaft seat; there is no tapered bore and no adapter sleeve. Preload is established by the ground faces of the matched pair, so the two rings are clamped solidly against the shaft shoulder and the housing abutment. Phenolic cages are hygroscopic and are best stored in their sealed carton until fitting.

Interchange guidance

Closest matches at 15°, ABEC 7 and light preload in a duplex set: SKF 7214 CD/P4ADGB, Barden 214HDL and Fafnir 2MM214WI-CR-DUL. FAG B7214-C-T-P4S-UL is the same bearing supplied as universal singles rather than a matched pair.