RHP7020ETDULP4Super Precision Angular Contact Ball Bearing – Straight Bore, 100 mm ID, 150 mm OD, 24 mm Width, Open, 25° Contact Angle, Universally Matchable Light Preload

Product Description

What this part is

RHP 7020ETDULP4 is a single super-precision angular contact ball bearing, 100 mm bore, 150 mm outside diameter and 24 mm width. Rings and balls are chrome bearing steel, the cage is machined laminated phenolic and both faces are open. The bearing is ground as one half of a universally matchable light-preload pair.

Decoding the designation

7020 is the ISO 70 dimension series with a 100 mm bore. In the RHP scheme E denotes a 25° contact angle, T a machined laminated phenolic cage guided on the outer ring, DUL a universally matchable duplex ground to light preload, and P4 ABEC 7 precision. The carton also carries the RHP B-series number B7020TADULEP7, whose EP7 class code confirms P4, and the Fafnir designation 3MM9120WI CR DUL, whose 3MM prefix independently confirms the 25° angle. The -1/2PR suffix on the carton denotes one bearing out of a pair.

What these specs mean in practice

A 25° contact angle carries more thrust and less speed than a 15° bearing on the same envelope, which suits spindles where axial load dominates. Light preload favours speed and low heat generation over maximum stiffness. The machined phenolic cage is light, quiet and tolerant of marginal lubrication, and is rated for continuous service to 120 °C.

Load ratings and speed

Basic dynamic load rating 89.5 kN, basic static load rating 73.5 kN. Limiting speed 8,000 rpm on grease and 12,000 rpm on oil. Approximate mass 1.45 kg.

Quantity and configuration

One bearing. Universally matchable grinding allows two or more of these rings to be stacked back-to-back, face-to-face or in tandem, and the light preload is established by the ground offset rather than by shims. A preloaded bearing carries no radial internal clearance, so clearance class does not apply.

Fitting notes

Rings are pressed on their own faces, never through the ball complement. Shaft and housing seats ground to the super-precision fit tables give the preload its intended value. Face marking lines are aligned when stacking so the intended arrangement is held.

Interchange guidance

SKF 7020 ACDGA/P4A and NSK 7020A5TRDULP4 share the envelope, the 25° angle and the light preload, and are direct equivalents. Fafnir 3MM9120WI CR DUL is the Timken equivalent. NSK 7020CTRDULP4 shares the envelope and preload at a 15° angle, making it a related size rather than an interchange.