RHPSuper Precision Angular Contact Ball Bearing – Matched Pair, Straight Bore, 80 mm ID, 125 mm OD, 22 mm Width, Open, 25° Contact Angle, Universal Medium Preload

Product Description

What this part is

RHP 7016ETDUMP4 is a matched pair of super-precision angular contact ball bearings. Bore: 80 mm. Outside Diameter: 125 mm. Overall Width: 22 mm per bearing. Total Width: 44 mm for the pair. Series: 7000, ISO 70. Base Number: 7016. Bore Type: Straight. Closure Type: Open. Bearing Material: Chrome bearing steel. Rolling Elements: Ball. Cage Material: Machined laminated phenolic.

Decoding the designation

Series: ISO 70, bore code 16, giving an 80 mm bore. Contact Angle: 25°. Cage Material: Phenolic, machined laminated fabric. Cage Type: Outer-ring guided, machined. Arrangement / Configuration: Universally matchable duplex set (DU). Preload: Medium (M). Precision Class: P4, equal to ABEC 7. The carton also carries the Fafnir designation 3MM9116WI CR DUM, where 3MM is likewise 25°.

What these specs mean in practice

A 25° contact angle carries more thrust and less speed than a 15° bearing of the same envelope, which suits spindles and screw drives where axial load dominates. Medium preload raises stiffness and running accuracy over a light-preload set and generates more heat in return. The machined phenolic cage is light, tolerant of marginal lubrication and rated for continuous service to 120 °C. Max Temp: 120 °C. Min Temp: -30 °C. Lubricant: Oil or grease.

Load ratings and speed

Dynamic Load Rating: 70.0 kN per bearing. Static Load Rating: 52.5 kN per bearing. Permissible Axial Load: 41.0 kN. Limiting Speed: 9,800 rpm on grease and 14,700 rpm on oil or oil-air. Effective Load Centre: 34.9 mm. Chamfer Dimensions: r 1.1 mm minimum, r1 0.6 mm minimum. Item Weight: 0.880 kg (1.94 lb) per bearing.

Quantity and configuration

Unit Quantity: 2 Pcs, one universally matchable pair. Universally matchable rings stack back-to-back, face-to-face or in tandem, with preload established by the ground offset rather than by shims. Internal Clearance: N/A — the set is preloaded. Marking lines on the outer ring faces identify the intended stacking orientation.

Cross-reference guidance

NSK 7016A5TRDUMP4 and SKF 7016 ACD/P4ADGC share the envelope, the 25° angle and the medium preload. Fafnir 3MM9116WI CR DUM is the Timken designation. FAG B7016-E-T-P4S-DUL shares the envelope and angle at light preload, so it is a near match, not the same.