SNR71904HDUJ74Angular Contact Ball Bearing – 20 mm ID, 37 mm OD, 9 mm Width, Open, 25° Contact Angle, Light Preload.

Product Description

What this part is: SNR 71904HDUJ74 super-precision angular contact ball bearing. Series: 719. Base Number: 71904. Bore: 20 mm. Outside Diameter: 37 mm. Overall Width: 9 mm. Number Of Rows: 1. Rolling Elements: Balls. Bearing Material: Bearing Steel. Closure Type: Open. Bore Type: Straight. Design Units: Metric. Decoding the designation: Contact Angle: 25°, given by the SNR H code. Preload: Light, given by J74. Precision Class: ISO Class 4, equivalent to ABEC 7 and P4. Running Accuracy — Radial And Axial Runout: P4. Searchable forms of the number: 71904HDUJ74, 71904 H DU J74, 71904-H-DU-J74, 71904HDUJ74-1/2PR. What these specs mean in practice: Dynamic Load Rating: 7.2 kN. Static Load Rating: 4.6 kN. A 25° contact angle carries more thrust and less speed than a 15° execution on the same envelope, which suits axially loaded spindle and instrument positions. Cage Material: Phenolic — light, quiet and self-lubricating, rated for continuous running. Max Temp: 120°C. Min Temp: -30°C. Quantity and configuration: Unit Quantity: 1 Pc. The -1/2PR suffix denotes one bearing. Preloaded execution, so the bearing is supplied set rather than clearance-graded. Interchange guidance: Cross-Reference 1: SKF 71904 ACD/P4ADGA, the same 20 x 37 x 9 mm envelope at a matching precision class. MPN Variants recorded on this part: 7904A5/ACD, 7904E T DUL P4, 3MM9304WI CR DUL, 71904 H V DU J74, 7904-E-T-DUL-P4. Common Misspellings: 71904 HDU J74, 71904HDU-J74.