SNR7004CDUJ74Angular Contact Ball Bearing – Straight Bore, 20 mm ID, 42 mm OD, 12 mm Width, Open, 15° Contact Angle, Light Preload.

Product Description

What this part is

SNR 7004CDUJ74 super-precision angular contact ball bearing, ISO 70 series, 20 x 42 x 12 mm. Brand: SNR. Manufacturer Part Number: 7004CDUJ74. Bearing Type: Angular contact ball bearing. Bore: 20 mm. Outside Diameter: 42 mm. Overall Width: 12 mm. Bore Type: Straight. Number Of Rows: 1. Rolling Elements: Ball. Closure Type: Open.

Decoding the designation

Contact Angle: 15°, carried by the C in 7004C. Preload: Light, carried by the J74 code. Precision Class: ISO P4, equivalent to ABEC 7. Cage Material: Phenolic. Series: 7000. Searchable forms of the designation: 7004CDUJ74, 7004-C-DU-J74, 7004 C DU J74, 7004C.

What these specs mean in practice

A 15° contact angle favours speed and radial rigidity over thrust capacity, which is what a machine-tool spindle position asks for. Light preload holds the ball complement in contact under a modest set force, giving repeatable running accuracy with low heat generation. ISO P4 holds tighter bore, outside diameter and running accuracy than standard class, so the shaft is located more closely and runs with less vibration. The phenolic cage is light and quiet at speed.

Quantity and configuration

Unit Quantity: 2 Pcs. Universally ground rings, matchable so the two bearings set together at the stated preload.

Interchange guidance

Cross-Reference 1: SKF 7004 CD/P4ADGA. Cross-Reference 2: FAG B7004-C-T-P4S-DUL. Cross-Reference 3: NSK 7004CTYNDULP4. Fafnir carton equivalent: 2MM9104WI CR DUL. A same-envelope bearing at a different contact angle is a related size rather than a substitution.