SNR7208CG1DUJ74Angular Contact Ball Bearing – Straight Bore, 40 mm ID, 80 mm OD, 18 mm Width, Open, 15° Contact Angle, Light Preload.

Product Description

What this part is

SNR MACHLINE 7208CG1DUJ74 super-precision angular contact ball bearing, ISO 72 series, 40 x 80 x 18 mm. Brand: SNR. Manufacturer Part Number: 7208CG1DUJ74. Bearing Type: Angular contact ball bearing. Bore: 40 mm. Outside Diameter: 80 mm. Overall Width: 18 mm. Bore Type: Straight. Number Of Rows: 1. Rolling Elements: Ball. Closure Type: Open. MACHLINE is SNR’s machine-tool spindle bearing line.

Decoding the designation

Contact Angle: 15°, carried by the C in 7208C. Cage Material: Laminated phenolic, carried by the G1 code. Cage Type: Outer-ring centred. Preload: Light, carried by the J74 code. Precision Class: ISO P4, equivalent to ABEC 7. Series: 7200. Searchable forms of the designation: 7208CG1DUJ74, 7208-C-G1-DU-J74, 7208 C G1 DU J74, 7208C.

What these specs mean in practice

A 15° contact angle favours speed and radial rigidity over thrust capacity, which suits a machine-tool spindle position. Light preload keeps the ball complement in contact under a modest set force, giving repeatable running accuracy with low heat generation. Internal Clearance: N/A — the bearing is set by preload rather than by a running clearance. ISO P4 holds tighter bore, outside diameter and running accuracy than standard class, locating the shaft more closely and running with less vibration. The laminated phenolic cage is centred on the outer ring lands, which holds it stable at speed and keeps cage mass low. The 72 series carries a heavier section than the 70 series on the same bore.

Quantity and configuration

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

Interchange guidance

A same-envelope bearing at a different contact angle, or at a different preload class, is a related size rather than a substitution.