SNR7218CDUJ74Angular Contact Ball Bearing – 90 mm ID, 160 mm OD, 30 mm Width, Open, 15° Contact Angle, Light Preload.

Product Description

What this part is

SNR 7218CDUJ74 single-row angular contact ball bearing, supplied as a matched duplex pair. Brand: SNR. Manufacturer Part Number: 7218CDUJ74. Bore: 90 mm. Outside Diameter: 160 mm. Width: 30 mm per bearing. Series: 7200. Number of Rows: 1 per bearing. Rolling Elements: Ball. Bearing Material: bearing steel. Closure Type: open on both faces. Bore Type: straight. Item Weight: 4.10 lbs.

Decoding the designation

Contact Angle: 15°. Preload: light. Precision Class: ABEC 7, equivalent to P4. Cage Material: phenolic. Cage Type: outer-ring land-riding. Mounting Arrangement: universally ground. Lubricant: oil. Minimum Temperature: -30°C. Maximum Temperature: 120°C.

The carton carries this bearing in four schemes: SNR 7218 C DU J74, FAG 7218-C-T-SUL-P4, Fafnir 2MM218WI CR SUL and NSK 7218CTYNSULP4. Searchable variants of the number include 7218CDUJ74, 7218 C DU J74 and 7218-C-DU-J74.

What these specs mean in practice

A 15° contact angle keeps the load path close to the radial plane, favouring radial stiffness over thrust capacity. The 72-series section is the heavier of the two common angular contact profiles at a given bore, so this bearing carries more load than a 70-series bearing on the same 90 mm shaft.

The phenolic cage is light and absorbs oil, so it runs cooler and quieter than brass or steel at speed, and the 120°C ceiling reflects the phenolic. Riding on the outer-ring land centres the cage on the stationary ring, steadying cage motion through acceleration and deceleration. ABEC 7 precision holds low radial and axial runout and gives close, repeatable shaft location. Light preload removes internal play and fixes the ball path, which is why this bearing is set by preload rather than by an internal clearance class.

Quantity and configuration

Unit Quantity: 2 Pcs. This listing supplies a matched duplex pair, universally ground so the two bearings can be clamped together in any face orientation and will arrive at the designed light preload.

Interchange guidance

Cross-Reference: SKF 7218 CD/P4ADGA. Cross-Reference: NSK 7218CTYNSULP4. Cross-Reference: FAG 7218-C-T-SUL-P4. Cross-Reference: Fafnir 2MM218WI CR SUL. Harmonization Code: 8482.10.50.28. A same-envelope 7218 built at 25° is a related size rather than a substitution, because the steeper angle changes both the thrust capacity and the speed behaviour. A 7018 shares the 90 mm bore but is the lighter 70-series section, so it is a related size and not an equivalent.