SNR7020CDUJ74Super Precision Angular Contact Ball Bearing – Straight Bore, 100 mm ID, 150 mm OD, 24 mm Width, Open, 15° Contact Angle, Light Preload, Universal Pairing.

Product Description

What this part is

SNR 7020CDUJ74 single-row super-precision angular contact ball bearing, supplied as a matched duplex pair. Brand: SNR. Manufacturer Part Number: 7020CDUJ74. Bore: 100 mm. Outside Diameter: 150 mm. Width: 24 mm per bearing. Series: 7000. Number of Rows: 1 per bearing. Rolling Elements: Ball. Bearing Material: bearing steel. Closure Type: open on both faces. Bore Type: straight. Item Weight: 2.56 lbs.

Decoding the designation

Contact Angle: 15°. Preload: light. Precision Class: ABEC 7, equivalent to P4. Cage Material: phenolic. Cage Type: machined, outer-ring land-riding. Mounting Arrangement: universally ground. Minimum Temperature: -30°C. Maximum Temperature: 100°C.

The carton carries this bearing in five schemes: SNR 7020 C V DU J74, FAG 7020-C-T-DUL-P4, Fafnir 2MM9120WI CR DUL, SKF 7020 CD/P4ADGA and RHP 7020CTDULP4. Searchable variants of the number include 7020CDUJ74, 7020CVDUJ74, 7020 C V DU J74 and 7020-C-DU-J74.

What these specs mean in practice

A 15° contact angle keeps the load path close to the radial plane, favouring speed and radial stiffness over thrust capacity. That is the trade a large high-speed spindle position normally wants.

Dynamic Load Rating: 74.0 kN. Static Load Rating: 80.0 kN. At this size the static figure sits above the dynamic one, which is normal for the 70-series from this bore code upward: the static rating is governed by permanent raceway deformation under a standing load, and it climbs faster with size than the fatigue-governed dynamic rating does.

The machined phenolic cage is light and absorbs oil, so it runs cooler and quieter than brass or steel at high shaft speed. 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 7020 CD/P4ADGA. Cross-Reference: FAG B7020-C-T-P4S-DUL. Cross-Reference: Fafnir 2MM9120WI-DUL. Cross-Reference: RHP 7020CTDULP4. Harmonization Code: 8482.10.50. A same-envelope 7020 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 medium or heavy preload execution of the same number is likewise a related build, not an equivalent.