SKF7004CDGAP4ASuper-Precision Angular Contact Ball Bearing – 20 mm ID, 42 mm OD, 12 mm Width, Open, 15° Contact Angle, Light Preload

Product Description

What this part is

SKF 7004 CDGA/P4A single-row super-precision angular contact ball bearing. Series: 70. Bore: 20 mm. Outside diameter: 42 mm. Width: 12 mm. Contact Angle: 15°. Open on both faces. Country of origin: Italy. GTIN: 7316570434330. Searchable forms include 7004CDP4ADGA, 7004 CD P4A DGA and 7004C.

Decoding the designation

CD: high-capacity D design at a 15° contact angle. GA: light preload on a universally matchable bearing. Precision Class: P4A, SKF’s super-precision class, equivalent to ABEC 7 and ABMA Class 9 running accuracy. The carton also carries the Fafnir equivalent 2MM9104WI CR DUL and the NSK form 7004 C T DUL P4, in which 2MM and C both confirm the 15° angle and CR the phenolic outer-ring land-riding cage.

What these specs mean in practice

Dynamic Load Rating: 10.4 kN. Static Load Rating: 6.55 kN. Limiting Speed: 36,000 rpm. A 15° contact angle keeps friction and heat low at high shaft speed and carries thrust in one direction, which suits a driven or high-speed spindle position, and P4A running accuracy holds the shaft to a tighter runout than a standard-class bearing of the same size.

Quantity and configuration

One bearing, one half of a factory duplex light-preload pair — the right choice for a buyer who needs a single. As a universally matchable execution it also combines back-to-back, face-to-face or in tandem with further bearings of the same designation without shims or grinding.

Fitting notes

Straight bore on a cylindrical shaft seat. Preloaded execution, so Internal Clearance reads N/A. Cage: machined phenolic, riding on the outer ring land. Operating range: -30 °C to 120 °C.

Interchange guidance

Base number: 7004. FAG equivalent: B7004-C-T-P4S. Fafnir equivalent: 2MM9104WI CR. NSK equivalent: 7004CTP4. SKF 7004 ACDGA/P4A carries a 25° contact angle on the same 20 x 42 x 12 mm envelope and is a related size rather than a direct substitution.