SKF71928CDP4ADGASuper-Precision Angular Contact Ball Bearing – 140 mm ID, 190 mm OD, 24 mm Width, Open, 15° Contact Angle, Extra Light Preload

Product Description

What this part is

SKF 71928 CD/P4A DGA single-row super-precision angular contact ball bearing, also written 71928 CDGA/P4A. Series: 719, extra-light section. Bore: 140 mm. Outside diameter: 190 mm. Width: 24 mm. Contact Angle: 15°. Open on both faces. Country of origin: Italy. Short forms in trade use: 71928CDP4ADGA and 7928.

Decoding the designation

CD: high-capacity D design at a 15° contact angle. DGA: universally matchable, extra light preload. Precision Class: P4A, SKF’s super-precision class, equivalent to ABEC 7.

What these specs mean in practice

Dynamic Load Rating: 88.4 kN. Static Load Rating: 110 kN. The 719 extra-light section keeps a 190 mm outside diameter on a 140 mm bore, so a large-diameter spindle stays compact and light in rotating mass, and the 15° contact angle keeps the speed capability high while taking thrust in one direction. Limiting Speed: 8,500 rpm.

Quantity and configuration

Universally matchable execution. Bearings of this designation combine back-to-back, face-to-face or in tandem without shims or grinding, and the preload of the finished arrangement follows from the DGA class.

Fitting notes

Straight bore on a cylindrical shaft seat. Preloaded execution, so Internal Clearance reads N/A. Cage: machined, phenolic. Operating range: -40 °C to 120 °C.

Interchange guidance

Base number: 71928. NSK equivalent on the same envelope: 7928CTDULP4. SKF 71928 CDGB/P4A and 71928 CDGC/P4A carry light and medium preload, and 71928 ACDGA/P4A carries a 25° contact angle — each a related size on the same 140 x 190 x 24 mm envelope rather than a direct substitution.