SKF7020ACDP4ASuper-Precision Angular Contact Ball Bearing – Straight Bore, 100 mm ID, 150 mm OD, 24 mm Width, Open, 25° Contact Angle, ABEC 7 / P4.

Product Description

What this part is

SKF 7020 ACD/P4A super-precision single row angular contact ball bearing. Bore: 100 mm. Outside diameter: 150 mm. Width: 24 mm. Series: 70, light section. Open on both faces, straight bore, chrome steel rings and balls.

Decoding the designation

AC: 25° contact angle. D: window-type cage centred on the outer ring, in fabric-reinforced phenolic resin. P4A: SKF super-precision tolerance class, ABEC 7 dimensional accuracy with running accuracy held tighter still.

What these specs mean in practice

Basic dynamic load rating: 79.3 kN (17,830 lbf). Basic static load rating: 80.0 kN (17,990 lbf). Fatigue load limit: 3.05 kN. On the 70 light section the static rating sits at or just above the dynamic rating, which is normal for this section. A 25° contact angle carries more thrust and less speed than a 15° angle of the same envelope. Attainable speed: 7,500 r/min on grease and 12,000 r/min on an oil-air feed. Ball complement: 22 balls at 15.875 mm diameter.

Quantity and configuration

One bearing. Mass: 1.25 kg (2.76 lbs).

Fitting notes

Shaft abutment diameter: 107 mm minimum. Housing abutment diameter: 143 mm maximum, and 146 mm on the opposing face. Maximum shaft fillet radius: 1.5 mm. Maximum housing fillet radius: 1 mm. Reference grease quantity: 16.2 cm³. Calculation factor a: 41.3 mm.

Interchange guidance

Crosses at 25°, super-precision: FAG B7020-E-T-P4S, NSK 7020A5, Fafnir 3MM9120WI. The 15° 7020 CD/P4A shares the 100 x 150 x 24 mm envelope as a related size at a different contact angle, with a dynamic rating of 78.0 kN and a static rating of 81.5 kN. Searchable forms: 7020ACDP4A, 7020-ACD/P4A, 7020 ACD P4A, 7020A5, 7020E, 7020A.