SKF7012ACDP4AQGBSuper Precision Angular Contact Ball Bearing Set – Straight Bore, 60 mm ID, 95 mm OD, 18 mm Width, Open, 25° Contact Angle, Universal, Medium Preload, 4 Pcs

Product Description

What this part is

SKF 7012 ACD/P4A QGB super-precision angular contact ball bearing set. Series: 70. Base number: 7012. Bore: 60 mm. Outside diameter: 95 mm. Width: 18 mm per bearing. Single row per bearing, straight bore, open on both faces. Searchable variants of the designation: 7012ACD/P4AQGB, 7012 ACD P4A QGB, 7012ACDP4AQGB, 7012-ACD-P4A-QGB.

Decoding the designation

Contact Angle: 25°. Design: ACD high-capacity super-precision execution. Precision Class: P4A, equivalent to ABEC 7. Set code QGB: Q = four bearings, G = universally matchable, B = medium preload. Cage: machined, fabric-reinforced phenolic, rated to 120 °C.

What these specs mean in practice

A 25° contact angle carries more thrust and less speed than a 15°. Medium preload raises stiffness and axial location accuracy over the light class at the cost of some heat generation. Universally matchable rings can be stacked in any combination of back-to-back, face-to-face or tandem without shims. Basic dynamic load rating: 39 kN (8767 lbf) per bearing. Basic static load rating: 33.5 kN (7531 lbf) per bearing. Limiting speed: 20000 rpm.

Quantity and configuration

Four bearings, supplied as a universally matchable medium-preload set. Unit Quantity: 4 Pcs. Total set width across four bearings: 72 mm. Internal Clearance: N/A — the set is preload-set, not clearance-set.

Fitting notes

Ring faces are ground so that clamping adjacent rings solid produces the specified medium preload. Mounting is by interference on the inner ring seats with the outer rings located axially in the housing. Operating range: -30 °C to 120 °C, oil or grease.

Interchange guidance

Same-envelope equivalents: FAG B7012-E-T-P4S, Fafnir 2MM9112WI. Related sizes: 7012 CD/P4A carries a 15° contact angle, and 7012 ACD/P4A DGA carries light preload as a universally matchable single.