SKF7015CDP4ADGASuper-Precision Angular Contact Ball Bearing – 75 mm ID, 115 mm OD, 20 mm Width, Open, 15°, Light Preload

Product Description

What this part is

An SKF 7015 CD/P4ADGA single-row angular contact ball bearing. Bore 75 mm, outside diameter 115 mm, width 20 mm. Open on both faces, super-precision tolerance class, universally matchable and supplied with light preload. Chrome steel rings and balls with a fabric-base phenolic cage riding on the outer ring lands.

Decoding the designation

In SKF’s super-precision scheme the 70 prefix is the ISO dimension series and 15 is the bore code, giving a 75 mm bore. CD sets the contact angle at 15°. P4A is SKF’s super-precision tolerance class, equivalent to ABEC 7 with P4A running accuracy on radial and axial runout. DGA is a preload class rather than a mounting direction: it denotes the light step on SKF’s universally matchable preload ladder, where DGB is medium and DGC is heavy.

What these specs mean in practice

A 15° contact angle biases the bearing towards speed and radial stiffness and carries less thrust than a 25° or 40° angle of the same envelope. The phenolic outer-ring-guided cage is light and tolerant of marginal lubrication, which is why this design runs to 11,000 rpm on oil. Light preload holds the balls in defined contact without the heat generation of a medium or heavy set, so the bearing suits high-speed machine tool spindles and grinding heads where thermal growth is the limiting factor.

Quantity and configuration

One bearing. Being universally matchable, any number of these can be assembled together in back-to-back, face-to-face or tandem arrangements and the light preload results automatically from clamping the rings.

Fitting notes

Mounting is by interference on both rings, with the straight bore fitted to a ground spindle journal. Oil lubrication is the design basis for the published speed rating. Preloaded bearings are set by ring clamping, so no radial internal clearance is specified for this execution.

Interchange guidance

Direct 15° super-precision equivalents in the same 75 x 115 x 20 mm envelope include the FAG B7015-C-T-P4S and the NSK 7015CTRP4, each in a matching light-preload universal execution. The 7015 ACD/P4A shares the envelope but carries a 25° angle, which makes it a related size rather than an interchange.