SKF7015ACGAP4Super-Precision Angular Contact Ball Bearing 75x115x20 mm 25° ABEC 7 Light Preload Universally Matchable

Product Description

What this part is

An SKF 7015 ACGA/P4 super-precision single-row angular contact ball bearing, 75 mm bore by 115 mm outside diameter by 20 mm width. The 7015 designation is the ISO 70-series thin-section angular contact envelope. It is a spindle bearing for machine tools, grinding heads, high-speed gearboxes and precision rotary tables.

Decoding the designation

Base number: 7015, a single-row angular contact ball bearing, 75 x 115 x 20 mm. AC: 25° contact angle in the SKF scheme. GA: universally matchable, giving light preload when two bearings are paired. P4: ABEC 7 precision class.

What these specs mean in practice

A 25° contact angle sits in the middle of the super-precision range. It carries considerably more thrust and offers more axial stiffness than a 15° bearing of the same envelope, while still running fast. That suits milling and drilling spindles where the cut generates axial force alongside radial force.

The 70-series section is slim for its bore, so the bearing fits spindle housings with limited radial space and lets several bearings stack within a short nose length.

The GA designation is what makes the bearing flexible in a spindle build: the ring faces are ground so that any two bearings of this designation form a set at a defined light preload in back-to-back, face-to-face or tandem arrangement, with no shimming or measurement. Light preload is the low-heat, high-speed choice — it gives less stiffness than medium or heavy preload and runs cooler, which is why grinding and high-rpm spindles specify it.

ABEC 7 holds bore, outside diameter and running accuracy to super-precision limits, and that accuracy is only realised on shaft and housing seats machined to a comparable standard.

Published specifications

Bore: 75 mm. Outside diameter: 115 mm. Width: 20 mm. Rows: 1. Contact angle: 25°. Precision class: ABEC 7 / ISO P4. Preload when paired: light. Closure: open. Rolling elements: steel balls.

Quantity and configuration

This listing supplies one bearing. 1 Pc. Building a matched pair or triplet requires additional bearings of the same designation. Spacer rings, lock nuts and housings are supplied separately.

Interchange guidance

Genuine equivalents are 7015-envelope super-precision bearings at 25° with light preload and P4 class, including Fafnir 3MM9115WI-CR-SUL, NSK 7015A5TRSUL and FAG B7015E.T.P4S.UL. Bearings of this envelope at a 15° contact angle, at medium or heavy preload, or at P0 or P5 class are different parts — the contact angle and preload set spindle stiffness and thrust capacity, so matching the 75 x 115 x 20 mm envelope alone does not match the bearing.