FAGB7015CTPAP4ULSuper Precision Angular Contact Spindle Bearing 75x115x20 mm 15° ABEC 7 Polyamide Cage Light Preload

Product Description

What this part is

A FAG B7015-C-TPA-P4-UL super-precision angular contact spindle bearing with a 75 mm bore, a 115 mm outside diameter and a 20 mm width. It has a glass-fibre reinforced polyamide cage and is universally ground for light preload.

Decoding the designation

B7: FAG super-precision spindle bearing series. 015: 75 mm bore, 115 mm OD, 20 mm width. C: 15° contact angle in the FAG B7 scheme. TPA: glass-fibre reinforced polyamide cage, working temperature to 120 °C. P4: precision class 4, equivalent to ABEC 7. UL: universally ground, light preload.

What these specs mean in practice

A 15° contact angle carries load close to the radial plane, which keeps centrifugal ball loading low and lets the bearing run fast — the default angle for high-speed spindle work. Light preload keeps friction and heat generation low, so the spindle holds accuracy over long cycles rather than drifting as it warms; the trade is less axial stiffness than a medium or heavy set. The polyamide cage is light and quiet, tolerates acceleration well and copes with marginal lubrication, with a 120 °C ceiling that sets the limit on continuous hot running. Universal grinding means the ring faces are finished so any two bearings of this designation clamp into a light-preload set without shims, back-to-back, face-to-face or in tandem.

Published specifications

Bore: 75 mm (2.9528 in). Outside diameter: 115 mm (4.5276 in). Width: 20 mm (0.7874 in). Contact angle: 15°. Preload: light (L). Precision class: P4, ABEC 7. Cage material: glass-fibre reinforced polyamide. Cage temperature ceiling: 120 °C. Number of rows: 1. Rolling elements: steel balls. Closure: open. Grinding: universal.

Quantity and configuration

Supplied as 1 Pc, a single universally ground bearing.

Interchange guidance

Genuine equivalents are 15° ABEC 7 universally ground light-preload bearings in the same 75x115x20 mm envelope: NSK 7015CTRSULP4, SKF 7015 CD/P4A in light preload, RHP 7015CTSULP4 and Fafnir 2MM9115WI-SUL. The 25° build of this size, coded E by FAG and A5 by NSK, is a related size rather than an interchange, and a phenolic or brass cage version changes the temperature and speed limits.