FAGB7010CBTP4SDULSuper Precision Angular Contact Ball Bearing Matched Duplex Pair 50 x 80 x 16 mm 15 Degree ABEC 7 Light Preload

Product Description

What this part is

A matched duplex pair of super-precision angular contact ball bearings in the FAG B-series spindle range, each 50 mm bore × 80 mm outside diameter × 16 mm width, in the ISO 7010 envelope.

Decoding the designation

B — FAG super-precision spindle bearing series.
7010 — single-row angular contact ball bearing, 100 light dimension series, bore code 10, giving a 50 mm bore.
C — 15° contact angle in the FAG scheme.
T — phenolic cage, fabric-reinforced laminate.
P4S — ABEC 7 dimensional accuracy with ABEC 9 running accuracy.
DUL — duplex, universally ground, light preload.

What these specs mean in practice

A 15° contact angle biases the bearing toward speed and radial rigidity, and carries less thrust than a 25° bearing in the same envelope. Light preload keeps ball-to-race contact loads and heat generation low, which suits high-speed spindles where thermal growth rather than stiffness sets the limit; the DUM and DUH versions trade that speed headroom for axial stiffness. The 100 series is the light envelope, so at 50 mm bore the 80 mm outside diameter keeps rotating mass and pitch diameter down. A phenolic cage is light and self-lubricating and places the working temperature ceiling near 120 °C.

Published specifications

Bore: 50 mm (1.9685 in)
Outside diameter: 80 mm (3.1496 in)
Width per bearing: 16 mm (0.6299 in)
Stack width, pair: 32 mm (1.2598 in)
Contact angle: 15°
Precision class: P4S — ABEC 7 dimensional, ABEC 9 running
Preload: light (L)
Rows per bearing: 1
Cage material: phenolic
Rolling elements: steel balls
Closure: open, both faces
ISO base number: 7010 C

Quantity and configuration

Matched duplex pair, 2 Pcs. The two bearings are ground as a set, and the pair carries the light preload as supplied.

Fitting notes

Mounting is an interference fit on the shaft and a close fit in the housing bore, both held to super-precision spindle limits. The pair goes onto the shaft in the orientation marked on the rings, with the scribe lines aligned; faces seat against square ground shoulders, and a runout error at the shoulder transfers directly into the raceway.

Interchange guidance

Same-spec 15° P4 light-preload duplex equivalents in other schemes are the SKF 7010 CD/P4ADGA, NSK 7010CTYDUL, SNR 7010CVDUJ74 and Timken Fafnir 2MM9110WI-DUL. The B7010-E at 25°, and the DUM and DUH preload versions, are related sizes rather than interchanges.