FAGSuper Precision Angular Contact Ball Bearing Matched Duplex Pair 80 x 125 x 22 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 80 mm bore × 125 mm outside diameter × 22 mm width, in the ISO 7016 envelope.

Decoding the designation

B — FAG super-precision spindle bearing series.
7016 — single-row angular contact ball bearing, ISO 70 series, bore code 16, giving an 80 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. A phenolic cage is light and self-lubricating, which is why it is standard on grinding and milling spindles, and it places the working temperature ceiling near 120 °C.

Published specifications

Bore: 80 mm (3.1496 in)
Outside diameter: 125 mm (4.9213 in)
Width per bearing: 22 mm (0.8661 in)
Stack width, pair: 44 mm (1.7323 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: 7016 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

15° P4 light-preload duplex bearings in other schemes include the Timken Fafnir 2MM9116WI CR DUL, SKF 7016 CD/P4ADGA, NSK 7016CTYDUL and RHP 7016CTDULP4. The B7016-E variant at 25°, and the DUM and DUH preload versions, are related sizes rather than interchanges.