FAGB7216CTPAP4K5UMSuper Precision Angular Contact Ball Bearing 80 x 140 x 26 mm 15 Degree ABEC 7 Medium Preload Polyamide Cage

Product Description

What this part is

A single-row super-precision angular contact ball bearing in the FAG B-series spindle range, 80 mm bore × 140 mm outside diameter × 26 mm width, in the ISO 7216 envelope.

Decoding the designation

B — FAG super-precision spindle bearing series.
7216 — single-row angular contact ball bearing, 200 medium dimension series, bore code 16, giving an 80 mm bore.
C — 15° contact angle in the FAG scheme.
TPA — glass-fibre reinforced polyamide cage.
P4S — ABEC 7 dimensional accuracy with ABEC 9 running accuracy.
UM — universally ground single bearing, medium preload.

What these specs mean in practice

A single-row angular contact ball bearing takes thrust in one direction only, which is why these bearings are normally used in pairs or stacks so the arrangement carries thrust both ways. A 15° contact angle biases the bearing toward speed and radial rigidity, and carries less thrust than a 25° bearing in the same envelope. Medium preload sits between the low-heat light setting and the maximum-stiffness heavy setting, and is the usual default where a spindle needs both rigidity and speed.

The 7216 is the heavier of the two 80 mm bore options: against a 7016 in the same bore it puts a larger ball complement on a bigger pitch diameter, which buys load capacity and stiffness and costs speed. A glass-fibre reinforced polyamide cage is lighter and quieter than machined brass and places the continuous working temperature ceiling near 120 °C.

Published specifications

Bore: 80 mm (3.1496 in)
Outside diameter: 140 mm (5.5118 in)
Width: 26 mm (1.0236 in)
Contact angle: 15°
Precision class: P4S — ABEC 7 dimensional, ABEC 9 running
Preload: medium (M)
Rows: 1
Cage material: glass-fibre reinforced polyamide (PA66)
Rolling elements: steel balls
Closure: open, both faces
ISO base number: 7216 C

Quantity and configuration

Single bearing, 1 Pc. Universal grinding allows it to be stacked back-to-back, face-to-face or in tandem with matching bearings of the same designation.

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. Faces seat against square ground shoulders, and a runout error at the shoulder transfers directly into the raceway. A polyamide cage suits induction heating of the inner ring only within the cage temperature limit.

Interchange guidance

Same-spec 15° P4 medium-preload single equivalents in other schemes are the SKF 7216 CD/P4A, NSK 7216CTYSUM, RHP 7216CTSUMP4 and Timken Fafnir 2MM216WI-SUM. The B7216-E at 25°, the UL and UH preload versions, and the 7016 in the lighter series at the same 80 mm bore are related sizes rather than interchanges.