FAGB71911ETP4SDULAngular Contact Ball Bearing Matched Pair – 55 mm ID, 80 mm OD, 13 mm Width, Open, 25°, ABEC 7 / P4, Phenolic Cage

Product Description

What this part is

FAG B71911E.T.P4S.DUL is a matched pair of super-precision spindle angular contact ball bearings. Bore Diameter: 55 mm. Outside Diameter: 80 mm. Overall Width: 13 mm per bearing. Contact Angle: 25°. Number Of Rows: 1 per bearing. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Bearing Material: Chrome steel. Item Weight: 0.17 kg (0.38 lb) per bearing, 0.35 kg (0.77 lb) for the pair.

Decoding the designation

B719 — Schaeffler’s spindle bearing series in the extra-light 719 section.

71911 — ISO size code. Bore 55 mm, outside diameter 80 mm, width 13 mm.

E — Contact angle 25°. On a B70 or B719 designation the E is an angle code.

T — Fabric-base laminate phenolic cage, machined.

P4S — Precision Class: ABEC 7 / P4.

DUL — Duplex set of two bearings, universally ground, supplied matched.

What these specs mean in practice

Per bearing: Dynamic Load Rating: 22,200 N. Static Load Rating: 13,700 N. Limiting Speed: 15,000 rpm grease; 24,000 rpm oil. Fatigue load limit, radial: 1,450 N.

Precision Class: ABEC 7 / P4. Cage Material: Phenolic. Cage Type: Machined. Lubricant: grease or oil. Operating temperature range: -30 °C to +100 °C.

A 25° contact angle carries more thrust than a 15° execution of the same size and runs slower. A matched pair doubles the radial capacity of the position and adds the axial stiffness of the chosen arrangement. Series: B719. Base Number: B71911.

Mounting data

Preload per matched pair: light 149 N, medium 588 N, heavy 1,278 N.

Mounting Arrangement: Universal — the pair mounts back-to-back (O), face-to-face (X) or tandem, and reaches the published preload on assembly without shims. Internal Clearance: N/A; the set is preload-adjusted rather than clearance-set.

Quantity and configuration

Unit Quantity: 2 Pcs. One matched duplex set, ground and supplied as a pair.

Interchange guidance

Same-envelope, same-angle, same-class equivalents: SKF 71911 ACD/P4ADGA, NSK 71911A5DB and Koyo 71911CDB. Only same-angle duplex sets substitute here; a 15° pair of the same envelope is a related size with different axial stiffness.

Searchable forms of the number: B71911E.T.P4S.DUL, B71911ETP4SDUL, B-71911-E-T-P4S-DUL, B 71911 E T P4S DUL, 2MM9311WI CR DUL, 71911, 7911.