Fafnir2MMV9115WIQULAngular Contact Ball Bearing — 75 mm Bore, 115 mm OD, 20 mm Width, 15° Contact Angle, ABEC 7 / P4S, Phenolic Cage, Light Preload, Quadruplex

Product Description

What this part is

Fafnir 2MMV9115WI-CR-QUL super-precision angular contact ball bearing, supplied as a four-bearing matched quad set. Bore Diameter: 75 mm (2.953 in). Outside Diameter: 115 mm (4.528 in). Overall Width: 20 mm (0.787 in) per bearing. Total Width: 80 mm across the mounted set. Contact Angle: 15°. Precision Class: ABEC 7 / P4S. Running Accuracy: ABEC 9 / ISO P2. Cage Material: Phenolic. Preload: Light. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. The ISO size equivalent is 7015. Country of Origin: United States.

Decoding the designation

2MMV — 15° contact angle at ISO P4S. Dimensional tolerances are held to ABEC 7 / ISO P4 and running accuracy to ABEC 9 / ISO P2. Bore and outside diameter are micron-coded for selective fit.

9115 — Fafnir’s number for the ISO 7015 envelope, 75 x 115 x 20 mm.

WI — low shoulder on both rings, the duplex grinding form.

CR — one-piece machined phenolic cage.

QUL — quadruplex, universally ground, light preload. Four single-row bearings ground as one matched set.

What these specs mean in practice

P4S is the grade above P4 in the Fafnir super-precision range. The body is built to ABEC 7 dimensional tolerances while the raceways are ground and gauged to ABEC 9 running accuracy, so radial and axial runout are held to the tighter class. The micron-coded bore and outside diameter let a spindle builder select rings against a measured housing and shaft.

A 15° contact angle keeps the load path close to the radial plane. That is the angle used on machine tool spindles running at speed under a predominantly radial cutting load.

Phenolic is a light, self-lubricating cage material and runs quiet at spindle speeds. It is the standard cage across the Fafnir 9100WI super-precision range.

Quantity and configuration

Unit Quantity: 4 Pcs. Four bearings ground as one factory-matched quad set. Universal grinding lets the set be stacked in the combinations the spindle calls for, and the ground ring faces carry the light preload. The set runs preload-set and carries no internal clearance code.

Mounting data

Bore Diameter: 75 mm. Outside Diameter: 115 mm. Overall Width: 20 mm per bearing, 80 mm for the four stacked. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1 per bearing. Snap ring: No. Harmonization Code: 8482.10.50.28.

Interchange guidance

Same envelope, 15° contact angle and super-precision class: SKF 7015 CD/P4AQFC, FAG B7015-C-T-P4S-QUL, NSK 7015CTRQULP4, RHP 7015CTQULP4, NTN 7015C/GLP4, Koyo 7015C. The current Timken catalogue designation is 2MMV9115WICRQUL.