Fafnir2MM9132WISULAngular Contact Bearing – 160 mm ID, 240 mm OD, 38 mm Width, Open, 15° Contact Angle

Product Description

What this part is

Fafnir 2MM9132WI-SUL super-precision angular contact ball bearing, 160 mm bore, 240 mm outside diameter, 38 mm width. Single row, open on both faces, machined phenolic cage, 15° contact angle. The ISO equivalent envelope is a 7032 series bearing.

Decoding the designation

The leading 2MM sets the contact angle at 15°, and the MM prefix identifies the Fafnir super-precision spindle range built to P4S tolerances. 9132 is the Fafnir series and size code, corresponding to the ISO 7000 dimension series in size 32 — a 7032 envelope. WI denotes the super-precision angular contact construction. SU marks the bearing as universally ground, and the trailing L calls out light preload.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity; a 25° bearing in the same envelope carries more thrust and runs slower. The machined phenolic cage is light and self-lubricating, which suits high surface speeds and grease or oil-mist lubrication. P4S tolerances hold running accuracy tight enough for machine tool spindles and precision ball screw supports.

Quantity and configuration

One bearing. Universal grinding means the faces are machined so that two or more bearings can be mounted back-to-back, face-to-face or in tandem in any combination, and the light preload rating describes the preload developed when a pair is clamped together.

Fitting notes

Straight cylindrical bore, so the bearing mounts directly on a ground shaft seat. Both faces are open, and lubrication is supplied by the spindle system. Rated limiting speed is 3600 rpm.

Interchange guidance

The same-spec 15° light-preload universal equivalents are the SKF 7032 CDGA/P4A and the NSK 7032CTYNSULP4, the NSK carrying a polyamide cage in place of the phenolic. A 3MM9132WI bearing shares the envelope but has a 25° contact angle, making it a related size rather than an interchange.