Fafnir2MM9132WIDULSuper-Precision Angular Contact Bearing – 160 mm ID, 240 mm OD, 38 mm Width, Open, 15° Contact Angle, Matched Duplex Pair

Product Description

What this part is

Fafnir 2MM9132WI-DUL super-precision angular contact ball bearing. Bore: 160 mm. Outside diameter: 240 mm. Width: 38 mm per bearing. Series: 2MM9100WI extra-light, equivalent to the ISO 70 series. Contact angle: 15°. Precision Class: P4S (ABEC 7/9). Single row per bearing, open on both faces, machined phenolic cage riding the outer-ring land. Country of origin as recorded on this listing: United States.

Decoding the designation

2 = 15° contact angle. MM = super high precision, P4S class. Steel balls. 91 = extra-light dimension series. 32 = 160 mm bore. WI = angular contact with a low shoulder on the outer ring. DU = duplex, universally matchable. L = light preload. ISO equivalent designation: 7032C. Searchable forms: 2MM9132WI-DUL, 2MM9132WIDUL, 2MM 9132 WI DUL, 2MM9132WICRDUL, 7032C.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity, which is the standard machine-tool spindle choice. The low outer-ring shoulder lets the phenolic cage ride the outer land, keeping the cage stable during rapid acceleration and reversal. P4S is a tighter grade than P4, holding bore and outer-ring runout closer and lowering spindle vibration.

Load ratings

Basic dynamic load rating Cr: 192.6 kN (43,300 lbf) per bearing. Basic static load rating C0r: 189.5 kN (42,600 lbf) per bearing. Mass: 5.18 kg (11.42 lb) per bearing.

Quantity and configuration

Two pieces ship, matching the DUL duplex designation. Rings are universally ground, so the pair mounts back-to-back, face-to-face or in tandem at the factory-set light preload.

Fitting notes

Total width across the mounted pair: 76 mm. As a preloaded matched pair the bearings carry no running clearance, so the internal clearance field reads N/A. The phenolic cage sets the operating temperature ceiling at 120 °C.

Interchange guidance

Direct equivalents at the same 15° angle and light preload: SKF 7032 CD/P4ADGA, NSK 7032CTRDULP4, RHP 7032CTRDULP4, GMN S6032CTA. Related size: 3MM9132WI shares the 160 x 240 x 38 mm envelope at a 25° contact angle, and 2MM9132WI-DUM is the same bearing at medium preload. Both are different parts rather than substitutions.