Fafnir2MM9130WIDULAngular Contact Ball Bearing — 150 mm Bore, 225 mm OD, 35 mm Width, 15° Contact Angle, ABEC 7 / P4, Light Preload, Open

Product Description

What this part is

Fafnir 2MM9130WI-SUL super-precision angular contact ball bearing, a single universally ground bearing. Bore Diameter: 150 mm (5.906 in). Outside Diameter: 225 mm (8.858 in). Overall Width: 35 mm (1.378 in). Contact Angle: 15°. Precision Class: ABEC 7 / P4. Preload: Light. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1. The ISO size equivalent is 7030. Country of Origin: United States.

Decoding the designation

2MM — 15° contact angle, ABEC 7 / ISO P4 tolerance class.

9130 — Fafnir’s number for the ISO 7030 envelope, 150 x 225 x 35 mm.

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

SUL — single bearing, universally ground, light preload.

What these specs mean in practice

A 15° contact angle puts most of the load path radial. That buys speed and radial stiffness, and it is the angle used on machine tool spindles where the cutting load is predominantly radial.

ABEC 7 / P4 sets bore, outside diameter, width and running accuracy to ISO P4 tolerances.

Universal grinding is what the light preload code describes. Any two bearings of this designation stack as a matched duplex pair back-to-back (DB), face-to-face (DF) or in tandem (DT), and the ground ring faces set the preload without shims or selective fitting.

Quantity and configuration

Unit Quantity: 1 Pc. Single bearing, universally ground, light preload class.

Mounting data

Bore Diameter: 150 mm. Outside Diameter: 225 mm. Overall Width: 35 mm. Bore Type: Straight. Closure Type: Open. Snap ring: No. Harmonization Code: 8482.10.50.

Interchange guidance

Same envelope, 15° contact angle and super-precision class: SKF 7030 CD/P4A, FAG B7030-C-T-P4S-UL, NSK 7030CTRSULP4, NTN 7030C/GLP4, RHP 7030CTSULP4, Koyo 7030C. The current Timken catalogue designation is 2MM9130WISUL.