Fafnir2MM9110WICRDUHSuper Precision Angular Contact Ball Bearing – Straight Bore, 50 mm ID, 80 mm OD, 16 mm Width, Open, 15° Contact Angle, Heavy Preload, Phenolic Outer-Land-Riding Cage, ISO P4S

Product Description

What this part is

Fafnir 2MM9110WI CR SUH super precision angular contact ball bearing, single row, 9100WI spindle series. Manufacturer Part Number: 2MM9110WI CR SUH. Bore: 50 mm. Outside Diameter: 80 mm. Bearing Width: 16 mm. Total Width: 16 mm. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Rolling Elements: Steel balls. Design Units: Metric.

Decoding the designation

Contact Angle: 15°, carried by the 2MM prefix. Series: 9100WI, which maps to the ISO 70xx light section, so the 9110 is a 7010 envelope at 50 x 80 x 16 mm. WI: low shoulder on both rings. CR: phenolic outer land riding cage. SU: single universally ground. H: heavy preload. Precision Class: ISO P4S, equivalent to ABEC 7/9. Preload: Heavy. Mounting Arrangement: Universal single.

Published ratings

Dynamic Radial Load Rating – 1M Revs (C1): 27,900 N (6,270 lbf). C1 ISO Dynamic Radial Rating, per row: 25,300 N (5,670 lbf). Static Radial Load Rating (C0): 20,800 N (4,670 lbf). Limiting Speed, grease: 16,300 rpm. Limiting Speed, oil: 32,600 rpm. These are single-bearing figures.

Mounting dimensions

Max Shaft Fillet Radius: 1 mm. Outer Ring To Clear Radius: 1 mm. Shaft Backing Shoulder Diameter: 56.1 mm. Housing Backing Shoulder Diameter: 74.2 mm.

What these specs mean in practice

A 15° contact angle is the high-speed setting in this family. More of the load line runs radially, the ball set does less centrifugal and gyroscopic work, and the bearing carries a higher limiting speed than the 25° execution on the same envelope.

Heavy preload is the stiffest of the three universal settings. It holds the spindle nose closest to position under a changing cut and gives the highest axial and radial rigidity of the UL, UM and UH ladder, at higher running heat. Internal Clearance: N/A — a preloaded bearing is defined by its preload rather than by a clearance class.

Cage Type: CR, phenolic outer land riding. Cage Material: Phenolic. A machined phenolic laminate cage is light, so it loads the ball pockets very little at speed, it is self lubricating, and it damps rather than rings. Guidance on the outer ring land keeps it stable at high speed.

Quantity and configuration

Unit Quantity: 1 Pc. Rows per Set: single. Universal grinding means one bearing runs alone, or several stack back to back, face to face or in tandem and reach the heavy preload of the set.

Interchange guidance

Base Number: 7010. MPN Variants: 2MM9110WICRSUH, 2MM9110WI CR SUH, 2MM-9110-WI-CR-SUH, 2MM9110WICRDUH, 2MM9110WI, 7010C, 7010-C. Same-envelope 15° heavy-preload super precision equivalents are written SKF 7010 CD/P4ADGC, FAG B7010-C-T-P4S-UH and NSK 7010C. Cage material and precision class vary between makers inside those designations. The line passed from Fafnir to Torrington to Timken, and Timken lists the 2MM9110WI CR family today.