Fafnir2MM9110WISuper Precision Angular Contact Ball Bearing – Straight Bore, 50 mm ID, 80 mm OD, 16 mm Width, Open, 15° Contact Angle, Light Preload, Phenolic Outer-Land-Riding Cage, ISO P4S

Product Description

What this part is

Fafnir 2MM9110WI SUL super-precision angular contact ball bearing, single row, 9100WI spindle series, built by The Timken Company. Manufacturer Part Number: 2MM9110WI SUL. World Part Number: 7010C-T-P4S-SUL. 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

2MM — 15° contact angle, super-precision execution.

9110WI — 9100WI series on the ISO 7010 envelope, 50 x 80 x 16 mm, with a low shoulder on both rings.

CR — phenolic outer-land-riding cage.

SUL — single universally ground bearing at light preload.

Published ratings

Dynamic Radial Load Rating – 1M Revs (C1): 27,900 N (6,270 lbf) per bearing. C1 ISO Dynamic Radial Rating, per row: 25,300 N (5,670 lbf) per bearing. Static Radial Load Rating (C0): 20,800 N (4,670 lbf) per bearing. Limiting Speed – Grease: 16,300 rpm. Limiting Speed – Oil: 32,600 rpm. Contact Angle: 15°. Precision Rating: ISO P4S (ABEC 7/9). Precision Class: ABEC 7/9. Preload: Light. Cage Type: CR – phenolic outer-land-riding. Cage Material: Phenolic. Lubricant: grease or oil.

Mounting data

Maximum shaft fillet radius: 1 mm (0.039 in). Maximum housing fillet radius: 1 mm (0.039 in). Shaft Backing Shoulder Diameter: 56.1 mm (2.209 in). Housing Backing Shoulder Diameter: 74.2 mm (2.921 in).

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. Light preload gives the lowest heat generation of the three preload grades. Internal Clearance: N/A — a preloaded bearing is set by preload rather than by a clearance class. A machined phenolic laminate cage is light, so it loads the ball pockets very little at speed, it is self-lubricating, and guidance on the outer ring land keeps it stable at high speed.

Quantity and configuration

Unit Quantity: 1 Pc. Rows per Set: single. Arrangement / Configuration: single universally ground. Mounting Arrangement: universal single. Universal grinding means one bearing runs alone, or several stack back-to-back, face-to-face or in tandem and reach the light preload of the set.

Interchange guidance

Base Number: 7010. Searchable forms: 2MM9110WI, 2MM9110WISUL, 2MM9110WI SUL, 2MM-9110-WI, 2MM-9110-WI-SUL, 2MM9110WICRSUL, 7010C, 7010-C. Same-envelope 15° super-precision equivalents are written SKF 7010 CDGA/P4A, FAG B7010-C-T-P4S-UL and NSK 7010CTRP4. Cage material and precision class vary between makers inside those designations. The line passed from Fafnir to Torrington to Timken, and Timken lists 2MM9110WI SUL today.