Fafnir2MM213WICRDUHAngular Contact Ball Bearing – 65 mm ID, 120 mm OD, 23 mm Width, 15° Contact Angle, Heavy Preload Duplex Pair, ABEC 7/9

Product Description

What this part is

Fafnir 2MM213WI-CR-DUH super-precision angular contact ball bearing, 200WI spindle series, 65 x 120 x 23 mm. Timken world part number 7213C-T-P4S-DUH. Bore Diameter: 65 mm. Outside Diameter: 120 mm. Overall Width: 23 mm per bearing. Total Width: 46 mm for the mounted pair. Contact Angle: 15°. Precision Class: ABEC 7/9 / P4S. Cage Type: Outer-ring land riding. Cage Material: Phenolic. Rolling Elements: Ball. Bearing Material: Chrome steel. Bore Type: Straight. Closure Type: Open. Design Units: Metric.

Decoding the designation

2 — 15° contact angle.

MM — Fafnir super-precision spindle execution, ISO P4S tolerance class.

213 — 200 series, bore code 13, giving a 65 mm bore.

WI — low shoulder on both rings, the spindle bearing form.

CR — phenolic outer land riding cage.

DUH — duplex pair, heavy preload.

What these specs mean in practice

Dynamic Load Rating: 77,400 N per bearing. Static Load Rating: 54,700 N. Limiting Speed: 12,100 rpm grease; 24,200 rpm oil. Lubricant: grease or oil.

A 15° contact angle favours rotational speed over thrust capacity, giving the 24,200 rpm oil figure. Heavy preload raises axial and radial stiffness and holds shaft position under changing load. Preload and internal clearance are mutually exclusive, so Internal Clearance: N/A.

The cage is guided on the outer ring land rather than on the balls, which steadies it at high speed. Phenolic absorbs and releases lubricant, suiting continuous spindle duty.

Mounting data

Shaft Backing Shoulder Diameter: 75.7 mm (2.980 in). Housing Backing Shoulder Diameter: 109.7 mm (4.320 in). Maximum housing fillet radius that the bearing corners will clear: 1.5 mm (0.059 in). Outer ring to-clear radius: 1.5 mm (0.059 in).

Quantity and configuration

Unit Quantity: 2 Pcs. Number Of Rows: 1 per bearing, 2 rows per set. Mounting Arrangement: duplex pair, heavy preload. Rows per set: duplex. The pair is ground as a matched set and stacks to 46 mm on the shaft seat.

Interchange guidance

Timken 7213C-T-P4S-DUH, SKF 7213 CD/P4ADGC, FAG B7213-C-T-P4S-DUH, NSK 7213CTRDUHP4 and RHP 7213CTDUHP4 share the 65 x 120 x 23 mm envelope, the 15° angle, P4S tolerance and heavy preload. A standard-precision 7213C matches the envelope and the angle at a looser tolerance class.