Fafnir7212WNSUAngular Contact Ball Bearing – 60 mm ID, 110 mm OD, 22 mm Width, Open, 40° Contact Angle, Pressed Brass Cage, Universal Matching

Product Description

What this part is

Fafnir 7212WN-SU single-row angular contact ball bearing, built by The Timken Company. Bore: 60 mm. Outside Diameter: 110 mm. Overall Width: 22 mm. Contact Angle: 40°. Number Of Rows: 1. Rolling Elements: Balls. Bore Type: Straight. Closure Type: Open. Cage Material: Brass. Cage Type: Pressed. Precision Class: ABEC 3 / P6. Mounting Arrangement: Universal. Series: 72 medium section. Bearing Material: Bearing steel. Dynamic Load Rating: 56.0 kN / 12,600 lbf. Static Load Rating: 44.5 kN / 10,000 lbf. Limiting Speed: 4,720 rpm. Operating temperature range: -50 °C to 120 °C. Item Weight: 1.75 lbs. GTIN: 087796044104. Unit Quantity: 1 Pc.

Decoding the designation

7212: 60 mm bore, ISO 72 medium section, angular contact. WN: 40° contact angle in Fafnir’s lettering system. SU: a single bearing, universally ground, so any two will pair back-to-back, face-to-face or in tandem without shims. Searchable variants: 7212WNSU, 7212WN SU, 7212WN-SU, 7212-WNSU, 7212 WN SU.

What these specs mean in practice

A 40° contact angle is the steepest in the standard angular contact range, so it carries the highest thrust load available on this envelope and trades running speed for that capacity. Universal grinding holds the ring faces to a common width, so a second bearing of the same designation mounts against it and the pair sets its own preload. The pressed brass cage tolerates shock loading and runs cooler than a full-complement design. ABEC 3 / P6 tolerances are the standard commercial range.

Quantity and configuration

Unit Quantity: 1 Pc. One single bearing, universally ground, open on both faces.

Fitting notes

Straight bore, so the inner ring seats on a cylindrical shaft journal. A 40° bearing takes thrust in one direction, and the high shoulder sits on the side carrying it. Working range runs from -50 °C to 120 °C.

Interchange guidance

Same envelope and same 40° angle: SKF 7212 BE and MRC 7212DU. A 7212WN MBR is the same bearing with a machined bronze cage. A 2MM212WI or 3MM212WI shares the 60 x 110 x 22 mm envelope at 15° and 25° in super precision, which makes each a related size rather than a substitute.