Fafnir3MM214WICRDULAngular Contact Ball Bearing – Straight Bore, 70 mm ID, 125 mm OD, 24 mm Width, Open, 25° Contact Angle, Light Preload, Single Universal.

Product Description

What this part is

Fafnir 3MM214WI-CR-SUL super-precision angular contact ball bearing, 200WI spindle range, 70 x 125 x 24 mm. Bore Diameter: 70 mm. Outside Diameter: 125 mm. Overall Width: 24 mm. Total Width: 24 mm. Contact Angle: 25°. Precision Class: ABEC 7/9 / P4S. Dynamic Load Rating: 80,200 N. Static Load Rating: 57,400 N. Limiting Speed: 11,300 rpm grease; 20,600 rpm oil. Preload: Light. Cage Type: Phenolic outer-land-riding. Cage Material: Phenolic. Rolling Elements: Ball. Bearing Material: Chrome steel. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1. Mounting Arrangement: Universal. Lubricant: grease or oil. Design Units: Metric. Series: 200WI. Base Number: 3MM214WI.

Decoding the designation

3MM — 25° contact angle.

MM — Fafnir super-precision execution, ISO Class P4S, equivalent to ABEC 7/9.

214 — 200 spindle series, 70 mm bore, ISO 7214 envelope.

WI — low shoulder on both rings.

CR — phenolic outer-land-riding cage.

SUL — single universally ground bearing set for light preload.

What these specs mean in practice

Contact Angle: 25°. The steeper angle carries more thrust than a 15° execution on the same envelope and trades some top speed for axial stiffness.

Dynamic Load Rating: 80,200 N, rated over one million revolutions. Static Load Rating: 57,400 N.

Limiting Speed: 11,300 rpm grease; 20,600 rpm oil. Oil feed nearly doubles the ceiling because it carries heat out of the contact as well as lubricating it.

Preload: Light. Light preload gives the highest speed capability of the preload ladder and the lowest heat generation.

Cage Type: Phenolic outer-land-riding. Guiding the cage on the outer ring land steadies it at speed and gives the lubricant a defined path through the cage pockets.

Rolling Elements: Ball, steel. Precision Class: ABEC 7/9 / P4S, which buys tighter bore, outside diameter and raceway tolerances, closer shaft location and lower running vibration.

Mounting data

Bore Type: Straight. Shaft backing shoulder diameter: 80.3 mm. Housing backing shoulder diameter: 115.8 mm. Maximum housing fillet radius the bearing corners will clear: 1.5 mm. Outer ring to-clear radius: 1.5 mm.

Mounting Arrangement: Universal — universally ground faces allow this bearing to be stacked with further SUL bearings back-to-back, face-to-face or in tandem, taking up the light preload on assembly. The bearing is preload-established rather than clearance-set.

Quantity and configuration

Unit Quantity: 1 Pc. One single universally ground bearing. Total Width: 24 mm, which is the single-bearing stack height.

Interchange guidance

Cross-Reference 1: Timken 7214E-T-P4S-SUL. Cross-Reference 2: FAG B7214-E-T-P4S-UL. Cross-Reference 3: SKF 7214 ACD/P4A. Cross-Reference 4: NSK 7214A5TRSULP4. Cross-Reference 5: IBC 7214-E-T-P4S-UL.

Cross-Reference 6: 2MM214WI-CR-SUL shares the 70 x 125 x 24 mm envelope at a 15° contact angle and is a related size rather than a direct interchange.

Searchable forms of the designation: 3MM214WICRSUL, 3MM214WI-CR-SUL, 3MM 214 WI CR SUL, 3MM214WISUL, 7214A, 7214E.