Fafnir3MM9314WICRDULAngular Contact Ball Bearing – Straight Bore, 70 mm ID, 100 mm OD, 16 mm Width, Open, 25° Contact Angle, Light Preload, Single Universal.

Product Description

What this part is

Fafnir 3MM9314WI-CR-SUL super-precision angular contact ball bearing, 9300WI spindle range, 70 x 100 x 16 mm. Bore Diameter: 70 mm. Outside Diameter: 100 mm. Overall Width: 16 mm. Contact Angle: 25°. Precision Class: ABEC 7/9 / P4S. Dynamic Load Rating: 30,200 N. Static Load Rating: 27,300 N. Limiting Speed: 13,000 rpm grease; 23,600 rpm oil. Item Weight: 0.34 kg (0.76 lb). Preload: Light. Cage Material: Phenolic. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Bearing Material: Chrome steel. Number Of Rows: 1. Mounting Arrangement: Universal. Lubricant: grease or oil. Series: 9300WI. Base Number: 3MM9314WI. GTIN: 087796260870.

Decoding the designation

3MM — 25° contact angle.

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

9314 — 9300 spindle series, 70 mm bore, ISO 71914 envelope.

WI — low shoulder on both rings.

CR — phenolic 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: 30,200 N, rated over one million revolutions. Static Load Rating: 27,300 N. The two figures sit close together on this thin-section 9300 envelope, which is normal for the series.

Limiting Speed: 13,000 rpm grease; 23,600 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 Material: Phenolic. A machined phenolic cage is light, damps vibration and holds oil in its own structure.

Item Weight: 0.34 kg (0.76 lb).

Mounting data

Bore Type: Straight. Shaft backing shoulder diameter: 76.3 mm. Housing backing shoulder diameter: 94.3 mm. Maximum housing fillet radius the bearing corners will clear: 1 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.

Interchange guidance

Cross-Reference 1: Timken 71914E-T-P4S-SUL. Cross-Reference 2: FAG B71914-E-T-P4S-UL. Cross-Reference 3: SKF 71914 ACD/P4A. Cross-Reference 4: NSK 7914A5TRSULP4. Cross-Reference 5: IBC 71914-E-T-P4S-UL.

Cross-Reference 6: 2MM9314WI-CR-SUL shares the 70 x 100 x 16 mm envelope at a 15° contact angle and is a related size rather than a direct interchange.

Searchable forms of the designation: 3MM9314WICRSUL, 3MM9314WI-CR-SUL, 3MM 9314 WI CR SUL, 3MM9314WISUL, 7914-A, 7914A5.