FafnirM314KBRPrecision Deep Groove Ball Bearing – Straight Bore, 70 mm ID, 150 mm OD, 35 mm Width, Open, ABEC 5, Machined Bronze Cage, CN Clearance.

Product Description

What this part is

Fafnir M314KBR precision deep groove ball bearing, 300 heavy series. Brand: Fafnir (Timken). Part Number: M314KBR. Bore: 70 mm. Outside Diameter: 150 mm. Overall Width: 35 mm. Design Units: Metric. Number Of Rows: 1. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Bearing Material: Chrome bearing steel. Item Weight: 5.5 lbs.

Decoding the designation

Precision Class: P5. Precision Rating: ABEC 5. Cage Material: Bronze. Cage Type: Machined. Internal Clearance: CN. Series: 300, Fafnir’s heavy dimension series — an M314 carries the ISO 6314 envelope. The BR suffix marks the machined bronze cage.

What these specs mean in practice

Dynamic Load Rating: 111 kN. Static Load Rating: 68 kN. Limiting Speed: 5000 rpm. The heavy 300 section puts a thick ring cross-section around a 70 mm shaft, which is what buys the load rating for the bore size. ABEC 5 tightens bore, outside diameter and running accuracy over a standard-tolerance bearing, so the shaft runs truer and the bearing generates less vibration. A machined bronze cage tolerates higher temperature and thinner lubricant films than a pressed steel cage and stays dimensionally stable under load. Lubricant: oil or grease. Max Temp: 121°C. Min Temp: -54°C. Running Accuracy – Radial And Axial Runout: Normal.

Quantity and configuration

Unit Quantity: 1 Pc. Open on both faces, so lubricant reaches the ball track directly from the housing.

Interchange guidance

Cross-References: 6314 P5, SKF 6314 M/P5, FAG 6314-M-P5, NSK 6314M P5. Each shares the 70 x 150 x 35 mm envelope and the ABEC 5 tolerance class. Harmonization Code: 8482.10.50.

Designation variants

MPN Variants: M314KBR, M-314-K-BR, M 314 K BR, M314K-BR, 6314 MB/BR P5, 6314-P5.