FafnirW309KLLWide Inner Ring Ball Bearing – 45 mm Bore, 100 mm OD, 39.67 mm Width, Land-Riding Seals Both Sides

Product Description

What this part is: Fafnir W309KLL wide inner ring ball bearing, built by The Timken Company. Bore Diameter: 45 mm. Outside Diameter: 100 mm. Overall Width: 39.67 mm (1.562 in). Series: 300. Base Number: W309. Closure Type: Contact seals both sides. Bore Type: Straight. Number Of Rows: 1. Rolling Elements: Ball. Bearing Material: Chrome steel. Lubricant: Grease. Item Weight: 1.29 kg (2.84 lb). Decoding the designation: W — wide inner ring execution. The ring section is extended to 39.67 mm against the 25 mm of a standard 6309, giving a longer shaft seat and a broader bearing seat in the housing. 309 — 300 medium series, bore code 09, giving a 45 mm bore in a 100 mm outside diameter. KLL — land-riding seals both sides. Each seal lip runs on a machined land of the inner ring, in contact, sealing the grease charge on both faces. What these specs mean in practice: Dynamic Load Rating: 58,700 N. Static Load Rating: 31,600 N. Limiting Speed: 4,830 rpm grease; 5,520 rpm oil. Precision Class: ABEC 1 / P0. Internal Clearance: CN. The extra ring width is what this part is for. A wide inner ring spreads the shaft contact over a longer seat, which steadies a shaft that is otherwise supported at only one point and resists the cocking moment that a narrow bearing passes straight into the raceway. The 58,700 N dynamic rating is the load at which the bearing reaches one million revolutions of calculated fatigue life; the 31,600 N static rating governs shock and standstill duty. Land-riding contact seals hold the factory grease charge and keep dust and washdown water out of the raceway. Mounting data: Maximum shaft fillet radius: 1.5 mm (0.059 in). Straight cylindrical bore, 45 mm, mounted by interference fit on the shaft. Quantity and configuration: Unit Quantity: 1 Pc. One complete sealed bearing per unit. Interchange guidance: The W309 envelope is a Fafnir wide-series size and is 39.67 mm across the rings. A standard 6309 shares the 45 mm bore and 100 mm outside diameter at 25 mm width, so it fits the same bore and shaft diameter over a shorter seat. Every equivalent is listed individually in the Cross-Reference attributes and labelled with how it relates.