MRC5308FDouble-Row Angular Contact Ball Bearing – 40 mm Bore x 90 mm OD x 36.5 mm Width, 30°, One Shield

Product Description

What this part is: MRC 5308F double-row angular contact ball bearing with one metal shield. Bore: 40 mm. Outside Diameter: 90 mm. Overall Width: 36.5 mm (1-7/16 in). Contact Angle: 30°. Number Of Rows: 2. Rolling Elements: Balls. Bore Type: Straight. Closure Type: One shield, opposite face open. Material: Chrome steel. Unit Quantity: 1 Pc. Decoding the designation: 5300 — MRC’s double-row angular contact medium series. Two ball rows run on angled raceways inside a single pair of rings, so one bearing does the work of a back-to-back duplex pair in a single seat. 08 — the bore code. Multiplied by five it gives Bore: 40 mm. F — one shield, fitted to one face with the opposite face open. The shield retains grease on the exposed side of the assembly while the open face lets the housing feed and purge lubricant through the bearing. What these specs mean in practice: Contact Angle: 30° on both rows. The two rows lean in opposite directions, so the bearing takes thrust in both directions and resists overturning moments without a second bearing to react against. That is what makes a 53-series the standard choice for a short overhung shaft — a fan hub, a small pump impeller, a jackshaft pulley — where there is room for one bearing and the load arrives off-axis. Overall Width: 36.5 mm is roughly double a single-row 6308, and that width is where the moment stiffness comes from. Bore: 40 mm. Outside Diameter: 90 mm. Quantity and configuration: Unit Quantity: 1 Pc. One double-row bearing, straight bore, shielded on one face. Fitting notes: A double-row angular contact bearing is a locating bearing and is clamped axially on both rings, with the second position on the shaft left free to float. Mounting force is applied through the ring being fitted. The shielded face is normally turned outward, toward the contaminated side of the housing. Interchange guidance: The ISO interchange is a 3308 in the same shielded execution, and the carton carries the 3308-Z cross itself. A substitution matches on bore, outside diameter, width, contact angle and closure together. A 5308 in the open or twin-shielded execution shares the envelope and differs only in closure. Searchable variants: 5308F, 5308-F, 5308 F, 3308-Z, 3308Z, MRC 5308F.