MRC5208MFDouble Row Angular Contact Ball Bearing – 40 mm ID, 80 mm OD, 30.2 mm Width, Straight Bore, One Steel Shield, 30 Degree

Product Description

What this part is: MRC 5208MF double-row angular contact ball bearing. Bearing type: Double-row angular contact ball bearing. Bore: 40 mm. Outside Diameter: 80 mm. Overall Width: 30.2 mm (1-3/16 in). Contact Angle: 30°. Closure Type: One steel shield, opposite face open. Bore Type: Straight. Number Of Rows: 2. Rolling Elements: Ball. Material: Chrome bearing steel. Unit Quantity: 1 Pc. The envelope corresponds to an ISO 3208. Decoding the designation: 52 — MRC double-row angular contact series, two ball rows on offset raceways in one pair of rings. 08 — bore code giving Bore: 40 mm. F — Closure Type: one steel shield, the opposite face open. What these specs mean in practice: Contact Angle: 30°. Two rows set at opposing 30° angles let a single bearing seat carry heavy radial load together with thrust in both directions, which is what replaces a pair of single-row angular contacts and saves the axial length a duplex pair would need. Number Of Rows: 2. The doubled ball complement also raises radial capacity well above a single-row 6208 on the same shaft. One steel shield keeps swarf and coarse contamination out of the loaded side while the open face allows lubricant through from the housing. Quantity and configuration: Unit Quantity: 1 Pc. One bearing, shielded on one face, open on the other, straight bore. Fitting notes: Straight bore on an interference-fit shaft seat, outer ring located in a bored housing. The bearing locates the shaft in both axial directions on its own, so the second bearing on the shaft is normally a free position. The shielded face goes toward the side the contamination comes from. Mounting force is applied through the ring being fitted rather than across the balls. Interchange guidance: The 40 x 80 x 30.2 mm envelope is the ISO 3208 seat, so a 3208 from any maker fits the same shaft and housing — SKF 3208 A, FAG 3208-B and NSK 3208. A single-row 7208 shares the bore and outside diameter at a narrower 18 mm width and one ball row, so it is a different part rather than a substitution.