MRC304SFFCGShielded Deep Groove Ball Bearing with Snap Ring – 20 mm Bore x 52 mm OD x 7/8 in Cartridge Width

Product Description

What this part is: MRC 304SFFCG single-row deep groove ball bearing with two shields and an outer-ring snap ring, built to cartridge width. Bore: 20 mm. Outside Diameter: 52 mm. Overall Width: 7/8 in (22.23 mm). Bore Type: Straight. Number Of Rows: 1. Rolling Elements: Balls. Closure Type: Two shields. Snap Ring Included: Yes. Internal Clearance: CN. Material: Chrome steel. Unit Quantity: 1 Pc. Decoding the designation: 3 — the 300 Medium series. For a 20 mm bore the medium series gives a 52 mm outside diameter and a heavier ball complement than the light series at the same shaft size. 04 — the bore code. Multiplied by five it gives Bore: 20 mm. S — Conrad deep groove construction, with both raceway shoulders unbroken, so the bearing carries radial load in any direction and axial load in either direction. FF — two shields, one each side. Non-contact metal closures that retain the factory grease charge and exclude coarse debris while adding almost nothing to running torque. C — cartridge width. The rings are ground to an inch width of 7/8 in rather than the 15 mm metric width of a standard 304, so the bearing fills a wider housing pocket and seats squarely against inch-dimensioned shoulders. G — snap ring, carried in a groove in the outer ring. The ring locates the bearing axially in a through-bored housing, so the housing needs no machined shoulder on that side. What these specs mean in practice: Bore: 20 mm. Outside Diameter: 52 mm. Overall Width: 7/8 in (22.23 mm). The snap ring turns a plain bored housing into a located seat, which is what makes this execution useful in electric-motor end bells and light gearbox covers where machining a shoulder is expensive. Closure Type: Two shields keeps the grease in place through the life of the charge and holds running torque close to that of an open bearing, so speed capability stays high. Internal Clearance: CN is the normal ABMA band, matched to an ordinary interference fit on the shaft with a location fit in the housing. Quantity and configuration: Unit Quantity: 1 Pc. Single row, straight bore, shielded both sides, snap ring fitted to the outer ring. Fitting notes: The bearing enters the housing snap-ring face last, and the ring seats against the housing counterbore face to set axial position. Mounting force is applied through the ring being fitted and is never transmitted across the balls. Both shields are retained in grooves in the outer ring and stay in place during assembly. Interchange guidance: An interchange has to match on all four of bore, outside diameter, cartridge width and snap-ring groove position. A standard 20 x 52 x 15 mm 304 or 6304 shares bore and outside diameter but runs to a different width and carries no snap ring, so it is a related size rather than a substitution. Searchable variants: 304SFFCG, 304-SFFCG, 304 SFFCG, 304SFF-CG, MRC 304SFFCG.