SKF4212-ATN9Deep Groove Ball Bearing, Double Row – Straight Bore, 60 mm ID, 110 mm OD, 28 mm Width, Open, Glass-Fibre Polyamide Cage, CN Clearance, Without Snap Ring

Product Description

What this part is

An SKF 4212 ATN9 double-row deep groove ball bearing, 60 mm bore, 110 mm outside diameter, 28 mm width. Open on both faces, straight bore, one-piece injection-moulded polyamide cage.

Decoding the designation

42 is SKF’s double-row deep groove series and 12 the bore code, giving the 60 mm bore. The A marks the modified internal design used across the current 4200-series execution. TN9 is a glass-fibre reinforced polyamide 6,6 cage. No clearance suffix follows, so the bearing is CN, normal radial internal clearance, and no tolerance suffix follows, so it is normal class – P0 in the ISO scheme, ABEC 1 in the ANSI scheme.

What these specs mean in practice

Two rows of balls in deep grooves double the radial rating over a single-row bearing of the same envelope while keeping the deep groove raceway, so axial load is carried in both directions rather than one. Dynamic radial rating 49.4 kN (11,100 lbf), static radial rating 44 kN (9,890 lbf), limiting speed 5,000 rpm. The polyamide cage runs quieter and lighter than pressed steel and sets the practical upper operating temperature at 120 °C; above that a brass or steel cage execution is the appropriate choice. Mass 1.94 lb.

Quantity and configuration

One bearing per unit. A single 4212 ATN9 locates a shaft axially in both directions without a second bearing to oppose it, so it substitutes for a paired arrangement in short-shaft positions.

Fitting notes

The bearing is open and greasable in service, but carries no filling holes or lubrication groove, so relubrication reaches the raceways through the open faces. Both rings are one piece and non-separable.

Interchange guidance

The FAG 4212-B-TVH is the direct equivalent: double-row deep groove, 60 x 110 x 28 mm, glass-fibre polyamide cage. The NSK 4212 and Timken 4212 are the same ISO designation. A 4212 execution ending in M or ATN carries a different cage material and is a related size where cage temperature limit or shock capacity matters.