SKF3206A2RS1TN9Double-Row Angular Contact Ball Bearing, 30 x 62 x 23.8 mm, Sealed Both Faces, Polyamide Cage

Product Description

What this part is

An SKF 3206 A-2RS1TN9/MT33 double-row angular contact ball bearing, 30 mm bore, 62 mm outside diameter, 23.8 mm width (15/16 in), sealed on both faces. Two rows of balls run on angled contact lines set back to back within a single pair of rings, so one bearing does the work that two opposed single-row angular contact bearings would otherwise do.

Decoding the designation

The 32 series is the double-row angular contact series and the bore code 06 gives 30 mm. A is SKF’s design designation for this family, with the two rows set back to back on a nominal 30° contact angle. 2RS1 is a contact seal on each face, made of nitrile rubber on a sheet steel insert. TN9 is a glass-fibre reinforced polyamide 6,6 cage, with a working temperature ceiling of 120 °C. MT33 is the factory grease fill. The 5206 designation carried on cartons of this size is the older American number for the same envelope.

What these specs mean in practice

A double-row angular contact bearing takes radial load together with thrust in both directions and resists moment loads, because the two back-to-back contact lines diverge and give the bearing a wide effective load span from a single unit. That is what makes it the standard choice for a shaft carrying an overhung load in one bearing position — a pump impeller, a fan wheel, a gearbox output pinion. The polyamide cage runs quieter and lighter than a pressed steel cage and takes shock well, and its 120 °C ceiling is the figure that governs where it can be used. Contact seals on both faces retain the grease fill and exclude dirt, which makes the bearing a sealed-for-life unit rather than one relubricated through the housing; they also add drag and cap the speed against an open bearing of the same size.

Quantity and configuration

1 Pc. Straight bore, sealed both faces, grease filled at manufacture.

Fitting notes

Mounting force is applied through the ring being fitted and is never transmitted across the balls from one ring to the other. A sealed bearing is mounted without heating beyond the seal material’s limit, so a cold press fit or an induction heater with a temperature limit is used rather than an oil bath.

Interchange guidance

Same-envelope, same-configuration equivalents are FAG 3206-BD-2HRS-TVH, NSK 3206B-2RSTN and NTN 5206S, all 30 x 62 x 23.8 mm double-row angular contact bearings sealed both faces. The open SKF 3206 A and the shielded 3206 A-2Z share the envelope but differ in closure, and a 3306 is the heavier 33 series at the same bore; those are related sizes rather than substitutions.