Fafnir5209WDouble Row Angular Contact Ball Bearing, 45 mm Bore x 85 mm OD x 30.17 mm Wide, 30 Degree Contact Angle, Snap-In Cage

Product Description

What this part is

The Fafnir 5209W is a double row angular contact ball bearing in the 5200 series. Bore (d): 45 mm (1.7717 in). Outside Diameter (D): 85 mm (3.3456 in). Width (C): 30.17 mm (1.188 in). Contact Angle: 30°. Number of Rows: 2. Rolling Elements: steel balls. Cage Type: snap-in. Design Units: metric. Two rows of balls run on a one-piece inner ring and a one-piece outer ring, so the axial clearance is ground in at the factory.

Load ratings

Dynamic Load Rating: 64,800 N (14,600 lbf), per bearing, radial rating C1 at one million revolutions. Static Load Rating: 51,500 N (11,600 lbf), per bearing, radial rating C0. Both figures are Timken catalogue values for this designation.

Mounting data

Shaft Backing Shoulder Diameter (da): 59.030 mm (2.324 in). Housing Backing Shoulder Diameter (Da): 76.560 mm (3.014 in). Maximum shaft fillet radius that the bearing corners will clear: 1 mm (0.039 in). Outer ring to-clear radius r: 1 mm (0.039 in). Those shoulder diameters are the abutment sizes that support the ring faces squarely.

What the 30 degree contact angle buys and costs

At 30° the load path runs steeply through the rings, which gives high thrust capacity and good axial stiffness in both directions. The trade is radial capacity and speed: a deep groove ball bearing on the same envelope spins faster and carries more pure radial load, and a 15° angular contact spins faster still. A 30° double row suits shafts where thrust and axial rigidity set the design.

Quantity and configuration

One bearing per unit. This is a self-contained double row bearing carrying thrust in both directions from a single position.

Interchange guidance

3209 is the ISO-style designation for a 45 x 85 x 30.2 mm double row angular contact ball bearing and is the number to search for the same envelope from other makers. Fafnir is a Timken brand, so current production of this number ships as Timken (Fafnir). Neighbouring variants 5209WD and 5209WG are separate part numbers with their own closures and cages.

Application types

Gearbox input shafts, pump shafts, blowers, screw conveyor drives, agitators and light machine tool spindles.