Product Description
What this part is
FAG 20209, a single-row barrel roller bearing. One row of barrel-shaped rollers runs on a spherical outer raceway, so the inner ring, roller set and cage swivel inside the outer ring. Boundary dimensions 45 mm bore × 85 mm outside diameter × 19 mm width. Cylindrical bore.
Decoding the designation
20 – barrel roller, single row2 – ISO dimension series09 – bore code, 9 × 5 = 45 mm boreno clearance suffix – CN, normal radial internal clearance
What these specs mean in practice
The barrel roller carries radial load and self-aligns on its spherical outer raceway, taking shaft deflection and housing misalignment without edge loading the rollers. Load is radial only. The single row of barrel rollers gives a larger contact footprint than a ball of the same envelope, so radial capacity is higher at lower speed.
Published specifications
Bore: 45 mm (1.7717 in)Outside diameter: 85 mm (3.3465 in)Width: 19 mm (0.7480 in)Rows: 1Bore form: cylindricalCage: pressed steelInternal clearance: CN (normal)
Quantity and configuration
1 Pc. Bearing only, cylindrical bore, mounted directly on the shaft seat.
Interchange guidance
Alternate written forms of the same bearing: 20209, 20209-TVP, 20209M. The tapered-bore 20209K is a related size with a different bore form. The 22209 is a double-row spherical roller bearing, a different bearing type.