FAG20209-K-C3Barrel Roller Bearing — 45 mm ID, 85 mm OD, 19 mm Width, 1:12 Tapered Bore, C3 Clearance, Single Row, Open

Product Description

What this part is:

FAG 20209-K-C3, a single-row barrel roller bearing with a tapered bore. Bore: 45 mm. Outside Diameter: 85 mm. Overall Width: 19 mm. Bore Type: 1:12 tapered. Number Of Rows: 1. Rolling Elements: convex barrel rollers. Closure Type: open. Internal Clearance: C3. Dynamic Load Rating: 52 kN. Static Load Rating: 57 kN. Fatigue Limit Load: 5.9 kN. Limiting Speed: 4,000 r/min. Mass: 0.441 kg. Adapter sleeve: H209. Country of origin as marked: Germany.

Decoding the designation:

202 — FAG’s single-row barrel roller series, one row of convex rollers running on a sphered outer raceway.

09 — the bore code, 09 x 5 = 45 mm.

K — 1:12 tapered bore, mounts on an H209 adapter sleeve.

C3 — radial internal clearance greater than normal.

What these specs mean in practice:

Dynamic Load Rating: 52 kN. Static Load Rating: 57 kN. Fatigue Limit Load: 5.9 kN. Limiting Speed: 4,000 r/min. The sphered outer raceway lets the roller set and inner ring swivel inside the outer ring, so the bearing accepts substantial shaft deflection and housing misalignment while carrying a heavy radial load. One row of convex rollers is what distinguishes it from a two-row spherical roller bearing of the same envelope: it is a purely radial type with high misalignment tolerance. Internal Clearance: C3, greater than normal, which is what a tapered-bore mounting calls for — driving the inner ring up the sleeve taper expands it and consumes clearance, so the assembly starts above normal to finish at the right figure. Mass: 0.441 kg.

Mounting data:

Bore: 45 mm, 1:12 taper. Outside Diameter: 85 mm. Overall Width: 19 mm. The 45 mm tapered bore seats on an H209 adapter sleeve, whose tapered outside diameter is 45 mm over a 40 mm cylindrical shaft seat, secured with a KM 9 locknut and an MB 9 lockwasher. Radial internal clearance is set by measured drive-up on the taper.

Quantity and configuration:

Unit Quantity: 1 Pc. Supplied as a single bearing.

Interchange guidance:

Manufacturer part number variants: 20209K.C3, 20209-K-C3, 20209KC3, 20209 K, 20209. Related executions on the same 45 x 85 x 19 mm envelope: 20209-TVP-C3 is the straight-bore version and 20209-K-TVP-C3 carries the same tapered bore with a glass-fibre polyamide cage. A 21309 or 22209 spherical roller bearing shares the bore but is a two-row type with a different section and load profile, so it is a related size rather than an interchange.