Product Description
What this part is
FAG 20320-K-MB, 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 100 mm bore × 215 mm outside diameter × 47 mm width. Tapered bore, 1:12.
Decoding the designation
20 – barrel roller, single row3 – ISO dimension series, heavier section than the 202xx range on the same bore20 – bore code, 20 × 5 = 100 mm boreK – tapered bore, taper 1:12MB – machined brass cage, inner-ring guided
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 203 section is wider and larger in outside diameter than a 20220 on the same 100 mm shaft, which buys longer rollers and higher radial capacity. The machined brass cage runs at higher speed and temperature than a pressed steel cage.
Published specifications
Bore: 100 mm (3.9370 in)Outside diameter: 215 mm (8.4646 in)Width: 47 mm (1.8504 in)Rows: 1Bore form: tapered, 1:12Cage: machined brass, MBInternal clearance: CN (normal)
Quantity and configuration
1 Pc. Bearing only. Supplied without adapter sleeve.
Fitting notes
A tapered-bore barrel roller seats on an adapter sleeve when it goes onto a plain cylindrical shaft; the sleeve for a 20320K is an H320, whose shaft seat is 90 mm, one bore-code step below the bearing bore.
Interchange guidance
Alternate written forms of the same bearing: 20320-K-MB, 20320K.MB, 20320KMB, 20320K. The cylindrical-bore 20320MB is a related size on the same envelope with a different bore form. The 22320K is a double-row spherical roller bearing, a different bearing type.