The Timken 223 Series is the most widely used heavy-industrial spherical roller bearing in the Timken lineup — double-row, self-aligning, with a wider cross-section than the 222 Series and higher radial/axial load ratings. With over three hundred variants across bores from 40 mm to 280 mm, the 223 is the default heavy-duty choice for gearbox shafts, conveyor pulleys, fans and blowers, large pump shafts, agitators, paper-machine rolls, and rolling-mill drive components.

• Construction: Double-row self-aligning, wide cross-section — compensates for shaft misalignment up to 1º under sustained heavy radial load with moderate axial thrust tolerance.
• Cage options: Both brass machined finger (“EM” suffix, slight majority) and steel stamped window (“EJ” suffix) variants — brass machined standard on heavier sizes and shock-service.
• Bore types: Both cylindrical (straight) and tapered (“K” suffix) bore variants available across the full range.
• Relubrication: W33 feature (oil groove + three holes in outer ring) standard on most variants; W506, W800, W841 and similar specialty feature packs on OEM-specific builds.
• Clearance classes: C0, C2, C3, C4 available — C3 or C4 recommended for elevated-temperature and interference-fit mounts.
• Bore range: 40 mm – 280 mm (1.57 in – 11.02 in).
• Width range: 33 mm – 175 mm.
• Typical applications: Gearbox input/output shafts (most common), conveyor pulleys, fans and blowers, large centrifugal pumps, paper-machine rolls, rolling-mill drive components, agitators, crushing equipment (light shock), electric motors, machine tool spindles.

Why 223 vs. 230: The 223 has slightly smaller OD than the 230 at equivalent bore, making it the default heavy-duty industrial choice across mid-bore ranges; step up to 230 for the largest bore diameters (110 mm and above) where 223 sizing ends.