The Specialty Series covers Timken spherical roller bearings that fall outside the standard 213/222/223/230/231/232/233/239/240/241 family — including extended-bore variants using slash notation (e.g. 230/500, 239/600) for bores exceeding standard-series maxima, plus off-standard series 262, 263, 238, 248, and letter-prefixed specialty numbers (SLJ, SLK, B-9, U-4, S-, J-, M-, N-, 130SCB). These are purpose-engineered for specific OEM applications — large wind-turbine main shafts, ship propulsion systems, custom continuous-casting rolls, mill stand backup rolls exceeding 500 mm bore, and niche high-load service.

• Construction: All variants are double-row self-aligning spherical roller bearings — section and cage geometry vary by part number.
• Cage options: Brass machined finger is dominant on the large specialty variants (“YMB”, “EMB” suffixes); some smaller specialty parts use steel stamped window cages.
• Bore types: Both cylindrical (straight) and tapered (“K” suffix) bore variants are represented.
• Feature packs: W33, W507, W509, W906A and a range of OEM-specific lubrication / sealing feature packs appear in this series.
• Clearance classes: C08, C2, C3, C4 — specialty clearance codes appear on large variants.
• Bore range: 45 mm – 1,250 mm (1.77 in – 49.21 in) — the largest bores in the Timken metric spherical roller lineup.
• OD range: 85 mm – 1,630 mm.
• Typical applications: Wind-turbine main shafts, ship propulsion thrust bearings, large continuous-casting and mill-stand backup rolls, heavy-duty marine gearboxes, specialty OEM-engineered equipment.

Shopping tip: Specialty bearings often have long manufacturing lead times and limited stock. If you need a specific part number, contact Lambear Industries directly for availability, lead time, and pricing — our team can cross-reference to alternatives when needed.