Full definition
Bearing with cylindrical rollers of very small diameter (length/diameter ratio ≥ 3:1). Minimal radial cross-section: 2–7 mm for high load capacity in confined spaces. Types: with inner/outer rings, cage-and-needle assembly (ringless), drawn cup (thin-walled shell). Shaft diameters: 3–200 mm. ISO 15 standard. Applications: internal combustion engines, transmissions, pumps. Brands: INA (Schaeffler), NSK, NTN, SKF.