Full definition
Maximum recommended rotational speed for a bearing based on its type, dimensions, cage material, lubricant and operating temperature. Catalogs list two values: grease lubrication limit (lower) and oil lubrication limit (higher). Example: SKF 6205 with grease: 13,000 RPM; with oil: 16,000 RPM. Exceeding speed limit causes cage overheating, lubricant degradation and bearing failure. Speed factor n路dm = n 脳 (d+D)/2 [mm路RPM]. ISO 15 standard.