این غلتک مخروطی 31308 is a common metric-sized bearing designed to handle combined radial and axial loads. Below are its key specifications:
Basic Dimensions (ISO Standard)
Designation: 31308 (ISO) / JLM308 (alternate)
Bore Diameter (d): 40 میلی متر
Outer Diameter (D): 90 میلی متر
عرض (T): 25 میلی متر
Cone Width (B): 23 میلی متر
عرض جام (C): 19 میلی متر
Load Ratings (Dynamic/Static)
Dynamic Load Capacity (C): ~108 kN
Static Load Capacity (C₀): ~132 kN
Fatigue Load Limit (Pᵤ): ~14.3 kN
Speed Ratings
Reference Speed (Grease): ~5,300 rpm
محدود کردن سرعت (Oil): ~7,100 rpm
Angle & Components
Contact Angle: ~12°–16° (varies by manufacturer)
Components:
Cone (Inner Ring + Rollers): Typically labeled as 31308D
Cup (Outer Ring): Typically labeled as 31308K
Applications
Automotive wheel hubs
Gearboxes
Heavy machinery axles
Industrial transmissions
Equivalent Part Numbers
ISO: 31308
SKF: 31308
Timken: LM308 (Cone) / L308 (Cup)
FAG/NSK/NTN: Similar designation
Notes
Always verify exact dimensions/loads from manufacturer catalogs (e.g., SKF, Timken).
Proper preload and lubrication are critical for performance.
Would you like additional details on installation or interchangeability?












