The NU315J/C3 cylindrical roller bearing has the following standard dimensions: an inside diameter (bore) of 75 mm, an outside diameter of 160 mm, and a width of 37 mm
Key Specifications:
  • Inside Diameter (d): 75 mm 
  • Outside Diameter (D): 160 mm 
  • Width (B): 37 mm 
  • Internal Clearance (C3): Greater-than-normal internal clearance, designed to accommodate thermal expansion or slight misalignment. 
  • Design (NU): Two integral flanges on the outer ring and no flanges on the inner ring, which allows for axial displacement in both directions.
  • Cage (J): Typically indicates a pressed steel cage, although other premium suffixes like 'ECJ' or 'ECM' denote optimized designs for higher load ratings