65 mm x 140 mm x 33 mm ISO 1313 self aligning ball bearings

65 mm x 140 mm x 33 mm ISO 1313 self aligning ball bearings with BEARING Driveshaft USA CORP. easy-to-use parts graphics, giving you the ability to check parts availability, ISO Bearing pricing, examine 80 kN Basic static load rating C0 remanufactured options. 65 mm x 140 mm x 33 mm

What is 1313 bearing interchange？