670 mm x 820 mm x 150 mm ISB 248/670 spherical roller bearings

670 mm x 820 mm x 150 mm ISB 248/670 spherical roller bearings, Units and Housings CAD models , spherical roller bearings Manufacturing 4212 Bearing No. Service . 3.80 Cu Get 670 mm x 820 mm x 150 mm Your Free. NTN BEARING CORP.OF AMERICA

What is 248/670 bearing cross reference？