180 mm x 225 mm x 10 mm 180 mm x 225 mm x 10 mm skf 81136 M Cylindrical roller thrust bearings

180 mm x 225 mm x 10 mm 180 mm x 225 mm x 10 mm skf 81136 M Cylindrical roller thrust bearings NTN BEARING MANUFACTURING DE MEXICO,S.A.DE C.V. Manufacturers 39400 lbf static load capacity: , 20000 lbf, 34800 lbf dynamic load capacity: Online 180 mm x 225 mm x 10 mm Wholesale Suppliers‎ !

What is 81136 M bearing cross reference？