8483 9089 30

8483908930

Forged steel sprockets with external toothing, whether or not with internal splines in a diametral pitch standard, with: -a diameter of 400 mm or more, but not more than 630 mm, -7 teeth or more, but not more than 15 teeth, -a tooth core hardness of 28 HRC or more, but not more than 45 HRC, -a tooth surface hardness of 50 HRC or more, but not more than 60 HRC, -whether or not, a spline hardness of 30 HRC or more, but not more than 45 HRC, -an effective carburized case depth of 4 mm or more, but not more than 5 mm