●For order of hard jaws of scroll chuck [Internal, External & 2 piece jaw (Top and Base jaws)]

・SC series … Bodies of 3, 4, 5, 14 and 16 inches are made of cast iron. JN /JN-T JN-RA series … Bodies of 12 -16 inches are made of steel.

In SC series, Hard jaws are ground with the chuck and it is required the tolerance combination on the jaw fitting. As a general rule, Gripping face is ground concentrically in our shop as repair.

In JN series, the tolerance combination is not required but Gripping face is need to be ground concentrically.

In case of Base jaw for the 2 piece jaw chucks(JN-T/JN-RA), the tolerance combination is also required as well as SC type chucks.

At customer’s strong demand, only parts will be supplied however, problem may occur, I.e. Accuracy is not satisfied because jaws are not ground with the existing chuck body.