. Metal spinning . Fig. 27. Various Forms of Spinning Chucks made from Hard Maple. Fig. 28. A Group of Bronze Sectional Chucks the open edge is also trimmed even and the shell is polished withemery cloth. A large bronze chuck of seven sections, one of which is a key sec-tion, is shown at A. The largest diameter of this chuck is 10 has a cast iron center hub and a steel cap at the top for holdingthe sections in place. This cap, when in place in the retaining groove TOOLS AND METHODS 25 shown, is flush with the top of the chuck. Another large chuck hav-ing five sections and one key sec
. Metal spinning . Fig. 27. Various Forms of Spinning Chucks made from Hard Maple. Fig. 28. A Group of Bronze Sectional Chucks the open edge is also trimmed even and the shell is polished withemery cloth. A large bronze chuck of seven sections, one of which is a key sec-tion, is shown at A. The largest diameter of this chuck is 10 has a cast iron center hub and a steel cap at the top for holdingthe sections in place. This cap, when in place in the retaining groove TOOLS AND METHODS 25 shown, is flush with the top of the chuck. Another large chuck hav-ing five sections and one key section is shown at B. The retainingcap in this case is of a different form. The lower parts of the sectionsof all these chucks fit in a groove at the bottom of the hub. A chuckof five sections that is without a binding cap, is shown at C. Thisis not a good design as the hub or center is too straight, and all ofthe grip or drive is from the bottom groove, which is not shape shown at D is more difficult to spin than any of the others,as it is smaller at the opening i
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Keywords: ., bookcentury1900, bookdecade1910, bookidmetalspinnin, bookyear1912
