Six jaw dual scroll chuck.
Inner scroll tight on register, for concentricity, working three jaws
Outer scroll with small floating capability, controlling other three jaws for grip.
Outer scroll could be link to inner allowing a few degrees of independent motion, making adjustment from one pinion possible, tightening using another pinion.
Inner scroll tight on register, for concentricity, working three jaws
Outer scroll with small floating capability, controlling other three jaws for grip.
Outer scroll could be link to inner allowing a few degrees of independent motion, making adjustment from one pinion possible, tightening using another pinion.