3867-85 (3'') Lever Scroll Chuck

Admissible revolutions of the chuck depend on many factors, such as cutting parameters, weight of the workpiece and its balance or type of machining (interrupted or continuous turning). 

The max. speeds as indicated in the table below should not cause a decrease of the clamping force to the half of its initial value. 

When machining in the stable conditions (machining material, tools, working conditions), the clamping force may be reduced by up to 67% of its initial value. 

This relates to the chuck equipped with standard jaws, that do not protrude beyond the outer diameter of the chuck and the unbalance condition of the ‘chuck-machining workpiece’ is maintained (not exceeding 20gmm/kg). 

The chuck and jaws must be in good condition.