A new compensating clutch system allows users of NakamuraCNC turning centers to “float” away misalignment between turret drive motors and toolholders, thus achieving smoother operation, and promoting better surface finishes and longer tool life.

EXSYS Tool Inc.’s new Preci-Flex compensating clutch creates a floating coupling between turret drive motor tangs and toolholders. This arrangement compensates automatically for any misalignment, resulting in high-precision alignment that reduces vibration and tool chatter.

Nakamura machine owners will appreciate a connection that is twice the size of a standard spindle, one that not only provides more surface area for a strong and precise connection but also allows for greater torque transfer and eliminates any loss of power between motors and tool holders. 

By filling the gaps at the top and bottom of drive motor tangs when engaged with the toolholder, the compensating clutch also eliminates wear to turret drive motor connections. Thus, the system provides a complete fit all the way around the drivetrain of the motor, eliminating backlash while delivering much quieter operation when compared to similar systems cutting the same workpiece materials at the same speeds and feeds.

“Whether for simple or complex applications, this new system delivers greater accuracy and much better performance,” said EXSYS Tool’s Scott Leitch. “The compensating clutch ensures precise alignment, which will both improve part surfaces and extend tool life, two absolute necessities in the machine tool business.”