Application
For mill arbors, blade head holders and cutters with lateral grooves.

Execution
Consisting of a stud bolt with hexagon socket (operated using a hexagonal T-handle wrench and screwed-on threaded ring)

Notes
A huge clamping force is generated due to the different pitches of the two threads on the stud bolt. During the clamping phase, the threaded ring pushes against the face of the cutter and no longer rotates with the stud bolt. Prevents damage to the cutter and improves concentricity and axial runout accuracy.