Sandvik Coromant Quick Change for CNC Lathes - Manual (Page 12)

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Increased stability
Stability is measured in terms of bending stiffness and torque transmission.
The key features providing the superior stability are:
Face and taper contact
- resisting bending moments and providing positional
accuracy.
Polygon coupling
- the large contact area transmits torque without any loose
parts such as pins or keys. The torque load is spread
symmetrically without peaks irrespective of direction
with the polygon shape self centering for accurate tip
seat center height.
High clamping force
- the segment clamping generates high clamping forces
ensuring a press fit and a two face contact resisting the
bending moment generated during cutting.