This type of copier punch unit consists of punches and dies, held by rods which rotate in opposite directions.
The punches and dies have a synchronized rotation with the paper feeding system,
which facilitates the binding holes punching during paper movement.
Punching specification (reference)
Punching holes: Paper thickness: 0.08-0.23 mm (Wood free paper)
Number: 2-3 Weight: 2.5 Kg
Diameter of holes: 8.0 mm Gear: Z=40, m=0.8
Pitches: 108 mm Paper feeding speed: 1,200 mm/sec max.
Punching torque: Expected life time:
Free-load: less than 0.20 N-m 1,000,000 punches
64g/m2 paper: less than 0.59 N-m
110kg paper : less than 0.77 N-m
200g/m2 paper : less than 1.28 N-m
