The Hang Constantin HAN is a paper drill — sometimes referred to as a book drill or paper boring machine — a specialist finishing machine used in print and bookbinding shops to punch clean, accurate holes through stacked sheets, booklets, and bound documents. Constantin Hang is a German manufacturer with a long-standing reputation for precision paper-drilling and paper-working equipment, and machines of this type are found wherever high-volume hole-punching of printed materials is required.
This four-spindle machine is equipped with automatic stroke on all spindles, allowing it to handle a range of hole-punching tasks in a single pass. Drill diameter is adjustable between 3 mm and 8 mm, giving operators the flexibility to produce holes suited to a variety of binding rings, posts, and fasteners. The hole spacing between spindles is adjustable across a wide range, from 36 mm to 260 mm, accommodating everything from small pocket formats to large A3 and oversized sheets. A stacking height of up to 60 mm means the machine can process substantial piles of material in one cycle, keeping throughput high.
The spindle speed is 1,800 rpm, and the spindle stroke speed — the rate at which the drill head descends and returns — is 21 strokes per minute. Working depth is 120 mm, referring to the maximum vertical travel of the drill head. The backgauge, which positions the sheet relative to the drill centre, is infinitely adjustable between 6 mm and 120 mm and is fitted with a scale for repeatable setups. The distance from the table front edge to the drill centre is 300 mm, defining the maximum reach into the sheet from the operator's side.
The machine operates on a three-phase 400 V, 50 Hz supply, standard for industrial workshop environments across continental Europe. This used example dates from 1995 and is located in Germany.
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