Modulhard'andrea High precision modular toolholders. What is MHD'? A modular toolholder system for boring, milling, drilling, tapping. A rigid high precision system, conceived and manufactured with the most advanced design and production facilities, backed by an experience over many decades in boring operations.
On this early and (wonderfully-original) Drummond lathe the Bull Wheel and Drive Pulley are connected together not with a pin, but a substantial nut and stud. The "head" of the stud engages with a slot in the periphery of the pulley wheel (note the notch cut in the pulley to show the operator where the slot is).
This is a reproduction, not a photocopy, of an original Wohlhaupter Universal Boring and Facing Heads Models UPA 1, UPA 2, and UPA 3 Operating Instructions Manual. This manual contains information mounting the head, lubrication, operating instructions. It explains how to turn inside and outside ...
The system . The term MultiBore used by Wohlhaupter stands for a system of modular components which is compatible with every machine spindle. The boring tools have been developed and manufactured to the very highest standards of engineering practice and are also suitable for high-speed machining.