Small batch sizes are an everyday fact for Hainbuch, but clamping ranges up to 420 mm are the exception rather than the rule. This is exactly the clamping range that was requested by one customer.
The international transmission and motor manufacturer builds to order and was looking for a precise, user friendly set-up solution requiring no time-consuming adjustment of the various clamping devices.
The company found a solution at Hainbuch. It weighs an impressive 1.3 tons and also has visually imposing dimensions.
A brilliant achievement
The patented CENTREX system in this segmented mandrel, which was developed for China, automatically provides for proper adjustment during changeover, in addition to exact repeatability of the position.
The giant mandrel, which has a segmented bushing equipped with a specially developed rubber compound, can clamp gears with an outer diameter of up to one meter with concentric precision on the Gleason-Pfauter hobbing machine.
In internal tests, the repeatability was even below 0.005 mm. The great challenge was not only the large clamping range, but especially also the coordination of the various processes that Hainbuch was unable to carry out internally.
Peter Gerster, section manager at Hainbuch production, explains “More than 200 production orders, the engineering by our team of experts for the end-stop production and nearly 200 external order items, from raw material to the welding construction and heat treatment – all of that has to be managed”, says Gerster, “and the timing has to be right in the end”. Apparently it was, because a follow-up order is already in sight. This time for a LIebherr LC800.
Hainbuch chucks and mandrel products are distributed throughout Australia and New Zealand by Romheld Australia.