Geometric-design chuck accepts both bar or billet

Spanntop Nova chucks from Hainbuch includes the Combi pull-back, Combi dead-length and Modular versions. An improved geometric design can accept both bar fed stock or billet workpieces. Spanntop Nova chucks feature a standardised chuck body so the same components can be used in the pull-back and dead-length variants. The easy-to-change Spanntop adapter Mando Adapt can be used with both the Modular chuck and the Combi pull-back variant, and the Jaw Adapt can be used with the Combi pull-back chuck. Due to the increased distance between the front face of the chuck and the end-stop, longer workpieces can be clamped more rigidly. The longer clamping length also reduces the protruding length, producing optimum conditions for accurate machining. Previously, extended guides cause a slip-stick effect. Hainbuch has overcome this problem with high precision extended guides that prevent ‘wobbling’ to ensure that the component moves smoothly and achieves a concentric precision of better than 1 micron. Offering operational speeds up to 8,000 rpm, the fine balancing of the Nova chuck range contributes to both component accuracy and spindle bearing longevity. Balancing can be achieved in two planes without disassembling the chuck. As well as the usual balancing points on the front face of the chuck, the threaded holes in the spindle flange serve as a fixture for balance weights.