Otto Bilz [India] Private Ltd manufactures Close Centre Tapping Chucks. Otto Bilz [India] Private Ltd manufactures Chucks for Thread Cutting, High Precision Holding Systems for Tapping, Drilling and Reaming, CNC-Precision holding systems. The Close Centre Tapping Chucks are designed with a slim external profile for use on multi-spindle heads where spindle centre distance is limited. The units are designed to allow the tap to be located directly into the chuck, the tap being retained by a quick locking mechanism similar to that used on Bilz tap adaptors.