Otto Bilz [India] Private Ltd offers Self Reversing Tapping Attachment. Otto Bilz [India] Private Ltd manufactures Chucks for Thread Cutting, High Precision Holding Systems for Tapping, Drilling and Reaming, CNC-Precision holding systems. The Self Reversing Tapping Attachment is designed for use on drilling machines which have only manual feed facilities and which do not have a reversible spindle. The tool design is simple, effective, and is virtually maintenance free. The unit is fitted into the machine spindle by virtue of its morse taper shank, with the stop arm located against the column of the drilling machine to ensure effective and positive action. The design of the units is such that it can be used for either right or left handed tapping operations.