Abstract: A workholding system comprising dissimilar support members, each adapted to interchangeably operably support at least one vise-like clamping assembly in a plurality of workholding orientations relative to a support member. One support member arrangement can non-movably support a plurality of vise-like clamping assemblies relative to the support member. Another support member can indexably support a plurality of vise-like clamping assemblies such that they can be selectively indexed about a common axis.

Abstract: An adaptor member for mounting a column that operably supports at least two vise-like clamping assemblies in a predetermined orientation on a support surface of a milling table. The vise-like clamping assemblies include movable support members that protrude from a corresponding surface of the column and have removable jaw members attached thereto. The adaptor member is equipped with cavities adapted to receive therein the movable support members of a clamping assembly to enable the column to be supported on the adaptor member. Locating members are provided to locate a surface of the column member relative to the adaptor member in a predetermined confronting orientation. The column member is removably attached to the adaptor member using pins that are also used to removably attach the jaw members to their corresponding movable support members.