Apparatus and methods for suspending a tool

An apparatus for suspending a tool, the apparatus comprising:

• a support arm having a single mounting location;
• clamps, configured to collectively engage the tool;
• and
• a mounting interface, configured to extend substantially along a work axis of rotation of the tool,
• wherein the mounting interface is a rigid planar element that comprises:
• a first plurality of selectable locations configured to provide direct pivotal adjustable engagement of the single mounting location of the support arm with the mounting interface, and
• a second plurality of selectable locations, spatially fixed relative to the first plurality of selectable locations and configured to provide adjustable engagement of the clamps with the mounting interface,
• wherein,
• when the clamps are engaged with the mounting interface, but not engaged with the tool, each of the clamps is pivotable relative to the mounting interface, and
• when the clamps are engaged with the mounting interface and engaged with the tool, the clamps are not pivotable relative to the mounting interface,
• when the work axis of rotation of the tool lies in a virtual vertical plane and in a virtual horizontal plane, and when the support arm pivotally engages the mounting interface, and when the clamps engage the mounting interface and the tool:
• at least one surface of the mounting interface is parallel to the virtual vertical plane, and
• the virtual horizontal plane does not pass through the mounting interface, and
• when the mounting interface pivots relative to the single mounting location of the support arm, the work axis of rotation of the tool always remains in the virtual vertical plane.