Abstract: An apparatus for mounting objects within a panel hole, and method of use, the apparatus comprising a housing having a flanged opening in one end and a plurality of flat coil springs each having a free inner end and an outside edge attached to the housing adjacent to the flange so that upon installation of the housing into the panel hole, the flange engages the exposed surface of the panel and the springs become biased against the hidden panel surface for secure vibration-resistant mounting of the housing within the hole, as well as rapid releasable installation and removal of the housing from panels of any thickness dimension.

Abstract: A variable speed milling machine attachment, and a method for its use, that is efficiently configured for minimal reduction of the spindle-to-table distance of a milling machine, such as the well-known Bridgeport miller, and which when attached to a milling machine having a maximum spindle speed of approximately 5,000 rpm, allows an operator to perform high speed milling, grinding, drilling, and engraving functions at selected sustained spindle speeds greater than 5,000 rpm, up to and including sustained spindle speeds in excess of 20,000 rpm. The attachment also has a visual display that provides an operator with indications of actual spindle speed for precise initial selection of the proper spindle speed for an intended machining task.