QUILL FEED FOR A PORTABLE DRILL ADAPTED TO BE MOUNTED TO A WORK SURFACE

摘要

A magnetic based drill assembly (10) comprising a support platform (12) mounted to the magnetic base (14) for attachment to a work piece includes a feed mechanism (26) operatively connected to the platform (12) for rectilinear movement between a fully retracted position and a fully extended position. The feed mechanism (26) includes a splined collar (28) slidably mounted to the splined arbor (24) for movement relative to the splined arbor (24) and for rotatably supporting a drill tool (68). The motor (22) is mounted in a stationary position offset and substantially parallel to the feed mechanism (26) to reduce overall height and weight of the drill assembly (10). As the splined arbor (24) is located within a cylindrical feed arbor (28), a liquid coolant can be directly injected on the drill tool (68) and workpiece during operation of the drill assembly (10).