Bridgeport Mill Grinding Attachment

US $360.00

  • Waukesha, Wisconsin, United States
  • Feb 13th
The Bridgeport Mill Grinding Attachment is an auxiliary grinder spindle driven by a flat belt. It comes equipped with a quill mounting ring that has an eccentric bushing to adjust the belt tension. Vertical movement of the grinder spindle is possible for belt alignment. In the mill spindle, the drive pulley is mounted on a 1-1/4" arbor X R8 tool driver, which is included in the package. Note that the R8 pulley mount with a quill clamp requires a longer tool drawbar, typical of other quill attachments. The mounting ring's inside diameter is 3-3/8 inches. Included in the unit are two different length 3/8 inch stone arbors and a collet chuck for 1/8 inch integral shaft stones. The package also comes with two drive belts and a few stones, all packaged in a plastic toolbox. The grinding wheel spins at about 8800 rpm with a speed increase of 3.25:1 ratio, given the old Bridgeport top spindle speed of 2720 rpm. This unit can be used for grinding a straight edge, a flat surface with a cup stone, or for dressing a round feature if the part is mounted on a rotary table.

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