360 degree indexing wheel for degree marking

thingiverse

Human: 360 degree indexing wheel for marking a scale on a work piece. I created this device to fit on the spindle of my 9 inch Hercus lathe (equivalent to South bend, Sheraton or Boxford models) with a 1 1/4 inch diameter spindle. Two rows of holes are spaced at 10 degree increments, offset by 5 degrees from one another. Use one row of holes for marking the 10 degree marks and the second row for marking the 5 degree marks. The teeth on the periphery are grouped in fours, representing one degree increments each. If you examine my photos, I mounted a work piece in the lathe using a 60 degree threading tool, positioned sideways as the tool to make the markings. To index the wheel, I attached a block with a hole through it that I could move to align with the rows of holes or the peripheral teeth without altering its height. My indexing pin was tapered on one end for snug engagement in the holes and featured a flat chisel edge on the opposite end for centering the teeth. This ensured all indexing positions were at the same height, along the same line.