There were some questions awhile back about the pins on the cole jaws not holding very well. So to solve this I thought why not incorporate a donut chuck onto the cole jaws. This thing works great. Start by clamping the bowl in the cole jaws, but it can be a light clamp because it is just to hold the bowl in position and keep it from spinning. Then put the donut on, I used some 2 1/2" bolts that are small enought to go through the cole jaw holes, then wing nuts on the back. I have found that with the 1/4" BB plywood donut I can use 2 - 4 bolts to hold the donut on. Everything is secure and ready to turn without the fear of the bowl flying away. I put the pattern on my web page under Cole Jaw Jigs as a PDF file.
You may also notice the blue pins. This is just short peices if 1/2" air hose over the regular pins. There is a range that the jaws will not fit certain bowl sizes. This makes the pins bigger to fill in that gap, I use the pins with or without the air hose as needed.
You may also notice the blue pins. This is just short peices if 1/2" air hose over the regular pins. There is a range that the jaws will not fit certain bowl sizes. This makes the pins bigger to fill in that gap, I use the pins with or without the air hose as needed.