Engineering Processes Class

7 Pages 1862 Words

hat I could face of the stock to the mark I had made earlier.

Juan Briceno Page 2 12/03/2002

The third step was to install the Jacob’s chuck into the live center to be able to drill the hole. After center drilling, I then preceded with a 3/8 inch drill to drill a 2 1/8 inch hole down the center of the barrel and finishing off with the chamfer tool. I then extended the stock so about 5 ½ inches were out of the chuck and changed the position of the tool holder so that the tool bit was perpendicular to the stock. I then locked the live center in place by extending the tailstock quil. I then reduced the diameter as prescribed in the lab manual for all individual sections of the barrel.
At this point, after reducing the barrel to its different diameters, it was off to cutting ridges on the barrel. I change the tool on the tool post, from a round nose bit to a ridge cutter, measured and marked the specific distances, and then preceded the cutting process. I then reinstalled the round-nose tool bit and prepared to make the angle cuts. I then made the 8 degree angle cut from ridge C to D and the 2 degree angle cut from ridge B to C, using the cross slide dial.
To polish the barrel, I took a piece...