Aluminum casting projects

[acourtjester]

HI
In a past post interest was shown for casting aluminum.
Reil Burner (Oxide00 Project #2)
And a project “The Dividing Head” by David Gingery. Well I built one many years ago and just finished a project that I needed to cut gears for. I developed a foot pedal that could be used on a tig welder or motor speed control. Here is a youtube video showing 2 foot pedal I built the last using the gears.
http://www.youtube.com/watch?v=283PgFZbHAA The small gear is a 16 tooth (.817) diameter and the large one is a segment of a 120 tooth gear. I cut a disk of ¼” aluminum (5.454”) with a center hole of 1.125”. This disk would make a 120 tooth gear but I needed only 20 teeth. The disk was cut into pie shaped pieces welded to a thicker (.750”) 1.125” disk with a 3/8” center hole. This was used to cut the 20 tooth gear section shown in the video.
Attached are pictures of the dividing head that I made.

Have fun
Tom