On the crank (sheet 8) there is a .5" diameter pin. If this pin is positioned to give a 2" vertical stroke, then the distance from the outside of the pin to the center of the crank is 1.25". The out side of the pin will 'scribe' a 2.5" diameter circle.
The yoke (sheet 9) shows an area "Mill out this area" 2.125" x .5" the length needs to be increased to at least 2.5" to accommodate when the pin is at 3'o clock and 9'o clock.
Also I have a question on the Yoke Shafts (sheet 10) there is a long and short shaft, on each there is a .125" diameter thru hole - What are these holes for?
DaveH
03-12-2015, 01:32 PM (This post was last modified: 03-12-2015, 01:36 PM by Bill Gruby.)
(03-12-2015, 01:03 PM)DaveH Wrote: On the crank (sheet 8) there is a .5" diameter pin. If this pin is positioned to give a 2" vertical stroke, then the distance from the outside of the pin to the center of the crank is 1.25". The out side of the pin will 'scribe' a 2.5" diameter circle.
The yoke (sheet 9) shows an area "Mill out this area" 2.125" x .5" the length needs to be increased to at least 2.5" to accommodate when the pin is at 3'o clock and 9'o clock.
DaveH
Correct again Dave. Ed, move the Drive Pin to be centered on a 1.5 inch diameter. This will solve that problem. Nice catch Dave. This is why I like to build it then do the prints.
03-12-2015, 05:00 PM (This post was last modified: 03-12-2015, 05:06 PM by Bill Gruby.)
Dave;
This should show how the Trunnions and Rails go together. I have completed these now as they are mounted to the Side Rails. That piece of Aluminum behind them came today, ten days early.
I'm way behind you guys and probably won't be able to get to the corrections to the drawings until this coming weekend. I did change the .170" holes to .257" so I have accomplished something.
We were talking on another Forum about Match Drilling mating parts. One gent came along and said he had no Mill so match drilling was not an easy task. Wrong -- I showed him how. I Match Drilled the sides to the back in my 25 year old Drill Press. Just took a little ingenuity and time. Drilled and tapped all ten holes in less than an hour.
