F704-Spacers - New Trick

Here is something new I learned today. When cutting aluminum tubing, it is difficult to get a perfectly square edge. The method in the Plans worked out great.

First make a mark where the length should be. You can see the dot here.


Chuck the tube up in the drill press and spin a line around the tube with the sharpie.


Make a rough cut with a hack saw leaving some extra space as the cut will never be perfect.



Put the tube back into the drill press and spin it on some sand paper until down exactly to the line.



And there are two perfect spacers  1  and 28/64 (or 1 and 7/16)