Quote:
Originally Posted by rilesmitch
...and the distance from the outside edge of the bumper to the pipes.
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make a compass out of a scrap piece
in other words,
1. find the center of the hexagon
2. take a thin (<1/2") piece of scrap ply, board, lexan, whatever, about a foot and a half long.
3. measure a tiny amount under 12 1/2" apart on the scrap, drill the holes with ~1/4" bit.
4. with a pointy thing (awl, something in a multitool, you get the idea), hold the tip through a hole on the center of the hexagon.
5. using a pencil, draw a circle through the other hole you drilled.
6. go to the schools drafting class, geometry guru, or somebody that has 45 and 30/60 triangles. Bum one of each off them. Nicely, of course.
7. try different combinations of the two triangles to achieve a 15 degree angle from the center, from the opposing corners. Continue the line to the corners of the hexagon.
8. continue by using the 30/60 triangle to add 30 degrees to the line FROM THE CENTER, making sure to mark where these 'spokes' intersect the circle.
9. once you have all 12 intersections clearly marked, use a 1 1/4" hole saw or spade bit to drill the holes. (if you can, use the spade bit in the drill press)(you will probably have to file the holes out afterward)
9 1/5. if you want to drill through both hexagons, line up the edges and clamp them together and do them both at once.
10. admire your work.
NOTE: the spade bit can kick like a mofo. be careful and have someone watching/ holding the hexagons with gloves