Thread: Hole spacing
View Single Post
  #34   Report Post  
Posted to rec.woodworking
Leon[_7_] Leon[_7_] is offline
external usenet poster
 
Posts: 12,155
Default Hole spacing

On 8/20/2011 6:41 PM, Larry Blanchard wrote:
On Sat, 20 Aug 2011 10:46:19 -0700, Paul wrote:

My math skills are non existent beyond basic math, and I'm trying to
figure out how to space holes evenly along a center line in an area.
Let's say I have a rectulanglar block, 6" long ,less 1/4" on each end
for a border and I want to evenly space 6- 3/4" holes. How do you figure
that?


No math required - just arithmetic :-).

If you want a 1/4" border at each end, the center of each of the end
holes has to be 5/8" (1/4" + 3/8") from its end.

That leaves 4 3/4" between those 2 holes. In that space you have to put
4 more holes with 5 spaces between holes. 4 3/4" divided by 5 gives a
spacing of just over 15/16" (4.75 / 5 = 0.95).

Since that doesn't come out even, you need to take the slop (1/16") and
redistribute it to each end. So instead of the centers of the end holes
being 5/8" from the end, they should be 21/32" from the end.

Or you could just ignore the slop and have one space be 1/16" wider than
the others :-).

I hope you're aware that those holes are only going to have 3/16" of wood
between each pair.



Actually a little less, 5/32"