Props to Ibanezcollector @ realmofexcursion.com
This tutorial is for how to make a circle jig to draw perfect circles every time.
List of things needed:
-1/2" Speed Bore bit (unless your good with a drill bit)
-1/4" Drill Bit
-1 Drill bit same size as the screw your going to use
First step you need to do is to load up the speed bore bit and start making your cut. DO NOT GO ALL THE WAY THRU THE WOOD. Stop about half way thru. We will come back to this step.
Now since the bore bit will pre drill before it gets to its teeth you should see your center hole. Take the 1/2" drill bit and go all the way thru the wood.
Now load the speed bore bit back up and slowly ream out the wood. Test and fit the sharpie so just the tip is barely showing.
Now you got the sharpie to sit square and flush in the hole we just made. Next step is to decide the circle you want to make in my case my sub needs a 11" cutout. So take 11" and divide by 2. In this example it will be 5.5"
Now we need to measure from the center of our hole to 5.5" on the tape measure. Mark the wood by applying pressure to the screw.
Now drill a hole for the screw to go in. You don't want it so snug that the wood wont turn. The screw is there mainly to hold the wood from sliding around.
Mark your wood so you know what circle diameter that hole is.
Now get your wood and screw in the new circle jig we just made. Apply the sharpie and get spinning.
Viola perfect circle every time. Now since we made the wood long enough this doesn't have to be a one time deal. My old one before my router was used for just about everything from 3" holes to 18" holes.
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