Guys, my first post here, so please go easy...
I came across this forum when googling 'routing small circles'. I have zero routing experience, but do have a small old Sears router. I also have a need to make something like this:
Basically, a donut with 8" outside diameter, about 6.5" inside diameter, and 30 radial grooves. I'd like to make it out of HDPE. The thickness is about 3/4", but since the sheet I have is only 1/2" thick I'm thinking of cutting the inner circle all the way through then making a disk with the same 8" OD out of lexan and bolting the two together.
Here are my questions:
1. Do I cut the outer circle first then the inner? How does the center pin stay put while I'm cutting the inner circle? Will using a thick MDF base help that pin stay centered?
2. What kind of jig could I make to help me cut radial grooves? Should I cut the grooves first, before doing the circles?
3. Anything to watch out for?
P.S. If anyone is curious, the wheel is from a bullet feeder used for reloading.