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router-table-circle-jig You could also put a sacrificial piece of scrap underneath the material instead. Use a router table circle jig to mark the screw mounting holes, the center hole, and trace around the outside diameter. Reply 8 months ago. What I'm trying to sort out is how router table circle jig start the cuttingdo you have to loosen the router height adjustment while it's running and rotate it down to the depth you want and re-tighten? To Router Table Circle Jig Gui solve both problems, I reccomend routing a recess in the base for the router to sit down in.

And there are all sorts of ways to make both. But this jig is easy and foolproof. NOTE: As you finish the hole, the center pivot point will be unsupported which can lead to a ragged finish to your hole.

I realize this page is short on details but it should provide enough information to make your own jig. Detail shot of the pivot. I will try to add better pics of the pivot shortly. The business end of the jig. Making a circle for one my of Thien Cyclone Separator lids. I also slightly beveled the edges on the bottom side with some sandpaper so that they wouldn't catch on anything as they slide around the circle. The first step to using it is setting the post height.

Measure the thickness of the material you'll be cutting a circle in. Adjust the nut on the post so that it sticks out slightly less than the material is thick.

Mark the center of the planned circle, and drill a hole that the threaded rod post will fit in snugly. Set the post at the desired distance from the router bit, and tighten the handle on top to lock it in place. If you are cutting all the way through your material, make sure to hang the portion being cut off the table, and keep rotating the material periodically during the cut to keep from cutting the table. You could also put a sacrificial piece of scrap underneath the material instead.

It's generally safer and easier to cut outer edges of circles in a counter-clockwise direction, and inside edges clockwise. If you don't want a small hole in the cener of whatever you're cutting, you can use a sacrificial piece on top.

Drill a hole in a piece of scrap, and use doublesided tape to secure it to the workpiece with the hole at the center of where you want to cut the circle. Then just increase the depth of cut by the thickness of the sacrificial piece, and cut as usual. Alternatively, if a hole would be acceptable on the underside, but not on top, you can drill the hole only part way through the material, and cut from the bottom.

Have fun, and be safe! I have the same fixed-base Porter Cable router and made a circle-routing jig for it. What I'm trying to sort out is how to start the cuttingdo you have to loosen the router height adjustment while it's running and rotate it down to the depth you want and re-tighten?

I probably should just use my plunge router, I guess! Reply 8 months ago. Reply 2 years ago. Don't ever loosen or attempt to adjust the depth while it's plugged in, let alone running. A plunge router is safer, but it can be done easily without one. Set the depth with the router un-plugged, plug it in, turn it on while holding it securely it will jump a bit when you turn it on , then slowly lower the bit into the workpiece while keeping the side of the baseplate against the fence.

Tip 2 years ago. One very important thing to remember is to take into account the thickness of the cutter bit you are using, and compensate for half of that in your finished circle diameter. This is great! I came up with a really similar jig on my own. Good to see it's a common solution :. Once Router Table Circle Jig Mode you tighten the nut to hold the desired size of the circle, it seems like you will be tightening the fixture to the work piece making it hard to go around.?

Reply 5 years ago. What none of the pictures show is the post that sticks down from the jig under the t-handle. When you tighten the t-handle you are only tightening the post into position.

The post then will drop into the hole you drill in the center of your workpiece and allow the jig to freely rotate deg around it. Nice looking jig. Having a good jig is the secret to most of my successful projects.

I use this circle cutting technique frequently, but I just take a long strip of fiberboard and set it up for a fixed radius. I just posted my Cardboard Ball Chair www.

If I cut a lot of circles of various sizes I'd certainly make a jig like this. The all-thread allowed for very precise adjustments and long radii. I used this to make concentric rounded grooves in an old wood door. The resulting pattern made the door from a very junky piece to something that looked like art.

I love using radius techniques whenever possible. You can do a lot with them. By tashiandmo Follow. More by the author:. I would think that most of not all of these materials could be found in most workshops. The cost to purchase these items would only be a few dollars.

It does of course assume that you have a router to use the jig with. Make a mark on the center line one inch away from the outer edge of the baseplate. My baseplate was round, but many will have a flat edge. Did you make this project? Share it with us! I Made It! MarkG 2 years ago. Reply Upvote. Great job on the jig. LeonardP 5 years ago on Step 8. YumanBeing LeonardP Reply 5 years ago.

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