I should make some plywood rings for my duct work 5" snaplock. How do you make them ?
Hole saw ?
Compass and saber saw ( jig saw) ?
Thanks
I should make some plywood rings for my duct work 5" snaplock. How do you make them ?
Hole saw ?
Compass and saber saw ( jig saw) ?
Thanks
Mike — Not sure exactly what the function of the rings is, but I typically use a plunge router and router jig (trammel arm) to make precise circles or rings.
I made a bunch of blast gates, and used a template with a flush trim bit to make the holes. It's easy (but messy) with MDF because you don't have to worry about grain reversal. Plywood should be similar. A spindle sander is handy, too.
Fly cutter on a Drill Press (!) (never with a hand-held drill) if you have one that can cut that large or a router on a trammel or using a pattern to cut the inner circle and free-hand cut the outside with a jig saw or band saw.
If you're using 26 gage or heavier snap-lock, you don't need these, however. If you are using 30 gage HVAC snap lock...yea, you do need them!
--
The most expensive tool is the one you buy "cheaply" and often...
Cnc router now or jasper jig and plunge router before my cnc.
Thanks, a Fly Cutter ?
like this
https://www.amazon.com/Grizzly-H5935.../dp/B0007D2BQG
Last edited by Mike Burke; 02-26-2018 at 6:40 AM.
Your second link is broken but, that is just a typical circle cutter. Used in a drill press with proper work holding they are very trouble free. That being said, if I were going to make a bunch of 5" cutouts I would use a circle jig and a router. Layout and cut all your circles about 1/4" deep in your material, hrough cut these started cuts with a jigsaw, use the router 1/4" edge to guide a template bit at the router table to finish up.
"A hen is only an egg's way of making another egg".
– Samuel Butler
I would not use a fly cutter on a 5" hole in plywood even in a drill press.
I would make template and do it with a router and bushing. Or you could use a circle cutting jig with a router.
5" is pretty big. I did some 4" holes in 1 1/8" particle board with a fly cutter in my mini-mill.
https://www.youtube.com/watch?v=q5OR...ature=youtu.be
NOW you tell me...
Just made 10 of them this afternoon...made a jig to hold my piece of plywood and used my Jasper jig and router. Worked Great !! Thanks for all your help.
There ya go! Yea, a Jasper Jig IMO is the best bang for the buck option. I had one before moving to the Micro Fence system.
If at first you don't succeed, redefine success!
Dave - The jasper jigs are worth the purchase price. I have two of them and use them frequently.
And for what its worth they have told me in the past that they were going to be coming out with a new version that works with Festool routers, but they sure are taking their sweet time about it.
If at first you don't succeed, redefine success!