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You know, I've cut hundreds of circles for wheels while I was making carts.
I came up with and used at least ten different ways to do the job.
THEN I see this idea.
Blew me AWAY.
Made a circle cutting jig for the router table today! Very simple and very effective. : woodworking
Its so obvious, so elegant, so useful and so intuitive I had to share.
I think I've seen it somewhere before, it does seem great on paper. In practice I've never had any luck doing this to plywood without massive kick back. Must be the router bit, really needs a spiral bit doesn't it?
It does require a bearing on the router bit. I suppose solid carbide bits with end bearings are around; but I've never seen one.Quote:
Originally Posted by Spyro
nah that didn't help me, it kept catching (and I kept pushing of course, because I'm an idiot)Quote:
Originally Posted by markharrison
Here are a couple of versions of solid carbide pattern following bits that I use for particular purposes.
Sounds like you rough cut the circle too large. You shouldn't be getting any kickback. Even a blunt straight-flute bit shouldn't kick back if you're doing it right. It will just make you work harder and burn the wood.Quote:
Originally Posted by Spyro
Related question - what's a good couple of spiral/compression bits to have in the inventory? I don't own any - all my pattern and straight bits are straight cut. What is the "right" bit for cutting dadoes, rabbets and grooves in a router table? I assume an upcut bit, since it will clear waste down towards the router and DE - but I understand that will cause more tearout on the face? I barely use handheld router, too scary.
For dados and similar grooves you'd want a downcut so that you end up with a clean top face of your work. The upcut will cause tearout on the face you're cutting. For a through cut, a compression bit is best (upcut changing to downcut along the length), so tearout on both the top and bottom faces is reduced.Quote:
Originally Posted by lyricnz
Timbecon torquata bits are reasonable - I have a few. Amanatool are great - carbitec now stock them.
I was not in the least impressed by this "methodology".
Two bearing surfaces - the central spindle and the router bearing - on either end of a light batten aligned by hand with 1800+ watts of spinning router blade. It seems inherently unstable, and his circle looks rather rough.
Another accident in progress.
That's the one I made a few years ago! So simple and works so well.Quote:
Originally Posted by Bernmc
Jane