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Forum topic by Odiferous posted 03-05-2013 04:44 AM 886 views 0 times favorited 5 replies Add to Favorites Watch
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105 posts in 2218 days

03-05-2013 04:44 AM

I’m pretty sure that what I know isn’t a tenth of what can be done with a router, so I’m asking the voice of experience: how does one cut an interior roundover? Like the inside curve on this button (but larger). I have a Big Box of Bargain Basement Bits with several sizes of roundover, but they all have bearings that would be in the way, and I haven’t seen any for sale without the bearing. I tried taking the bearing off of one of my bits, but there’s still enough of a post to cause an issue.

I keep thinking I just don’t have the right bit, but am I missing some “use the left third of a keyhole bit” kind of trick that makes this possible? My next best option is to do the roundovers on a donut, rout a rabbet on the back side and drop a disc in—but it just seems like it ought to be easy to carve from a solid piece.

5 replies so far

View runswithscissors's profile


2767 posts in 2052 days

#1 posted 03-05-2013 04:54 AM

The only other option I can think of is to make a template (could be outside or possibly inside your donut), and use a bushing. Otheriwise, your other idea, rout the donut first, then drop in a disk from the back, seems best. Maybe somebody else can come up with something truly ingenious.

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

View josephf's profile


200 posts in 2123 days

#2 posted 03-05-2013 05:15 AM

View bondogaposis's profile (online now)


4768 posts in 2378 days

#3 posted 03-05-2013 05:23 AM

Yeah, a flat bottom roundover is the one.

-- Bondo Gaposis

View Odiferous's profile


105 posts in 2218 days

#4 posted 03-05-2013 11:29 PM

Thanks guys—that’s what I was looking for. Though it seems like the length of the shoulder might limit its versatility. It looks like the point cutting one would work as well, since I was already expecting to hog out the interior with a straight bit.

Anyway, now that I know what it’s called, I’m seeing them all over the place. I need a wall poster reference chart!

View Shawn Masterson's profile

Shawn Masterson

1325 posts in 1975 days

#5 posted 03-06-2013 12:19 AM

you might be onto something with the poster. wood shop reference posters I like it

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