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router groove with rounded corners

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Forum topic by woodflower posted 08-04-2011 04:16 AM 2732 views 0 times favorited 9 replies Add to Favorites Watch
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woodflower

20 posts in 2345 days


08-04-2011 04:16 AM

Topic tags/keywords: router guide groove question

Help. Finally got the template and the inside carving done on my carving boards, but I can’t figure out how to make the groove around the edge. Tried with the sears guide but it isn’t steady around the corners with the bracket assembly. I used that before on a sloped headboard, but it’s not working here. I could just make straight lines and square them off, but It’d be nicer going around the curves.

-- Time is the coin of your life. It is the only coin you have; be careful lest you let other people spend it for you. - Carl Sandburg


9 replies so far

View CharlieM1958's profile

CharlieM1958

16241 posts in 3680 days


#1 posted 08-04-2011 05:01 AM

If I understand correctly what you are trying to do, you just need a cove bit with a guide bearing.

-- Charlie M. "Woodworking - patience = firewood"

View Mike's profile

Mike

406 posts in 2149 days


#2 posted 08-04-2011 06:31 AM

Are you trying to make a run off trap that goes just inside the edge of the board that is to prevent liquids from running onto the counter?

-- look Ma! I still got all eleven of my fingers! - http://www.lepelstatcrafts.etsy.com - https://www.youtube.com/channel/UCppWfrYGXCr5lm9uW-Fpqqw

View childress's profile

childress

841 posts in 3004 days


#3 posted 08-04-2011 08:59 AM

Make a simple mdf template and then use a bit like this

you can either get a bearing for the shaft and follow the template or use those bushings I see in your photos

use double sided tape to stick the template to the board….

-- Childress Woodworks

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woodflower

20 posts in 2345 days


#4 posted 08-04-2011 05:03 PM

Mike stated it correctly. I have a nice box bit, like a cove but with a straight bottom…that’s what I used on the other grooves. But yes, I am trying to make a runoff groove that connects to the tips of the tree , goes around the edge about 2” in, and ends up in the well at the root end of the tree in that basin, which is the deepest. I can make straight lines around the edge 2” in, but the corners mess me up. It may be a matter of holding the guide bushing more steady, but I guess I’m not strong enough to keep it exactly at the same angle so I get a wavy corner instead of a rounded one. I could cut a template for it, but I didn’t need to do that on the groove on my headboard (elsewhere on this site) that is also 2” in. I don’t remember how I did that, I think it was with this guide bushing….ah, too much time between projects, like 15 years. oy.
Thanks for your help!!!!!!!!!!

-- Time is the coin of your life. It is the only coin you have; be careful lest you let other people spend it for you. - Carl Sandburg

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woodflower

20 posts in 2345 days


#5 posted 08-07-2011 05:11 PM

Is a template the only way to make the corners on the surface border groove?

-- Time is the coin of your life. It is the only coin you have; be careful lest you let other people spend it for you. - Carl Sandburg

View Dusty56's profile

Dusty56

11806 posts in 3150 days


#6 posted 08-07-2011 05:40 PM

I would say that if you want it to come out perfectly , then make yourself a template as described above.
I use an edge guide on my boards , but again , those are straight lines with 90* corners.
I suppose if you had a small router or laminate trimmer , you could make a custom base with something like a ball bearing used to follow the curve on the outside of your board…..just a thought : )

-- I'm absolutely positive that I couldn't be more uncertain!

View BertFlores58's profile

BertFlores58

1684 posts in 2384 days


#7 posted 08-07-2011 06:30 PM

There is no perfect round corner border that can be cut by router unless you do first the round and findout were the center is to all four corners. You can use the circular attachment for the router or you can make your own. When the quarter rounds edges and border are done then you can start on the straight side.

-- Bert

View woodbilder's profile

woodbilder

9 posts in 1986 days


#8 posted 08-08-2011 12:55 AM

Check Whiteside or Amana for the appropriate router bit, and consider disposing of the Sears Crapsman baseplate and jig.

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woodflower

20 posts in 2345 days


#9 posted 08-08-2011 02:00 AM

ok, the custom base and ball bearing which I have, is for the next project. I’m going with the straight edges like Dusty’s boards. Seems to work just fine. Keeping it simple. And yeah, gotta get a new edge guide. The sears one is warped and doesn’t hold true…It’s pretty old. Worked fine in the past. I’m using a Craftsman plunge/fixed base exchangeable router but I also have an older smaller one, my first one. I’ll use a rotary tool to help smooth out grooves that get progressively deeper to the well at the bottom. I used Amana for the headboard…nice one, well worth the bucks – if you have the bucks that is.Thank you all for your help. I’ll send in a finished pic soon….there’s hope – 30 years later….lol.

-- Time is the coin of your life. It is the only coin you have; be careful lest you let other people spend it for you. - Carl Sandburg

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