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Question on putting a round-over on thin wood

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Forum topic by ChuckC posted 09-27-2013 03:06 PM 952 views 0 times favorited 10 replies Add to Favorites Watch
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ChuckC

724 posts in 1690 days


09-27-2013 03:06 PM

Topic tags/keywords: jig question tip

I have to put a round-over on a small oblong shaped piece of wood that will be about 2” tall, 1.5” wide, and 1/4” thick. The round-over has to be on both sides, top and bottom. I have to do this for a lot of them.

I tried to do it on a router table and got a ridge in the middle that I will have to sand out. I would like to avoid getting the ridge if possible.

Thanks!


10 replies so far

View bondogaposis's profile

bondogaposis

2767 posts in 1106 days


#1 posted 09-27-2013 03:17 PM

You have to leave the slightest flat spot in the center for the bearing to ride on or you will get the ridge. It can be almost imperceptible if done right. You have to raise the bit so that the bottom of the bearing rides on the center of the board and no higher. You didn’t mention what size roundover you are using.

-- Bondo Gaposis

View Rob Drown's profile

Rob Drown

729 posts in 2588 days


#2 posted 09-27-2013 03:26 PM

Thanks bondo , I have to do a very similar operation on 18 pcs of western pine in a hexagonal shape. Good tip.

-- The expectations of life depend upon diligence; the mechanic that would perfect his work must first sharpen his tools. Confucius, 经过艰苦的努力的梦想可以成真

View shipwright's profile

shipwright

5320 posts in 1553 days


#3 posted 09-27-2013 03:29 PM

You could do it with a 1/4” beading bit from a bead and cove (canoe bit) set. You would need to jig up for it, maybe use a pattern but it would cut both top and bottom at the same time with no ridge.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

View GOOD LUCK TO ALL's profile

GOOD LUCK TO ALL

418 posts in 482 days


#4 posted 09-27-2013 03:31 PM

Use a fence and the bearing won’t matter.
Cut out a small section, the size of the bit, out of a sacrificial fence then line it up with the edge of the cutter.

View pintodeluxe's profile

pintodeluxe

3580 posts in 1568 days


#5 posted 09-27-2013 03:33 PM

If you have a split fence on your router table, you can open the gap a bit. Then you should be able to use the fence to guide the bit, rather that just the bearing on the bit. This only works with gentle curves, not detailed shapes.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View ChuckC's profile

ChuckC

724 posts in 1690 days


#6 posted 09-27-2013 03:39 PM

Thank you for all of the tips. I would invest the time in making a a jig since I have to do a lot and it may be ongoing.

Shipwright, I like the idea of one pass but I can’t picture a jig in my head since the shape I am cutting is round?

View jap's profile

jap

1240 posts in 809 days


#7 posted 09-27-2013 05:12 PM

how about this to clean up the ridge http://www.leevalley.com/en/wood/page.aspx?p=67392&cat=1,310,41069

-- Joel

View shipwright's profile

shipwright

5320 posts in 1553 days


#8 posted 09-27-2013 06:16 PM

If it is perfectly round something like the third photo here should work. If not something like (maybe not exactly) like the sixth photo. You’ll have to play around with it and you may end up needing to use a template but there will be a way.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

View MrRon's profile

MrRon

2993 posts in 1998 days


#9 posted 09-27-2013 06:53 PM

Use a bullnose bit, MLCS item # 5460, cost $13.00, free shipping.

View gfadvm's profile

gfadvm

11563 posts in 1445 days


#10 posted 09-28-2013 12:59 AM

I ran into the same problem routing my 1/4” Shipwright hinges on the router table. I solved it by using the fence rather than the bearing and routed them standing on edge rather than flat on the table.

Use a jig or push apparatus rather than your fingers to advance them across the bit!

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

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