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Question on putting a round-over on thin wood

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Forum topic by ChuckC posted 205 days ago 685 views 0 times favorited 10 replies Add to Favorites Watch
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ChuckC

673 posts in 1437 days


205 days ago

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

2233 posts in 854 days


#1 posted 205 days ago

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

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Rob Drown

704 posts in 2335 days


#2 posted 205 days ago

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

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shipwright

4666 posts in 1300 days


#3 posted 205 days ago

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 230 days


#4 posted 205 days ago

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

3032 posts in 1316 days


#5 posted 205 days ago

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

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ChuckC

673 posts in 1437 days


#6 posted 205 days ago

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

1220 posts in 556 days


#7 posted 205 days ago

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 (online now)

shipwright

4666 posts in 1300 days


#8 posted 205 days ago

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/

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MrRon

2403 posts in 1746 days


#9 posted 205 days ago

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

View gfadvm's profile

gfadvm

9560 posts in 1192 days


#10 posted 204 days ago

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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