concave groove on router table? - Router Forums
 
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post #1 of 6 (permalink) Old 04-27-2014, 07:37 PM Thread Starter
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Default concave groove on router table?

Greetings!
I'm making the porch swing featured in Woodsmith 98. It requires a groove
in the concave edge of a curved rail. Article says make the groove with a hand held
router but that looks like lots of chances for errors.
Can a slot or groove be cut on the concave edge of a curved rail safely at the
router table? I realize of course a fence couldn't be used.
tia
Tom
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post #2 of 6 (permalink) Old 04-27-2014, 10:04 PM
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A slot or groove may be cut on the router table using a bearing guided slot cutter.

How wide/deep is the required groove.

You may have to make a number of passes, depending on the size of your slot cutter.

James
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post #3 of 6 (permalink) Old 04-27-2014, 11:21 PM
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You need to check your plans there where errors in the plans.
April 1995
Issue 98

Porch Swing
Page 12: Figure 19
Arm rest left end height measurement printed as 2" but should be 2 1/4".
Page 13: Supplies list
Two errors: (1) List indicates that 55 #8 x 1 1/2" Fh Bronze Woodscrews needed; it should be 35. (2) List indicates that 17 #8 x 2" Fh Bronze Woodscrews needed but it should be 37.
Page 12: Figure 19
The armrest measurement from the end of the curve shown as 8" is, in reality 7". The full measurement (21") given elsewhere is correct.

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post #4 of 6 (permalink) Old 04-27-2014, 11:43 PM
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I agree with James about the slot cutter. Whiteside shows the deepest cut as 5/8". You can make the width anything you want by raising or lowering the bit and by flipping your piece over. Whiteside Machine Company

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #5 of 6 (permalink) Old 04-28-2014, 01:42 AM
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I have just had a look at that article and routing the groove as per Fig 10 should be no problem at all.

IMO, the cut upper back rail is 2 3/4" wide which will give adequate support for most mid size routers if you take your time and don't tip the router.

The slot only has to be 1/2 deep.

The bottom rail is 5 3/4".

You do not say what router you have.

If you use a table, the work should be even more secure.

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Last edited by jw2170; 04-28-2014 at 01:45 AM.
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post #6 of 6 (permalink) Old 04-28-2014, 07:55 AM Thread Starter
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hello!
Thanks for the fast replies, some of you have looked up the article. I use a
Dewalt 618 in the table and a Dewalt 621 hand held. My concern using the
hand held option was the 23/4 width of the work piece and the fact that's
it's curved would mean multiple relocations on the work bench to make
the full length groove. To complicate the set up, my slot cutter bit is long
enough that the work piece would need to be raised over the bench.
I don't recall having to use the table without a fence, so that's a little
intimidating. Will make some practice cuts both ways.
thanks

Tom
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