Thru Tennons - Router Forums
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post #1 of 16 (permalink) Old 03-03-2019, 12:55 PM Thread Starter
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Default Thru Tennons

Doing a project that requires rounded thru tennons that will be shown, Mortise is no problem as just a simple 3/8 bit, but the tennons are becoming a pain.. yes I know I can hand round them by hand but I would much rather use a jig so I can get the same results every time. Any one done something similar??
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post #2 of 16 (permalink) Old 03-03-2019, 01:14 PM
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Doing a project that requires rounded thru tennons that will be shown, Mortise is no problem as just a simple 3/8 bit, but the tennons are becoming a pain.. yes I know I can hand round them by hand but I would much rather use a jig so I can get the same results every time. Any one done something similar??
G Vavra
A 3/8" wide tenon is pretty small to use a bearing guided bit to round over. I would use my Dremel set up as a router. W/a 1/16" round over bit that has a brass pilot bearing.
Or you could cut the rail tenons short and make some plugs to fill the hole and let extend proud of the legs. I have done this by taking a short 1X6 and cutting a tenon across the end and rounding over the edges and cutting the tenon into plugs to cap the rails, this makes them all end grain and the same look to the grain.
Just a suggestion,
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post #3 of 16 (permalink) Old 03-03-2019, 01:57 PM Thread Starter
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I should have been more clear.. rounding the tennon shoulder..
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post #4 of 16 (permalink) Old 03-03-2019, 02:04 PM
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Use loose tenons cut all the way through.
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post #5 of 16 (permalink) Old 03-03-2019, 02:33 PM Thread Starter
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Do not want loose tennons.. Its a chair that is held together with the thru tennons and I want the grains to match..
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post #6 of 16 (permalink) Old 03-03-2019, 02:37 PM
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Originally Posted by kimosawboy View Post
Doing a project that requires rounded thru tennons that will be shown, Mortise is no problem as just a simple 3/8 bit, but the tenons are becoming a pain.. yes I know I can hand round them by hand but I would much rather use a jig so I can get the same results every time. Any one done something similar??
G Vavra
are you doing a tusk tenon...

I use a Leigh jig for rounded tenon edges... there are others...
plan ''B'' would be to make the tenons floating since the mortises are no issue...
round over, half round or bull nose a length of flat stock and use the length you need...

.
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This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
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post #7 of 16 (permalink) Old 03-03-2019, 02:49 PM
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Round over the part that will show with a router and round over bit. Finish the base of the tenons with a chisel good enough so they fit the mortise.
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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 #8 of 16 (permalink) Old 03-03-2019, 03:06 PM Thread Starter
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Stick486..Not a tusk tennon and a Leigh is exactly what I would like to mimick without the 700-800 Cost.
Cherryville Chuck, Just the shoulders need to be rounded..
Here is the joinery that I'm working on...
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post #9 of 16 (permalink) Old 03-03-2019, 03:21 PM
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Cherryville has the plan...

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”
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post #10 of 16 (permalink) Old 03-03-2019, 03:44 PM Thread Starter
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I'm not worried about the part that will show . What I'm looking for is repeat ability of rounding the shoulder, using a chisel for a good enough fit will not do.
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