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post #1 of 51 (permalink) Old 12-03-2011, 09:28 AM Thread Starter
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Hi all,
I want ot cut a 3-1/2" diameter disk out of 3/4"walnut without leaving a pivot point hole. Do you have any sugestions? I have a router table.

Pauli
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post #2 of 51 (permalink) Old 12-03-2011, 10:14 AM
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Quote:
Originally Posted by pauli mac View Post
Hi all,
I want ot cut a 3-1/2" diameter disk out of 3/4"walnut without leaving a pivot point hole. Do you have any sugestions? I have a router table.

Pauli
This is the way that I generally accomplish this task. To calculate the size of hole in the template: template guide dia. minus bit dia. plus the size of the disc you require.
For example, using a 1" guide and a 1/4" bit, we have: 1" - 1/4" + 3 1/2" = 4 1/4" hole in the template.
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post #3 of 51 (permalink) Old 12-03-2011, 11:00 AM
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Hi Pauli

Just one more way, a hole saw will do the trick easy, just use it without the drill bit in the center of the hole saw..most of the hole saws(the better ones) have a way to replace the drill bit with a new one, just don't put it back in place and use in on the drill press..
http://www.amazon.com/DEWALT-DW1803-...2928936&sr=1-9

One more way that works great also.
Trend Pivot Frame Jig - YouTube

You can order the jig from Amazon or make one easy like I did..

see it in my uploads

Just a note
Yes that's a 40mm guide you see in the snapshot that Harry made for me..

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Last edited by bobj3; 12-05-2011 at 12:58 PM.
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post #4 of 51 (permalink) Old 12-03-2011, 01:06 PM
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Drill a hole in a scrap piece of wood or plastic smaller than the disc size you want. Tape or hot glue the piece of wood or plastic to the piece of wood you need the disc from. Use your router with chosen jig. Cut disc. Separate scrap from disc. Photo of my current jig.
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post #5 of 51 (permalink) Old 12-03-2011, 03:50 PM
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Hi all,
I use this jig : http://www.lescopeaux.asso.fr/Techni...de_Anglais.pdf
This PDF file is in english

Santé

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post #6 of 51 (permalink) Old 12-03-2011, 04:33 PM
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Really nice jig Santé.
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post #7 of 51 (permalink) Old 12-05-2011, 12:32 PM
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One of the options would be to make a template with an equation:
Template diameter=Hole diameter+Guide diameter-Bit diameter
For example:
Diameter of the hole I wan't to make:40mm
My guide diameter:30mm
Bit diameret:8mm
And the diameter of the template is:40+30-8=62mm
Regards
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post #8 of 51 (permalink) Old 12-05-2011, 12:47 PM
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Hi giltic

That's a great way but in the states we can't get a 40mm guide the norm and how did you make the template ...that must be dead on,,

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Quote:
Originally Posted by giltic View Post
One of the options would be to make a template with an equation:
Template diameter=Hole diameter+Guide diameter-Bit diameter
For example:
Diameter of the hole I wan't to make:40mm
My guide diameter:30mm
Bit diameret:8mm
And the diameter of the template is:40+30-8=62mm
Regards



"It's fine to disagree with other members as long as you respect their opinions"

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http://www.youtube.com/channel/UCT-n...RWaEpMA/videos

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post #9 of 51 (permalink) Old 12-06-2011, 01:13 PM
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bobj3;
It was just an example. You can use whatever template and bit you have and calculate the hole with the equation I've wrote.
The template was made with ordinary hole cutting jig - the one you have to drill a hole for centering pin.
Harrysin gave the same example in inches.
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post #10 of 51 (permalink) Old 12-06-2011, 02:03 PM
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Hi giltic


No center pin needed, no hole needed at all or template other than the jig and it will cut the hole out for the jig to run on the inside or out side . cir. cut out from 1/4" in diam to ~, one jig for MANY jobs.
http://www.youtube.com/watch?v=18CUKZo2JUE

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Quote:
Originally Posted by giltic View Post
bobj3;
It was just an example. You can use whatever template and bit you have and calculate the hole with the equation I've wrote.
The template was made with ordinary hole cutting jig - the one you have to drill a hole for centering pin.
Harrysin gave the same example in inches.



"It's fine to disagree with other members as long as you respect their opinions"

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http://www.youtube.com/channel/UCT-n...RWaEpMA/videos

Find all threads started by bobj3
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Last edited by bobj3; 12-06-2011 at 02:59 PM.
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