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Forum topic by BrianA posted 12-07-2011 06:09 PM 1645 views 0 times favorited 12 replies Add to Favorites Watch
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BrianA

69 posts in 1746 days


12-07-2011 06:09 PM

I have seen many circle jigs for both he band saw and other tools. My problem is I do not want to drill a center hole in my project in order to cut it in a circle. I thought about double stick tape to tape a block with a hole in it to the work piece but centering the block and avoiding the work piece tilting seems to be an issue.

Any ideas?

Brian A

Milwaukee


12 replies so far

View Bill White's profile

Bill White

3529 posts in 2677 days


#1 posted 12-07-2011 06:18 PM

The jigs I made have a centering screw point sharpened to just “dimple” to backside of the workpiece. No thru-hole is necessary.
Bill

-- bill@magraphics.us

View msparky14's profile

msparky14

24 posts in 1080 days


#2 posted 12-07-2011 07:30 PM

The jig I use is just a small finish nail, that sets into the “Punched dimple” on the back of my projects. Only 1/16” – 1/8” deep.

-- ~ Mike ~

View dannelson's profile

dannelson

149 posts in 1087 days


#3 posted 12-07-2011 10:24 PM

buy my microfence jig advertised in the for trade and swap forum, works great and I can deliver it .Im in Milwaukee every day

-- nelson woodcrafters

View BrianA's profile

BrianA

69 posts in 1746 days


#4 posted 12-07-2011 10:46 PM

CR1

That is getting there. I may try that. I can live with a bit of sanding, just not a hole.

Thanks Now I will have to build a jig.

But still willing to hear more ideas.

Brian

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BrianA

69 posts in 1746 days


#5 posted 12-07-2011 10:49 PM

Cool!

Brian

View Don Johnson's profile

Don Johnson

619 posts in 1497 days


#6 posted 12-07-2011 11:19 PM

Funny thing, I was thinking about this very point when cutting a 6 inch disc on my bandsaw for someone who was making an imitation gold medal – I filled the hole I used for the centre in this case, but was musing on ways to avoid having a hole in the workpiece, but still have it rotating on a flat surface.

The only solution I could come up with was based on double-sticking a thin block with a suitable hole on top of the workpiece, and dropping a pin into the hole from a jig something like this:

I have to say I haven’t tried this yet, so I’m not sure how practical it would be as regards clamping the jig in place on the bandsaw, etc., but at least I can now use LJs to pick holes in the idea without having to go out into the cold workshop to actually make it ! LOL!

-- Don, Somerset UK, http://www.donjohnson24.co.uk

View a1Jim's profile

a1Jim

112482 posts in 2293 days


#7 posted 12-07-2011 11:40 PM

I use the same method as cr unless a hole doesn’t matter like on the bottom of a table top.

-- http://artisticwoodstudio.com Custom furniture

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Sgt374

36 posts in 1311 days


#8 posted 12-08-2011 02:55 PM

What I use is a homemade compass that is offset at the pivot point. If your compass beam is say a 1/2” piece of plywood, attach an additional piece of 1/2” to the top of the beam. This is where your put your dowel for pivot point. Now cut a 1/2” thick disk with hole in it double stick tape in center of work piece and now you can cut a circle with no hole and your compass beam is flat of work surface. Hope this helps

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Sylvain

574 posts in 1216 days


#9 posted 12-08-2011 04:32 PM

Hi everybody

Have a look at this French web site

www.lescopeaux.asso.fr/Techniques/Docs/SanteTripodeAnglais.pdf

This is a clever circle jig for router; it does not use a central pin.

They have other interesting material but usually in French

I just found a method using a pantogrph on

http://woodgears.ca/

-- Sylvain, Brussels, Belgium, Europe - The more I learn, the more there is to learn

View richgreer's profile

richgreer

4524 posts in 1791 days


#10 posted 12-08-2011 05:34 PM

Here’s what I have done – -

Make a circle in a piece of plywood (or MDF) using a conventional jig with a center pin. Attach the resulting plywood template to my stock with double stick tape.

With a bandsaw or jigsaw cut around the template to get rid of waste. I like to cut about 1/8” from the template.

Use a straight bit with a guide bearing on your router to cut your stock to a shape that is virtually identical to the template. I find this easier to manage on a router table but it could be done with a handheld router.

Using the right amount of double stick tape is important. Too little and it might slip. Too much and it will be very hard to get the template off. Recently, on a circle that was 16” in diameter, I found that 4 pieces of double stick tape, each one about 2” x 2” was just right.

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.

View Sylvain's profile

Sylvain

574 posts in 1216 days


#11 posted 12-08-2011 10:44 PM

CR1

the site “les copeaux.asso.fr” is French.

Woodgears.ca is another site which is Canadian.

I don’t know why the French site does not appear as an hyperlink but it is worth looking at it. So copy the address in your browser to visit it.

The Canadian site is run by a kind of jig genius, I must say.

-- Sylvain, Brussels, Belgium, Europe - The more I learn, the more there is to learn

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Sylvain

574 posts in 1216 days


#12 posted 12-09-2011 05:00 PM

Here is the hyperlink

http://www.lescopeaux.asso.fr/Techniques/Docs/Sante_Tripode_Anglais.pdf

The technique of sgt374 (if I have well undersood) is also described here :

http://www.lescopeaux.asso.fr/Techniques/Docs/Sante_Centre_a_coller.pdf

-- Sylvain, Brussels, Belgium, Europe - The more I learn, the more there is to learn

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