Hi Kevin

The Jasper you have will do the job just fine you just need to rework the Jssper just a little bit, that's to say drill out the 1/4" hole to a 3/4" or 1" hole in the Jasper and use a brass guide in your router base..no need to bolt the Jasper to your router base..

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Thank you for the reply. so what you're saying is to drill out the calibration disc to a bigger size(3/4") and use a brass guide? is there anywhere that can show me how to use guides? Im pretty new at routing so im having a hard time picturing how this is all set up

 

I use this one:

Precision Circle Jig - Lee Valley Tools

 

I use this one:

Precision Circle Jig - Lee Valley Tools

I believe this is the Jasper 400. same as mine.

James

 

Lee Valley sells Forstner bits of the size of the circles you want.

 

Hi Kevin:

Ok, you've got a bunch of options here. Firstly, the trammel method is a bit difficult to handle on small sizes. This is the normal centering jigs that you see. If you chose to go this route, make sure you can walk entirely around your table and keep your hands on the router while cutting the hole. You might pull it off with practice, care and patience.

However, your ideal is Santé's circle cutting jig.

http://www.lescopeaux.asso.fr/Techniques/clic.php3?url=Docs/Sante_Tripode_Anglais.pdf

Also, equally successful is the pivot frame.

 

Hi Kevin,

The Jasper 400 circle jig will cut holes from 1" to 7" in 1/16"increments.
(this is the round jig, not the oblong jig((200?)))

I have cut 4" holes with a Makita 3612C router with no problems.

I believe it should handle your Craftsman.

James

 

A relatively easy to make circle jig like this one goes steplessly from about a 3/4" hole all the way up to over 20". The spacing, diameter and height of the rods are determined by the particular router.

 

Harry,

I made your jig to suit my Ryobi router, but did not secure the rods properly.

I am going to modify to take 1/2" threaded rod for the makita.

I have not set the formica yet. What glue did you use?

James

 

James....I was lucky and didnt have to use the jarrah block, I just drilled two holes, countersunk them and used thin spacers so the rods ran parrallel to Harrys board....I' ll take a photo when it thaws out here and post it.....Regards....AL

 

Heres the phots of my jig for circle cutting James....note the thin packing piece between the board and the jig....if you dont use the strip the rods tend to point down and you cant get the router base to slide on the rods. Regards......AL

 

Hi Kevin,

Sorry for hijacking you thread, but you can see there are a number of ways to solve your problem. All of them should work with your craftsman router.

have you found the answer you were after?

James

 

harry, I will post pictures this week end as I cannot access the shed during the week. (dark when I get home from work).....

Thanks also Al.

James

 

Go the Aussies for using necessity as the mother for invention...I'm gonna make me one of those circle cutters just for fun.

 

Bill, you may have trouble adapting that circle cutter to a Ryobi router unless you have the Ryobi fence.....if you do....go for it, the principal will be the same. Regards......AL

 

AL,

You do not need the fence if you use a hardwood block as Harry did.

I used a wooden block and I need to secure the rods in a better manner. I will take a clue from Harry and file a groove and glue in.

James

 

Thinking back James, I now recall that I ground a deep "V" groove.