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post #1 of 7 (permalink) Old 03-15-2012, 08:16 PM Thread Starter
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Default Katie Jig

I have an older katie jig that I am trying to utilze, however when cutting 1/2" material my dove tails are loose. I purchased new backer boards and toaster clamps but still end up with loose joints. My backer boards are aprox. 701 thousands of an inch. Mark Sommerfield utilzes a 5/8 inch and a 3/4 inch backer board. Any Ideas?

Thanks In Advance,
Don
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post #2 of 7 (permalink) Old 03-15-2012, 08:47 PM
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Hi Don

I don't recall having that error you may want to check the bit height it must be dead on ,or it will not fit right, the higher the bit the tighter the fit in this case.
Try setting the bit with 3/4" thick stock not the 1/2" thick stock.
But they do sale the dovetail bit for 3/8" to 1/2" thick stock.see below

5pc Top Bearing Dovetail Router Bit Set For Keller Jig | eBay

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Originally Posted by roberson607 View Post
I have an older katie jig that I am trying to utilze, however when cutting 1/2" material my dove tails are loose. I purchased new backer boards and toaster clamps but still end up with loose joints. My backer boards are aprox. 701 thousands of an inch. Mark Sommerfield utilzes a 5/8 inch and a 3/4 inch backer board. Any Ideas?

Thanks In Advance,
Don



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post #3 of 7 (permalink) Old 03-15-2012, 08:51 PM
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Welcome to the router forum, Don.

James
Sydney, Australia
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I don't mind if other members disagree with my comments.
I don't profess to know everything, and I may learn something new.

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post #4 of 7 (permalink) Old 03-19-2012, 11:21 PM
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I had the same problem and asked charles neil the same question back in 2008 he suggested to remove material from the pin side backer board. I removed material from the pin side backer board and it tighten them up. Remove material lets the material go farther back on the pin increasing the thickness of the pin. try searching Charles Neil 7/16 katie jig using 1/2" material I can't post the link.

Rob




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post #5 of 7 (permalink) Old 03-19-2012, 11:56 PM
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get the DVD and take all the guess work out of it

Dovetails Made Easy-Sommerfeld's Tools For Wood

Just a note on the Katie Sommerfeld sales he has a 5/8" thick backer board in place not the norm of 3/4" thick one but he likes the joints to be real tight,hammer in place type..



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

Marc Sommerfeld Tools ,Videos
http://www.youtube.com/channel/UCT-n...RWaEpMA/videos

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Last edited by bobj3; 03-20-2012 at 12:08 AM.
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post #6 of 7 (permalink) Old 03-23-2012, 10:19 AM
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Here is a response from Marc:
"If your joints are too loose when using the katie jig you should shim the backer board with some playing cards or material like them on the side where you use the pattern bit. You will see by gradually putting more shims in your joint will gradually get tighter and tighter. You don't want to get the joint too tight where you have to pound it together though or you will starve the joint of glue.

Marc Sommerfeld"

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Last edited by Mike; 03-23-2012 at 10:23 AM.
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post #7 of 7 (permalink) Old 03-26-2012, 02:37 AM Thread Starter
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Thanks for all of the help I choose to replace the original backer boards with the 3/4" and 5/8" as Marc had done and that cured my problem.
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