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S Bolton · 10-04-2008, 03:16 PM

I am starting to use and enjoy the Katie jig. I do experience tear out. I use mine on a router table. I need a thin wood or something to use to reduce the tear out.

I thought about 1/4 inch MDF but I wonder if it will dull the bits because of the high glue content.

I don't really want to spend hours cutting down pine into thin peices.

Any ideas?

Steve Bolton

Hamlin · 10-04-2008, 03:20 PM

Hi SB,

For a backer, I don't think a 1/4" piece of MDF is going to hurt the bit. If you are worried about it though, you may to look at some poly instead. I think Rocklers and other places sell small strips.

S Bolton · 10-04-2008, 03:28 PM

The 1/4 mdf may not be a factor as that is what the main backer is made of. Is MDF and 1/4 inch hardboard the same thing?

I also have 1/8 inch hardboard. Would that work?

Thanks

sb

Hamlin · 10-04-2008, 03:37 PM

Quote:

Originally Posted by S Bolton

The 1/4 mdf may not be a factor as that is what the main backer is made of. Is MDF and 1/4 inch hardboard the same thing?

I also have 1/8 inch hardboard. Would that work?

Thanks

sb

Hi SB,

To answer the first question, No, they aren't the same thing.
From what I've read an have been told, hardboard is probably worse on bits than MDF. My work with hardboard is rather limited I'm afraid, so, I can't really say. Sorry.

S Bolton · 10-04-2008, 03:40 PM

Ken,do you have the Katie?

sb

**bobj3** · 10-04-2008, 03:41 PM

Hi SB

Just my 2 cents, pickup some 1/8" MDF and use it,,, put the hardboard in the trash can, man do I hate that stuff.....
It will dull router bits in a heart beat..

Hardboard = cardboard and tons of glue...almost as bad as laminated flooring

=========

Hamlin · 10-04-2008, 03:56 PM

Quote:

Originally Posted by S Bolton

Ken,do you have the Katie?

sb

Hi SB,

Unfortunately, no. Trying to save up for a Leigh jig but, plans are on hold for the moment.

S Bolton · 10-04-2008, 04:14 PM

Bob, where can I get 1/8 inch MDF? I live in the woods. Home Depot is 50 miles away. Would they have it?

Thanks

SB

Bob what do you do for tear out? What you suggested?

**bobj3** · 10-04-2008, 04:24 PM

Hi SB

Well HD/Lowes/some hardware stores,craft stores,ZRockler,many wood working supply outlets, should have it on hand.

===========

Quote:

Originally Posted by S Bolton

Bob, where can I get 1/8 inch MDF? I live in the woods. Home Depot is 50 miles away. Would they have it?

Thanks

SB

Bob what do you do for tear out? What you suggested?

10-04-2008, 03:16 PM	#1
S Bolton Registered User Forum Geek Join Date: Mar 2007 Posts: 493 View S Bolton's Gallery	Report This Post! Katie Jig and tear out I am starting to use and enjoy the Katie jig. I do experience tear out. I use mine on a router table. I need a thin wood or something to use to reduce the tear out. I thought about 1/4 inch MDF but I wonder if it will dull the bits because of the high glue content. I don't really want to spend hours cutting down pine into thin peices. Any ideas? Steve Bolton
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10-04-2008, 03:20 PM	#2
Hamlin Registered User Supreme Forum King Join Date: Dec 2005 Location: Baldwin City, KS First Name: Ken Posts: 1,574 View Hamlin's Gallery	Report This Post! Hi SB, For a backer, I don't think a 1/4" piece of MDF is going to hurt the bit. If you are worried about it though, you may to look at some poly instead. I think Rocklers and other places sell small strips. __________________ Ken "A VETERAN" "Whether active duty, retired, national guard or reserve - is someone who, at one point in their life, wrote a blank check made payable to "The United States of America", for an amount of "up to and including my life". That is HONOR, and there are way too many people in this country who no longer understand it." -Author Unknown
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10-04-2008, 03:28 PM	#3
S Bolton Registered User Forum Geek Join Date: Mar 2007 Posts: 493 View S Bolton's Gallery	Report This Post! The 1/4 mdf may not be a factor as that is what the main backer is made of. Is MDF and 1/4 inch hardboard the same thing? I also have 1/8 inch hardboard. Would that work? Thanks sb
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10-04-2008, 03:40 PM	#5
S Bolton Registered User Forum Geek Join Date: Mar 2007 Posts: 493 View S Bolton's Gallery	Report This Post! Ken,do you have the Katie? sb
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10-04-2008, 03:41 PM	#6
bobj3 Forum Contributer Supreme Forum King Join Date: Jan 2006 Location: Littleton,Colorado U.S.A. Posts: 8,300 View bobj3's Gallery	Report This Post! Hi SB Just my 2 cents, pickup some 1/8" MDF and use it,,, put the hardboard in the trash can, man do I hate that stuff..... It will dull router bits in a heart beat.. Hardboard = cardboard and tons of glue...almost as bad as laminated flooring ========= __________________ PodCast videos RWS on YouTube http://www.routerforums.com/86898-post1.html Besure and click on the Up Arrow key ▲ on the Youtube video, you can select other youtube videos on router tables http://www.woodworkingonline.com/?s=dovetail Machine Cut ▼ http://www.woodworkingonline.com/200...cut-dovetails/ http://www.woodworkingonline.com/woo...podcast-store/ http://www.woodshopdemos.com/menu2.htm Bob J. Last edited by bobj3; 10-04-2008 at 04:03 PM.
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10-04-2008, 04:14 PM	#8
S Bolton Registered User Forum Geek Join Date: Mar 2007 Posts: 493 View S Bolton's Gallery	Report This Post! Bob, where can I get 1/8 inch MDF? I live in the woods. Home Depot is 50 miles away. Would they have it? Thanks SB Bob what do you do for tear out? What you suggested?
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