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Disposable KerfMaker

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Blog entry by rance posted 1141 days ago 19511 reads 135 times favorited 31 comments Add to Favorites Watch

Well, yes, the Kerf Maker is a very clever jig. I have a different take on its manufacture. I see a reason to have several, NO, Wait… Why not make them DISPOSABLE? :) I had a need to use one today so why not make one. Here it is:

 
I used a stick of about 1/2” square pine. Yeah, Pine(or is that Poplar?). And some double sided tape. Cut the stick in half. (I’m kinda protective of my tape. Can ya tell?)

 
Then stick both halves together with the tape.

 
Trim both ends flush.

 
Now set up to cut a kerf, but only cut through one stick.

 
Somewhere close to one end.

 
Now un-stick the long end and open up that kerf to gauge the piece to work with.

 
And stick it back in place. (Be sure to get a tight fit here)

Looks like I need more practice with this new camera. Better next time. :)

 
Now set up to make the first cut.

 
Flip the jig around and cut the 2nd end of the kerf.

 
Now nibble out the middle.

A perfect fit on the first try. No sneaking up.

 

This one works for me.
- Not much to look at, but very functional.
- I can build (and calibrate) one in 120 seconds from wood in the scrap bin in ANY shop I work in.
- It doesn’t cost a cent.
- It makes great kindling.
- And after you build your fire, it doesn’t take up ANY room in the tool chest.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--



31 comments so far

View nailbanger2's profile

nailbanger2

952 posts in 1745 days


#1 posted 1141 days ago

Maybe you need to practice with the new camera, Rance, but your explanation and step by step instructions are perfect. Thank you, and this one goes in my favorites. The brilliance of simplicity!

-- Wish I were Norm's Nephew

View Chriso's profile

Chriso

8 posts in 2102 days


#2 posted 1141 days ago

The brilliance of simplicity! Too true nailbanger2! Should be in everyone’s favourites.

Thank You.

View David's profile

David

170 posts in 1444 days


#3 posted 1140 days ago

AWESOME I LOVE IT!!!!!!!! This is a must for all woodworkers!!

-- “Don’t tell me what can’t be done, tell me what you want done then shut up and get out of my way and let me do it!”

View EvilNuff's profile

EvilNuff

59 posts in 1229 days


#4 posted 1140 days ago

That’s pretty awesome, thanks for the information!

View degoose's profile

degoose

6976 posts in 1957 days


#5 posted 1140 days ago

Now there is an idea… pity I just bought the Kerfmaster1 from Bridge City Tool Works… and it works just about as good as yours…

-- Drink twice... and don't bother to cut... @ lazylarrywoodworks.com.au For lovers of all things timber...

View rance's profile

rance

4125 posts in 1762 days


#6 posted 1140 days ago

Thank you all for the nice comments. Larry, I’m sure your KM1 at least looks better than this one. :) Just don’t use it for kindling like I do with mine.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View kiefer's profile

kiefer

2959 posts in 1269 days


#7 posted 1140 days ago

Very practical use of scrap material and great idea all around
I will use this next time I need a km .
Thanks for the tutorial ,that was great.

kiefer

-- Kiefer 松

View shipwright's profile (online now)

shipwright

4843 posts in 1400 days


#8 posted 1140 days ago

Hey Rance, That’s very cool.
I’m not a jig kind of guy but if I ever use them they are temporary throw-aways.
Not to criticize anyone who makes / uses these….. I guess I’m thick but I can’t see why you need one at all.
Enlightenment???

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

View rance's profile

rance

4125 posts in 1762 days


#9 posted 1140 days ago

None taken Paul. Its all about Exact Precision and Ease/Speed of the cut. If you are cutting dividers for a jewelry box tray and want the lap joint to fit perfectly, then trying to cut to a pencil line will likely be either a slower process or less accurate than using this or the KM1. With this kind of a jig, it makes the process BOTH Quick as well as Exact, and it does it the first time. It takes into account the exact width of whatever tool you use it with, single blade, or dado, 1/2” router bit, or 3/4”. What process would you go through to cut a lap joint and how tight can you get it without having to sneak up on it?

I found another jig that might be similar. Something that a “Leon” fellow came up with( http://www.homeownershub.com/woodworking/DIY-Lap-Joint-Jig-for-any-size-stock-478165-.htm ). I’d like to see a picture of it, but for the life of me I can’t seem to google one. You can search for “Leon Dado Jig” (without quotes) to find references to it. Most references point back to http://www.iedu.com/DeSoto/Misc/LapJigHowTo.jpg which is no longer valid. Anyone seen Leon’s jig? Inquiring minds want to know.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View shipwright's profile (online now)

shipwright

4843 posts in 1400 days


#10 posted 1140 days ago

I guess the short answer is that I use a sharp pencil, get it really close (maybe right on) the first time and creep once, maybe twice for a perfect fit. If I need to repeat it I’ll either kerf a wider piece and then rip it, use my fence, or clamp a little stop on my miter bar. I guess everyone has their own way.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

View rance's profile

rance

4125 posts in 1762 days


#11 posted 1140 days ago

Hey, if it works for you, gets the job done to your satisfaction, and you are happy with it, then I’d suggest not changing anything. Others might say “If it ain’t broke, then don’t fix it.”. I should have you send me some sharp pencils. :)

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View shipwright's profile (online now)

shipwright

4843 posts in 1400 days


#12 posted 1139 days ago

I’m an old dog Rance, But I just might try one of these. Maybe I’ll learn something. :-)

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

View Joe Lyddon's profile

Joe Lyddon

7622 posts in 2654 days


#13 posted 1139 days ago

Rance:

That is SO SIMPLE, it hurts when I think of the time, etc. spent on preparing to MAKE one the other way!!

You could make one whenever you needed one… mark’em… and hang’em on wall when done, then just grab one that fits & use it…

But, on the other hand, might as well burn’em… you can make one faster than it would take to Find one that fit!! LOL

Of course, the Standard thicknesses could be kept & used if your stock was Prepared to use those thickneses…

A very Clever procedure to accomplish the same end!!

C O N G R A T U L A T I O N S !!

You have a WINNER!

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

View jeepturner's profile

jeepturner

920 posts in 1394 days


#14 posted 1139 days ago

Absolutely brilliant. Kind of what I was thinking but way simpler. I think what you have is an “elegant” solution.
Thanks for the post, I will be using the idea.

-- Mel,

View OldKranky's profile

OldKranky

121 posts in 934 days


#15 posted 927 days ago

Rance,
Thank You!!!! This is so simple I love it!!
I made one yesterday to create some groves in a plywood box for my shop built air filtration system and it worked like a charm.

Thanks again
Jim

-- Better looking at it than for it....

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