Yet Another Kerfmaker

OK. OK. Enough!!! I will make one this weekend. Just quit posting them!!!! AAAAAHHHHHH!

Nah, great work, Greg. Yes, I’ll have to have one since all the other folks have one.

I think I will make mine to use with a stacked dado. I will just have to add an adjustment screw that will extend to say 1/4 inch or 3/8 inch.

What do you all think?

-- Makin' Sawdust!!!

Greg, you are right this is a pretty versatile jig and certainly is not a complicated build at all.

Nice job.

-- With God's help all things are possible- even woodworking. Woodworking is not just a hobby, it is an (expletive deleted) expensive hobby.

well done another great Kerfmaker

-- Jim from Heirloom Woodshop Southern Oregon

I missed something. What are these things for?

-- Gary, South Central Wisconsin. So much to learn, so little time!

i am a new woodworker and the build confuses me even though it is simple. looks like a great tool. any chance of getting a how to? i know myself and many other new woodworkers could reallly use one. thanks and may you create many piles of sawdust

-- 20 year old new woodworker. advice and tools much appreciated.

Jimmy – Here are some pictures that should help you if you want to make one like mine:

If you use a 1/4” carriage bolt like I did drill the 1/4” hole very close to the edge of the lip 1 1/2” from the top. Drill a 1/2” counter bore on the back to recess the head.

If you don’t want to cut the rabbets you can do what SPalm did and just glue a 1/4” piece on top of square stock:

I also cite SPalm’s description for cutting the saw blade kerf on the piece with the bolt hole:

To compensate for the exact width of the blade, I came up with a technique. Cut both sticks to the same length by closing the device all the way shut. Cross cut through both sticks to make them flush. Now the stick without the end piece on it needs to be reduced by a saw thickness. Clamp and cut a piece of scrap on the right hand side of a miter gauge. Slide this stick right up to this scrap and cut. Exactly one thickness will be removed.

I’ve added a link to my Sketchup files in the original post if you want to download them. Let me know if you have any questions.

For usage instructions you can refer to the video for the original product:

You basically just flip the kerfmaker once you’ve cut one side of the dado.

-- You're a unique and special person, just like everyone else.

Greg, nice work. Of course being the slave driving teacher that I am, I have to ask, “What’s with that hole in your model?”

Are you using SU6 Pro?

-- Until you spread your wings, you'll have no idea how far you can walk.

I’m using Sketchup6 free version. I assume you mean the hole in the laminated version? I drew a rectangle on top of the original piece and did an intersect with model to get the circle transferred to the rectangle. It then got the lines in it once I pushed it through the piece. It was a quickie so I let it go.

-- You're a unique and special person, just like everyone else.

Yeah. That’s what I figured.

Just wondering why you haven’t upgraded to version 7.

-- Until you spread your wings, you'll have no idea how far you can walk.

I have version 7 and played with it a bit, but all the cool features I wanted were in the pro version. In the short time I have used it I didn’t see anything new that really grabbed my attention. Anything special you’ve noticed that might sway my opinion?

-- You're a unique and special person, just like everyone else.

One simple thing is automatic intersections of crossing edges. As a simple example of the value of that, draw a square and pull it up a bit. Now draw diagonal lines from corner to corner. Get the Move tool and hover over the intersection of the two diagonals. Click and pull up. In V7 you’d get a pyramid. In V6 there’s no real intersection so you don’t. You’d have to take an extra step by drawing the second diagonal in two steps stopping at the midpoint of the first diagonal.

There’s easier access to the 3D Warehouse if you upload or download models/components from there. Easier way to make a template for startup. That’s not a big deal really once you’ve got your template made.

The ability to open other V7 models. V7 will open any SKP file no matter what version it was made with.

There are some plugins although not many that won’t work in V6.

None of it may make any difference to you. Since its a free upgrade, though. why not?

What is it you want that’s only in the pro version of V7?

-- Until you spread your wings, you'll have no idea how far you can walk.

Keep it comin’. Let’s make this one of the most popular projects!

-- The time I enjoy wasting is not time wasted

Sweet.
Keep ‘em comming.

Steve

-- Stevethepeeve -- I'm no rocket surgeon

I was very interested in the dynamic components in 7, but it’s onlyin the pro version and I’m cheap.

I’m going to play with 7 some more. There was some reason I didn’t stick with it but I can’t remember what it was.

-- You're a unique and special person, just like everyone else.