Kerfmaker in finnish plywood

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Project by StudioFormaat posted 111 days ago 2297 views 37 times favorited 17 comments Add to Favorites Watch

My version of this handy tool is made of 18mm Finnish-birch plywood [one of of my favorite materials] and can handle up to 75mm stock. The design is minimalistic in approach. With rounded corner on the sliding bar that cradles the thumb when the bar is pushed against the wood for a close fit. A large screw is inserted at the rear end for fine adjustment.

17 comments so far

View HillbillyShooter's profile


3860 posts in 799 days

#1 posted 111 days ago

Definitely like your design and the minimalist approach—thanks for sharing and a definite favorite!

-- John C. -- "Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth." George Washington

View BTimmons's profile


1912 posts in 992 days

#2 posted 111 days ago

I like the simplicity of it. Welcome to Lumberjocks, by the way.

-- Brian in Arlington, TX

View Sanding2day's profile


784 posts in 353 days

#3 posted 111 days ago

Welcome to LJs… Pretty slick design, added to favorites… Thanks for sharing…

-- Dan

View ratchet's profile


1270 posts in 2293 days

#4 posted 111 days ago

Very nice! I do favor the functional almost Scandinavian look to it. Question: isn’t the screw used to adjust to thickness of the saw blade?

View RockyTopScott's profile


1086 posts in 1985 days

#5 posted 111 days ago

Looks like he built the kerf into the design.

-- “When you want to help people, you tell them the truth. When you want to help yourself, you tell them what they want to hear.” ― Thomas Sowell

View hoss12992's profile


2273 posts in 400 days

#6 posted 111 days ago

Great job and welcome to LJ’s

-- The Old Rednek Workshop

View Philip's profile


1018 posts in 1046 days

#7 posted 111 days ago

That looks sharp. How does the screw adjust? Welcome to LumberJocks!

-- If you can dream it, I can do it!

View woodchuckerNJ's profile


483 posts in 141 days

#8 posted 111 days ago

I don’t understand how this one works. How do you adjust for kerf?
What does the screw adjust?

-- Jeff NJ

View stevo_wis's profile


63 posts in 1534 days

#9 posted 111 days ago

It looks like a nice job. I am embarassed to say that I dont know what it does. What is it’s function please?

-- Stevo

View dawsonbob's profile


259 posts in 262 days

#10 posted 111 days ago

I’d like to know the function, too. I’ve never seen one of those before. Whatever it is, it looks really, really nice. Good job on whatever it is.

View ediazf's profile


16 posts in 1012 days

#11 posted 111 days ago

favorited… loving it. I was thinking a while ago on building on of these and yours surely look like what I wanted to do but, i think, I am not able to do so cleanly.

Nice work!

inspired on this one?

works like that, isn’t it? (Just that the kerf if fixed..?).

View dawsonbob's profile


259 posts in 262 days

#12 posted 111 days ago

Ah-haaa! Thanks for the link, ediazf. Now I get it, but I don’t think I would have figured it out just from the pictures. I can be pretty dense on days that end in the word “day.”

View Greg In Maryland's profile

Greg In Maryland

354 posts in 1505 days

#13 posted 111 days ago

I think that he uses the phillips screw on the end to increase/decrease the kerf by screwing it in or out. Or at least that is my take on it.

StudioFormaat that is a nicely done tool and your photography is stellar!

Welcome to LumberJocks!


View ediazf's profile


16 posts in 1012 days

#14 posted 111 days ago

I think that the kerf is already set when the end of the jig is flush (I think you can see that there is a kerf like space on the inside part where the two pieces meet). All you have to do then is to place the wood piece on the slot and you have the correct spacing for your second cut….

That what I am thinking… is too late here (Chile, south america) for my brain to function well.. I am giving it another thought tomorrow and maybe even try to build one for myself :)

View Bsmith's profile


291 posts in 1177 days

#15 posted 110 days ago

Plywood never looked so good.

-- Bryan

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