Kerfmaker in finnish plywood

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Project by StudioFormaat posted 241 days ago 2973 views 38 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


4510 posts in 929 days

#1 posted 241 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


2117 posts in 1122 days

#2 posted 241 days ago

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

-- Brian Timmons -

View Sanding2day's profile


964 posts in 483 days

#3 posted 241 days ago

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

-- Dan

View ratchet's profile


1289 posts in 2423 days

#4 posted 241 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


1136 posts in 2115 days

#5 posted 241 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


2631 posts in 529 days

#6 posted 241 days ago

Great job and welcome to LJ’s

-- The Old Rednek Workshop

View Philip's profile


1106 posts in 1175 days

#7 posted 241 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 (online now)


876 posts in 270 days

#8 posted 240 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


64 posts in 1664 days

#9 posted 240 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


381 posts in 392 days

#10 posted 240 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.

-- Mistakes are what pave the road to perfection

View ediazf's profile


17 posts in 1141 days

#11 posted 240 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


381 posts in 392 days

#12 posted 240 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.”

-- Mistakes are what pave the road to perfection

View Greg In Maryland's profile

Greg In Maryland

391 posts in 1634 days

#13 posted 240 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


17 posts in 1141 days

#14 posted 240 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


300 posts in 1307 days

#15 posted 240 days ago

Plywood never looked so good.

-- Bryan

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