LumberJocks

magnetic kerfmaker

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Project by twokidsnosleep posted 10-25-2010 06:20 AM 3050 views 4 times favorited 8 comments Add to Favorites Watch

Ok I found these photos and will finally post a Kerfmaker.
I still have to do an end grain cutting board and what else to get my LJ merit badge??

My kerfmaker is made from exotic wood cut offs I got for $7. It works with a rare earth magnet on one side and a metal rail made out of nails on the other.
I love the look, finish and feel of this tool and though I find it less than useful, it was fun to make and finish. I should have been more precise with the nail placement to allow for finer adjustment.

It was also a lesson in seat of my pants modification to account for multiple screw ups that I will list:
1. It was intended to have a ‘traditional’ wing-nut and bolt fastening but I cut pieces too narrow so no bolt room
2. Had to inlay a pine strip filler to account for lack of offset for thickness and to allow the two halves to meet perfectly
3. Made a groove in opposite side to allow pine strip filler to run in and help hold the darn thing together
4. Stuck in a magnet to help hold two sides tight as friction wasn’t enough
5. As mentioned metal rail could have been better aligned and closer to allow low end fine adjust

It was quite comical facing the continued challenges I made for myself in creating this…a true comedy of errors. There were no formal plans, just a quick drawing made and I thought I could bang it out. Really do love the look of it though.
Cheers, Scott

-- Scott "Some days you are the big dog, some days you are the fire hydrant"





8 comments so far

View dorran's profile

dorran

140 posts in 1924 days


#1 posted 10-25-2010 07:39 AM

Nice. You will need to build a grease pot for the lumberjock trifecta. I also find that the simple can quickly turn complicated but that’s what makes it challenging. Where is the screw to adjust for the kerf?

-- Life is about choices. You can spend a lot of money on furniture and have really nice furniture; Or you can spend a lot on tools and have even more expensive, crappy furniture. I made my choice.

View TopamaxSurvivor's profile

TopamaxSurvivor

14874 posts in 2365 days


#2 posted 10-25-2010 08:18 AM

That is what I was wondering, were is the kerf? I like the magnetic boltless design :-)

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View mafe's profile

mafe

9561 posts in 1779 days


#3 posted 10-25-2010 12:27 PM

Hi,
Interesting with a new version.
How do you set it for your blades?
Best thoughts,
MaFe

-- Mad F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

View twokidsnosleep's profile

twokidsnosleep

1063 posts in 1663 days


#4 posted 10-25-2010 05:52 PM

mistake 6. Oh darn now I have to modify it again…ok, appropriate blade-kerf screw hunt begins :)

AHH yes, the grease pot..my boy (and I) made one out of pine, but he is unhappy with the stain’s look and wants me to find something darker. Good thing he is not a perfectionist like his old man.

So the tifecta is 1. Kerf maker 2.Grease pot and 3.End grain board ????
This is like being in the boy scouts trying to earn the ungiven badge of honor. Perhaps an electronic badge of accomplishment might spurn one on.

Thanks for looking

-- Scott "Some days you are the big dog, some days you are the fire hydrant"

View BobAnderton's profile

BobAnderton

59 posts in 1480 days


#5 posted 10-25-2010 08:36 PM

Hey Scott, thanks for posting your kerfmaker design. I have a question that may provide food for thought. In use, you’ll be sliding stock up against the kerfmaker with the kerfmaker between a stop block and the stock you are cutting, making one cut, spinning the kerfmaker 90 degrees and sliding the stock up against it again to make the other shoulder cut. You want those two pieces locked together well enough that they don’t slide with respect to each other when you slide your stock up against the kerfmaker. I’m thinking the magnet/nail rail concept isn’t going to be strong enough to keep those two components from sliding with respect to each other during use, you know? You’ll need some way to lock it down. That said, you’ve got it in your hands, so let me know if I’m dead wrong there. Check out Mafe’s blog post on how to use the kerfmaker if you haven’t already. It’s pretty sweet. http://lumberjocks.com/mafe/blog/18170

-- Bob Anderton - Austin, TX - Nova 3000 lathe, Alaskan Mark III mill, Husqavarna Saw

View twokidsnosleep's profile

twokidsnosleep

1063 posts in 1663 days


#6 posted 10-25-2010 08:41 PM

Bob, I think you nailed it here. My design by accident, is more to look at than for function.
You are dead right that it is not strong enough to stop from moving off your set position unless you are super careful.
My test drives proved that to me, which is why I described it as less than useful.
It is kind of a “trophy-kerfmaker” rather than a workhorse :)

-- Scott "Some days you are the big dog, some days you are the fire hydrant"

View BobAnderton's profile

BobAnderton

59 posts in 1480 days


#7 posted 10-25-2010 08:51 PM

Ah, thanks for that. It’s too bad because it was an elegant design. As Thomas Huxley said “The great tragedy of Science: the slaying of a beautiful hypothesis by an ugly fact”. Be sure to let us in on your Mark II model!

-- Bob Anderton - Austin, TX - Nova 3000 lathe, Alaskan Mark III mill, Husqavarna Saw

View twokidsnosleep's profile

twokidsnosleep

1063 posts in 1663 days


#8 posted 10-26-2010 05:32 AM

Yes, model 2.0 will have to incorporate improvements, maybe.
I actually will move on to other projects in attempt to improve my skills, the kerfmaker turned into a problem solving exercise with aesthetics a bigger concern than function…my fault, I’ll learn from it.
Thanks again for looking guys and gals
Cheers

-- Scott "Some days you are the big dog, some days you are the fire hydrant"

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