Primitive Technology: Water powered hammer (Monjolo)


I built a water powered hammer called a “Monjolo” (see also karausu (からうす) on google images). I started by making a water spout from half a hollow log to direct water from the creek. This was set up in the creek and water flowed through it. The hammer was made from a fallen tree. I cut it to size by burning it at the points I wanted it cut (to save effort chopping). Next I carved a trough in one end to catch falling water. This was done first with a stone chisel that was then hafted to an L–shaped handle and used as an adze. This adze only took about an hour to make as I already had the chisel head and cordage made of bark fibre to bind it with.
To save further effort carving I used hot coals from the fire to char the wood in the trough. I put the coals in using “chopsticks” (unused arrow shafts) to transfer them from the pit. The coals were fanned or blown with a wooden blowpipe till the wood in the trough burned. Then the char was scraped out. The sides of the trough were sealed with clay to make sure the wooden sides did not burn away which would effectively decrease the volume of the trough. This was approximately 8 hours work over two days.
With the trough carved I made a hole in the middle of the log as a pivot point. Using the same char and scrape method I burnt a hole right through the log using hot coals and a blow pipe. Again clay was used to prevent wood burning where it was wanted. To burn through the approximately 25 cm diameter log it took about 4 hours and 30 minutes. Another hole was burnt in the end to fit the wooden hammer head and it took a similar amount of time. 
A tripod lashed with loya cane was set up at the water spout. The axel of the hammer was tied to one leg, the hammer fitted onto the axel and the other end of the axel tied to another leg. The trough was positioned under the waterspout to collect water and the tripod adjusted so that the resting point of the hammer was horizontal (so water wouldn’t prematurely spill out of the trough).
The trough filled with water, outweighed the hammer head and tilted the hammer up into the air. The water then emptied out of the trough (now slanting downwards) and the hammer then slammed down onto an anvil stone returning to its original position. The cycle then repeated at the approximate rate of one strike every 10 seconds. The hammer crushes small soft types of stone like sandstone or ochre. I carved a bowl into the anvil stone so that it would collect the powder. I then crushed old pottery (useful as grog for new pots) and charcoal. Practically speaking, this hammer worked ok as a proof of concept but I might adjust it or make a new one with a larger trough and bigger hammer for heavy duty work.
This is the first machine I’ve built using primitive technology that produces work without human effort. Falling water replaces human calories to perform a repetitive task. A permanent set up usually has a shed protecting the hammer and materials from the weather while the trough end sits outside under the spout.  This type of hammer is used to pulverise grain into flour and I thought I might use one to mill dry cassava chips into flour when the garden matures. This device has also been used to crush clay for porcelain production. A stone head might make it useful as a stamp mill for crushing ores to powder. It might pulp fibres for paper even.
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Mason Holly #20
THIS DUDE IS AMAZING!😂
The Stoned Videogame Nerd
Perhaps this is better used to make noise and keep animals away then to lets say forge Steel ;)
Hayley Mills
I love this channel but this video was really pointless and i cant be the only one to think it
Alucard Pawpad
A lot of dedication and devotion there. Quite amazing. :D
Daniel
this is so cool
Corben Dallas
como han evolucionado las licuadoras antes eran como 2 hrs para una salsa ahora en 2 min ya esta lista
Mattias Lundberg
but why tho?
agung andy
The happiest man in the world
grutraz
When you can do auto everything
TOA TA
@Primitive Technology i wouldnt crush charcoal close to my stream becuse inwouldnt want it to contaminate water
Andrew Tran
is there a way to make it faster lol
Gino Salerno
Hey this guy has a big depresión, please some one help him.
Changedma Name
where do i find a guy like him? i wanna marry one
Ricky Evans
Wow very neat
McDastardly
The first robot.
J Blob
Where are these videos made? What country/region?
Mustard On My Anus
All that work just to smash a little rock...







JUST KIDDING - There are so many uses for a Monjolo - ps This is a pretty cool video
nick
Christian bale is that you, is this why you aren't in batman anymore?
Joe Archuleta
I saw something like this on a Beverly Hillbillies. Only one i ever watched
Pal Toshiba
congratulations!
Đại Nguyễn
Như một thằng điên
Eduardo Gimenez
cara, você é incrível!!!!
VEO
he is cutting tree with fire??? wtf
Sam Russell
Whater powered forge blower
vzgsxr
Whack some of your sweet potatoes im there.
BOOM, mashed potato!
KING Quantum
1 year later building car haha your amazing dude
Ron Stoppable
what is the white stone u use to burn through the log plz sir?
The Golden TNT
If you could have any 2 people in the world during a zombie apocalypse who would you take?




I would take this guy and ZNA Productions (because melee weapons don’t need ammo)
Pandaweed Xl
This is pointless it's to slow to be productive and it doesn't hit hard enough
Biggie Sneeze
I don't know why but that water sounded refreshing af
Michael Dumanski
don't put your hand in it :o
mickey cos
the way we are meant to live.
Jacopo Barberis
I think calling it technology is an understatement as it's closer to actual engeneering.
Indo Boyce2
After World War 3rd ...i believe you still life....
Trip Kipp
So smard
Marko Gidej
Damn robots taking away human jobs
Cylen Smith
Where are these filmed? My guess is the Philippines?
Sıradan Filozof
Türkler beğeniyor I like
Kreek BLOX
Does he live in the woods?
Richard Salzmann
Cool but, what is this good for?
frenk loner
Производительность ниже ручного труда . Не рентабельно . It's full cheat.
adam burdt
This just doesnt seem practical to me
Kainenrox :: Sahbastion Hopson
When a tree falls in a forest with no one there to hear it... will primitive technology come and turn it into a giant hammer?
Jpark S
Would be good for a sort of locator device. If you get lost or ur in the dark you could listen for the banging
John Becker
Half of me is like couldn't you just do this manually in like 4 seconds and the other half is like ooooo shit this is cool as fuck
lobsterlord63
Minecraft in real life
TheGoldenPig{Anthony Winter}
Next video: how to make WIFI and The Internet😂😂😂
samo0510 karagash
Wtf you speak
marwiji kasanpawirow
Bear grylls who?????
不惑灸
鹿おどしを実用化したものか
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