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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Furkan Aydın Zengin
türkmüsünüz lütfen söyleyin
Tom Pringuer
been watching this guy for like almost a year and still amazed
lance wong
I cant belive this guy... first he makes all of this cool primitive things or "technology" and second he walks in the water walks out and steps on rocks dried leaves and sometimes sand and Do you know how annoying that is? haha
Can't appreciate this kind of video if it's shot on modern cameras. Make a camera out of stone and wood and then we can talk.
Muhammad Azhari
how does he charges ths camera battery
BuzisRu Buzytsky
отвал башки, как круто. наши предки были совсем не глупые
Cindy C
im new to this channel & have no idea what is going on
Lord DuckingTon
Maybe he is muted?
So ancient man had the noise pollution of industry ringing through the forest pretty early on, huh?
Margarita Planas Rivarola
Aaron Wag
Do you own the property that your camp is on?
Hodlwte sss
başlık nie türkçe mk
Sarcastamus Raconteur
when the grid goes down i'm finding this guy and following him around like a lost puppy
Victor Møller Andersen
Jasper Nolan
we all know what channel to go to when robots take over
you can make real drill on same skale. can you make video about it plz
Akash Guha
So back in the day who who every figured out agriculture of MJ was baked out if existence
khairul anuar
Yêu Diệu Anh
Tupac of the neanderthals !
Rashed Al Rais
too slow though
Apple Juice
o just want to know who the hell disliked the video this guy is very intelligent and using his sources it just amazes me how he has that much patience.
Mr Inappropriate
And behold the first bud crusher
R. Palmares
Cara tu é um monstro da sobrevivência, assisto a todos os seus vídeos.. muito bom..
Sales Department
I work, I provide for my family, I study, and contribute to society daily but watching one of your ten minute videos makes me feel like a bum. You're awesome man.
Awesome video really amazing to see how people used to live a long time ago
Emma Dal Degan
Can you please make a video about making shoes?
I know some simple ways but I'm sure I can learn other (and more efficient) methods from you
Thanks and keep up the wonderful work!!
Sato Yoshi
Navjyoti Dunia
best video
Emrys Ariana
you are a very patience man to do all these patienly.
My god i would love to build that hammer, just to annoy the fuck out of my neighbors.
April Louise
that is from filipino
sandman D
This guy to good, that I won't mind joining him, wish I know the place.
iShell Beat
Next thing you know he is gonna make an water mill to crush grains to make bread😑😐😶😏😎. 😂👌
iShell Beat
Dude why do you never use your stuff from other vids
You have the pump drill for making fire and stuff and in other vids you don't use em either
But just so you know I ain't a hater, I just want to see him use his other "inventions"
Emma Dal Degan
Maybe he's mute
Nam Thai
kiên tri hay quá
ميشو الشمال
الي من السعوديه لايك
Kyle Hoffman
Subbed cuz this my shit
Cona 6789
Attach a rock to the hammer part of it to make it hit harder, and last longer
Kriseq PL
it's amazing bro
Rauny Farias
I bet he could build up an entire computer only using clay, water and wood
Jonathon Reddick
These videos are are a great stress reliever for me. In a rainforest with the sounds of birds, insects, rain. It is the ultimate relaxing video!
And that, ladies, is where natural make-up comes from.
Chapte -
this could only be prototype of course , otherwise its failed project.
tyler maloney
Gotta tell me how to keep the bugs off bro.
Welcome to Monjolo press channel and today we will be crushing rock. Will only take 2 hours.
Erol Jr
Who knew acting like a caveman could make you look so smart
Ahmad Shahzad Abd Wahab
A few years later:Nuclear Bomb
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