I am a Primitive Man

The experience of digging a deep pit and planting wooden pillars allowed the senior brother and others to experience the usefulness of the bone shovel.

When Shenzi said that he would continue to make bone shovels, everyone was very energetic.

Even so, the efficiency of bone shovel production has not been improved. The biggest problem is not the selection and grinding of bones, but the holes drilled on the bone shovel for fixing the rope.

The current method of drilling is to select a hard rock, hit it, select a suitable thin slice from it, and process it again to make a pointed tool that can barely be called a stone drill.

Then he took the stone drill with his hand and began to drill holes in the solid bone.

Because the bone fragments were too hard, and the stone drills were not sharp enough, the drilling was extremely slow and laborious.

After drilling for a long time, the fingers of pinching the stone drill will become sore, and the wrist will become extremely tired, so that even the strong senior brother, the second senior brother, and the leader of the original pig tribe, Shang, have to drill. For a while, rest for a while.

Under such circumstances, it is very rare to be able to drill two holes in one day.

Regarding this situation, Han Cheng was helpless, and he also couldn't think of any good way to solve the current predicament.

It wasn't until he suddenly remembered that when he was very young, a group of bamboo craftsmen came to the village to make bamboo beds, tea tables, chairs and other things for some people in the village, that this problem was solved.

(Bamboo craftsmen are craftsmen who specialize in making various tools from bamboo, similar to carpenters, masons, blacksmiths, and masons.)

At that time, Han Cheng, like other children in Murakami, was extremely curious about this matter, and often stood by to watch how they turned bamboos into various exquisite and practical utensils.

Compared with others, Han Cheng was more curious about the tools they used to drill holes in bamboo.

It is obviously just a simple rope, a piece of bamboo that has been torn in half, and a long iron rod that is sharpened at one end and has a ring around the other end. It becomes a hand press drill that can be turned quickly just by pressing the bamboo down.

Han Cheng can still remember the scene when the bamboo craftsmen used this simple hand drill to drill holes in the bamboo.

After remembering this incident, Han Cheng, who was happy in his heart, immediately started to make the original hand press drill.

There is no iron rod at this time, but other things can be used instead.

Han Cheng found a sturdy wooden stick, not thick, only the thickness of an adult's little finger.

The stick was about forty centimeters long, and all the small branches on it had been cleaned up.

Then use a simple stone knife made in the tribe to split one end of the stick about two to three centimeters down the diameter.

Of course, this distance is not fixed, it needs to be determined according to the thickness and length of the upper part of the stone drill.

The thicker and longer the upper part of the stone drill, the longer the opening that needs to be split. On the contrary, the thinner and shorter the upper part of the stone drill, the shallower the opening that needs to be split.

After the opening at one end of the stick is cut, the next thing to do is to insert the upper part of the stone drill held in the hand into the broken opening, adjust the position, and tie it firmly with rope grass.

Then use a stone knife to carve a groove about two or three millimeters deep in the middle of the top of the other end of the stick.

It should be noted that this is different from just now. Just now, one end of the stick was split from the middle, but now a groove is carved to prevent it from splitting.

In this way, the stone drill is ready, the drill pipe is wood, the drill bit is the original stone drill,

After doing this, find a wooden stick about 30 centimeters long and 4 centimeters in diameter, and split it in the middle.

It's not that hard, just put the stick upright on the ground,

Then put the blade of the stone knife against the middle of the upper end of the wooden stick, and with the other hand hold a piece of wooden stick and hit the back of the stone knife.

As long as the stone knife is not inclined, the general splitting stick will not be inclined.

When striking stone knives, the reason why wooden sticks are used instead of harder stones is that the stone knives will be damaged if they hit each other, but hitting with soft wooden sticks will not happen. things.

Choose half-split wood, and use a stone knife to thin the two ends of the wood, so that it is easier to hold with your hands, and at the same time, carve small grooves on both ends of the wood for later tying ropes use.

After all these are done, find a piece of rope about one meter long twisted with three rope grasses, and clamp the middle part of the rope in the groove of the previously made drill pipe head.

Then turn the drill pipe clockwise (counterclockwise is fine) twice so that the rope wraps around the top of the drill pipe.

Then put the newly finished wood on the ground, step on it firmly with your feet, put the drill bit against the center of the wood, and then pull the end of the rope with one hand and pull it out together.

Because the rope was wrapped around the drill pipe before, if you pull it away now, relying on inertia, the drill pipe will also circle around, and the speed is still very fast.

After the rope is pulled apart and the drill pipe stops, the rope will be wound around the drill pipe again in the opposite direction by inertia.

Then pull the rope again, and the drill pipe will continue to rotate, repeating the previous action.

In this way, without rubbing by hand, the drill rod will rotate by itself and drill a hole in the wood below, which arouses the amazement of everyone in the Qingque tribe.

They all stopped what they were doing, and gathered around them to watch.

The elders of the Qingque tribe are better, because they have seen the miracle of the son of God, those who have joined the Qingque tribe and the original pig tribe, all of them stared in surprise, watching this incredible scene , amazed at the ingenuity of the Son of God.

It is indeed possible to drill things by pulling the rope by hand, but this also has a disadvantage, that is, the drill pipe is easy to be unstable due to the force when drilling, and the result is that the drilled hole is easy to deviate.

Another effect is that if you pull for a long time, your fingers will be hurt by the rope.

Only then will there be the wood that was made earlier.

Han Cheng removed the rope from the drill pipe, passed the drill pipe through the board that had already been drilled, placed the board about one-third of the bottom of the drill pipe, and tied the two ropes with a rope. end.

Of course, the middle position of the rope is still stuck in the groove on the top of the drill pipe.

After fixing it, a real hand press drill is ready.

When using it, turn the drill pipe twice as before, then put the drill bit against the place where the hole needs to be drilled, hold the two ends of the wood with both hands and press down, the rope wrapped around the drill pipe will be It will be loosened, and then drive the drill pipe to rotate in circles.

In this way, a real hand drill has appeared. Although the drill bit and drill pipe are simple enough, it is undeniable that this is really a traditional hand drill.

(Chapter 3 has been delivered, and comrades are welcome to give me a few recommendation tickets by the way after reading it. You are welcome, you must be ruthless, haha)