A few decades later, all sorts of bearings were all over the streets.

But in general, there are only two kinds, that is, roller bearings and ball bearings, which also have their own advantages and disadvantages.

Relatively speaking, the friction of ball bearings is less and the movement is lighter, while roller bearings have relatively high bearing capacity and longer service life because of their structural shape, but in terms of lightness, they are slightly inferior to roller bearings.

But this lightness is also relative, for the current use of Zhang Ran equipment to install this bearing on the chicken bus, whether it is a roller bearing or a ball bearing, there is almost no big difference.

After all, how much can a chicken bus load?

On the contrary, it can make the roller bearing last longer and more durable.

However, even if the roller bearing is more likely to be successful in manufacturing for the industrial level of the second workshop, there is still a problem that they urgently need to overcome if they want to be truly successful.

That is, in any case, the accuracy of the rollers is still very high, otherwise the friction between the rollers will intensify, which will greatly increase the kinetic energy and cause great energy consumption.

This is also a problem with ball bearings.

"It's easy to solve this - just find a way to separate the roller and the steel ball, so that they don't contact each other, only the inner and outer steel rings, can't it?"

Hearing that Cheng Dongshan, Cui Sanyuan, and Niu Da and a group of people were actually worried about this problem, Zhang Ran smiled disdainfully, and confidently tore off a note, and simply tore out a few small holes on it and put the small steel balls inside......

Several people immediately had an epiphany of clearing the fog and seeing the blue sky, and they said that they were convinced!

"Team Zhang, what the hell is your brain? A few of us can't figure it out for days on this issue......"

Niu Da looked at Zhang Ran with admiration, and there was a kind of reverence like watching the gods descend to earth.

"Nothing else, think more, watch more, come on, you can - I'm optimistic about you......"

Zhang Ran patted a few people on the shoulders with a smile to show encouragement, and then in the eyes of everyone worshipping, he took small square steps with his hands behind his back, and walked away......

The back, quite a bit of a thing, is gone, hiding deep in the demeanor of the famous man.

"It's a pity that our team Zhang was born in this troubled world, otherwise, he would definitely become a great inventor!"

Cui Sanyuan sighed from the bottom of his heart, and felt sorry for Zhang Ransheng who was born in the wrong era.

Cheng Dongshan did the same, and then said happily: "If we use Team Zhang's method to separate the steel balls, the steel balls do not collide with each other, and only contact with the steel rings, then even if the precision of the steel balls is slightly worse, it should not be a big problem......

"That's right!"

Hearing this, Niu Dayi patted his head and said, "I'm going to hit a few thin iron sheets to fix the position of the steel balls, and let's experiment again......"

Hearing Cheng Dongshan and Cui Sanyuan's words behind him, Zhang Ran only felt comfortable, and that feeling was much more comfortable than being slapped in front of him.

As for Niu Da saying that the iron sheet is used to fix the position of the steel balls and separate all the steel balls, Zhang Ran did not remind him too much, and asked him to pay attention to the uniform distribution of the spacing of each steel ball, so that all the steel balls can be evenly stressed in the steel ring and other places that need to be paid attention to......

Sometimes, making suggestions and letting them gradually improve and solve them by themselves is conducive to allowing them to expand their thinking.

If he is all-encompassing, although Zhang Ran is well-informed, and he will explain the matter in one sentence, if everyone forms a dependency mentality, and whenever he encounters any difficulties, he is waiting for him to think of a way instead of brainstorming by himself and others, and solving the problem by himself as much as possible, it will be a matter of harm to the development of the detachment.

Zhang Ran didn't want to be glared at one day, and the people in the entire base area were waiting for him to give answers with all kinds of questions.

Near the detachment, the training of four platoons was in full swing.

In addition to regular running, running with a crossbar, crawling forward, climbing over obstacles, etc., the training items such as tactical cooperation between platoons, position intersperse, one-on-one, platoon-to-row stabbing and other training items have also been added.

Of course, the training of marksmanship, precision bomb throwing, etc., in special training, is also in full swing.

The marksmanship bomb throwing contest once every three days has become a carnival day in the base area......

In this kind of extremely competitive training, the twelve fighters who were already good marksmanship have gradually developed the demeanor of sharpshooters!

From the initial large-range target, Zhang Ran has improved it into a ten-ring counting target used in shooting competitions in later generations, otherwise there is no way to distinguish who is first and who is second, and the gap between each other's shooting level is extremely small!

Zhang Ran was already thinking about whether to find a way to create a moving target to make them continue to increase the difficulty of the competition.

In addition to the marksmanship, the bombing level of the twelve fighters who accurately dropped bombs also increased rapidly.

Now the distance of the bomb has increased from 30 meters to 35 meters, and the size of the back fence has also been greatly reduced, and these twelve soldiers can accurately put three or four into the back cage every ten times......

Driven by these 24 soldiers, all the soldiers of the four platoons are also making rapid progress in their marksmanship and bomb-throwing skills......

Of course, the consumption of bullets ......

Zhang Ran doesn't even want to think about this now.

Anyway, he now has to strictly limit the number of soldiers who practice live ammunition every day, and even the twelve soldiers who have special training in marksmanship are only given eight rounds of ammunition every day!

Otherwise, even if the people sent by the base area could more or less cushion Xu Song's self-defense force and come back, Zhang Ran doubted that when it was really time to send troops to Cangshui, whether the bullets on the soldiers of the detachment would have a chance to reach the standard of three guns and eight roads, it would be a problem.

Therefore, when Lu Yan came in again with a small bag and handed over more than 100 rounds of wool from the new mattress to Zhang Ran, Zhang Ran's expression when he looked at those bullets was like looking at gold, his eyes were shining, and he couldn't help but thank the eighteenth generation ancestors of the Xu Song family in his heart......

Thank you very much.

Although there is little wool, it is better to have a stable income and low danger!

But when Zhang Ran saw the wheel of a motorcycle again, Zhang Ran was a little unhappy: "Didn't you say that we would wait until we finished playing Cangshui and then go to fight Xu Song's motorcycle?" That motorcycle is a necessary thing for Xu Song to pretend to be forced in the county, a while ago I dismantled a wheel of people I heard that Xu Song is crazy, looking for wheels everywhere, you are giving a talent back, that Xu Song does not vomit blood......"

"The demolition of those security teams has been dismantled, we can't help but continue......"

Lu Yan held back a smile and said, "If we don't continue, then who will help us steal the engine of the motorcycle for some benefit in the future?" ”

"That being said, but I'm just worried that Xu Song will go crazy and come to us for trouble-now that I'm about to send troops to Cangshui, I don't want to be attacked at this juncture!" Zhang Ran said.

But although I am worried, this is not dismantled but also dismantled, of course Zhang Ran has no reason to return it, so let people take this wheel back and put it in the warehouse and keep it well.

In case there is a chance to make a small cannon or something in the future, when the bearing is modified and modified with these two wheels, maybe you can drag the cannon around, and the effect will be great.

Thinking of the cannon, Zhang Ran thought of Xu Song's gasoline barrels and asked, "Those guys just want to dismantle the wheels, didn't you tell them to get the gasoline barrels out?" ”

"The gasoline barrel is too big, and it won't be easy to get that thing out without being discovered, so it's not easy to ......"

Lu Yan said, a little curious and asked, "Brother Ran, I've heard you mention this gasoline barrel several times, what do we want this gasoline barrel for?" Isn't it nice to put the gasoline you brought back last time in a clay jar......

Zhang Ran was speechless, and said in his heart, "Do you think I want this gasoline barrel just to get back the gasoline that I exchanged before loading it?"

What about me?

I'm trying to make a legendary artifact out of gasoline cans, okay?

Of course, Lu Yan didn't know Zhang Ran's thoughts, and said something about the crops in the experimental field that grew very well after being watered with ammonia, but there was no excess fertilizer, and after mixing ammonia fertilizer according to the current ratio, it should be no problem, so he said a little awkwardly: "Brother Ran, do you care about Kang Tingcheng?" ”

"What the hell is wrong with you?"

Kang Ting has been training the team every day for a while, and he has to be responsible for the marksmanship of the dozen or so soldiers who have received special training, and it seems that his performance is quite normal, and Zhang Ran has almost forgotten the idea that the guy said before that he wanted to fight Lu Yan.

"It was okay before, but in the past few days, that guy has started to run to my door to sing in the middle of the night......," Lu Yan said.

Burst......

Zhang Ran, who was drinking water, choked on water and squirted out of his nostrils and said: "I said that in the middle of the night in the past two days, it always seems that I heard something crying wolf, and I thought it was a dream - I did it for a long time, and it turned out that this guy was singing love songs to you......"

"Brother Ran, are you still in the mood to laugh?"

Lu Yan glared at Zhang Ran with an annoyed face, and said with a resentful look in his eyes: "What kind of love song, the ghost knows what he sings, I can't understand a mouthful of Sichuan dialect and can't sleep because of the noise, and now some people everywhere say that I gossip, and he doesn't listen to it, and I'm angry......

"Out of phosphate rock, out of phosphate rock......"

Zhang Ran didn't dare to look at Lu Yan's eyes, coughed dryly twice, and was about to say that he was looking for a chance to talk to Kang Ting, but he really didn't want to interfere too much in this kind of emotional matter.

But at this time, the villagers who were digging phosphate ore outside the village and preparing for the preparation of phosphate fertilizer broke out into bursts of cheers like a tsunami!

After seven or eight days of continuous fighting, digging and bombing, the rock layer outside the mountain was finally completely removed, and the dark black phosphate mine was finally displayed in front of everyone with the joint efforts of countless people......