"This is a special bearing. Ross...... Are you mistaken? ”

Tan Lin couldn't help but doubt Ross, who has been dealing with bearings all year round, and it can be said that the quality of the bearings can be distinguished by Tan Lin as long as he takes a look.

The black, rough thing in front of him was really different from the special bearing he imagined.

Among the three old stubborns, the chubby old man Yang had already sympathized with Tan Lin.

"Alas! Tan Lin! I kindly reminded you not to cooperate with this little liar, you don't believe me. How about now? Deceived, is it comfortable? 10 million funds have been wasted, are you comfortable? People take something that you don't even want to collect rags to bluff you, saying that it is a special bearing, and the joke is dead. ”

"This kid is so hateful, Tan Lin, if you are smart, hurry up and get the contract, sue this little thing, send this kid liar to the prison cell, and let him sit in prison. The contract he signed with you said that it was good to engage in special steel, not to engage in this. ”

"Alas! Tan Lin, this time you can only admit it, even if you send this little liar to the prison cell, your 10 million will not come back. ”

The three old men have already proclaimed themselves experts, and they have already identified Ross's bearing as tattered, that arrogant and cold, and even looking down on Ross's attitude when killed, so that Tan Li, who has not spoken, can't help but speak.

"Three grandfathers, I have respected you since I was a child. But you guys are underestimating Ross too much. Why do you keep thinking he's a liar? I'm also worried that Ross cheated my dad out of 10 million. Don't forget, Ross relied on heating rods, and he earned more than 10 million just by making the order from the military. Even without my dad, this special steel and special bearing, Ross can still make it. It was only to thank our Tan family that he proposed to let my father invest 10 million to develop special steel technology. He succeeded, and you see. ”

"We're out of sight? Lili, have you fallen for this kid's evil! This is obviously a broken bearing. ”

Old stubbornness is old stubbornness, and if they think it is wrong, then it must be wrong, and they think that they are absolute authority.

Rose sneered: "I can also be regarded as serving you three stubborn old men, this bearing is made by me manually, and it is naturally ugly." But in terms of performance, the world can't find the second one. Uncle Tan, don't pay attention to the three old guys, you take this bearing to test the performance, and you will know that it is right or wrong. ”

"Okay, I'll test it." With a skeptical attitude, Tan Lin took the bearing to the company's testing room.

The three old men seemed to be eager to see Rose's joke and followed.

In the test room, Tan Lin personally tested the performance of the bearing.

Tan Lin first did a 'contact fatigue resistance' test for the bearing.

Under the contact of cyclic load, the bearing will easily be fatigued and damaged, and cracks and peeling will occur, which will affect the life of the bearing.

After a high-speed rotating machine is set on the bearing, it rotates at a high speed of 90,000 times per minute, and there is a gravity hammer at one end of the machine, after adjusting the speed, it will continuously knock on the surface of the bearing with the minimum force to test how strong the fatigue resistance of the bearing is.

This first test, a full 1 hour of testing, the speed of this testing machine was adjusted to the limit, the speed of the gravity hammer hitting the bearing was also adjusted to the limit, even the best performance of the Z-class bearing, ordinary bearings can withstand the fatigue test of 50 minutes at most.

However, these ugly bearings made by Ross were overloaded and tested, and there were still no surface cracks or peeling.

The wear resistance of these bearings has exceeded the limits of all bearings.

Tan Lin was instantly excited: "This is the best bearing I have ever seen, judging by the wear test, the life of this kind of bearing will be 2 times the life of the existing bearing, or even longer." ”

The three old men were also taken aback by the wear resistance, and the fat old man still couldn't believe the test results, and snorted unhappily: "What's the use of just the wear resistance of the bearing surface." The key is to see how strong the vibration speed of the inner channel and the ball can withstand, and the hardness of the bearing is also the most critical. ”

Ross didn't even pay attention to the three old men, and said to Tan Lin as plain as water: "Uncle Tan, you can continue to do the 'vibration acceleration standard test'." ”

"I'll try." Tan Lin was already excited.

Now the bearing is again put on another testing machine, which does the 'vibration standard test'. It is used to detect the performance of the bearing at high frequency, medium frequency, low frequency and vibration section speed.

The testing machine began to rotate at high speed again, and while rotating, the machine also vibrated at high speed at various frequencies.

This test will completely test the ability of all parts in the bearing. Poor quality bearings, in this test, the inner ring will be deformed, or the ball will peel off, or break.

Another half an hour passed, the machine was adjusted to the limit again, and the bearing began to heat up slightly under the test, but there was no abnormal phenomenon, and the parts inside the bearing were intact.

After Tan Lin saw the performance of the bearing, his eyes were red with excitement, and he couldn't help but scream.

"It's great, the quality of the bearings is divided into V, V1, V2, V3, V4. Bearing quality up to V4 means the highest standards. If the quality of these bearings is divided by V, at least V6, far exceeding the international standard. There is no doubt that this is really a special bearing. Rose, you're fantastic. ”

The three old men who didn't believe that Ross could make special bearings were killed and suddenly their faces changed greatly after seeing these sex tests, but they still didn't give up.

The old man snorted sourly: "Before it passes the hardness test, this bearing is still a waste." ”

Tan Lin almost couldn't help it, and wanted to refute these old men, but because of his seniority, Tan Lin was not angry, so he handed over the bearing to this old man Wang: "Uncle Wang, you can do a hardness test." lest you not believe in other people's tests. ”

"Just try, I don't believe that what the country can't come up with, this kid can do it."

After the old man Wang took the bearing, he took the bearing to another testing machine, which was used to test the hardness of the bearing.

The machine rotates at high speed again with the bearing, and the diamond hammer at the other end of the machine hits the various parts of the bearing with different speeds and forces.

The general bearing hardness reaches 61 to 65HRC, which can be qualified.

After a few minutes of testing, the hardness of the bearing reached 65HRC, and there was still no damage.

After testing again, the hardness of the bearing reached 70HRC, which is already beyond the national standard.

"How can it be so hard...... Could it be that this is really a bearing made of special steel, which is too hard. ”

The three old men's hearts were cold, their hearts were very weak, and their faces became extremely ugly.

Rose looked at the expressions of the three old men who were about to die, and his heart was really happy, and he decided to deal a complete blow to them. Ross walked to the testing machine and pushed away the fat old man: "Don't grind, just adjust the speed to the highest and the strength to the maximum." ”

Ross directly turned the tester to the fullest.

In the limit of the testing machine, the hardness indicator above, the pointer jumps to the highest and then does not move.

"Ahh The hardness of this bearing exceeds HRC85, and only the Rockwell hardness can measure his hardness, which is really a special bearing. ”

was about to spurt out a mouthful of old blood, and the old man Yang who was standing in front of the testing machine, after being strongly stimulated, suddenly his blood pressure increased, and he, who was already fat, fainted. The remaining two old stubborn stood on the ground stupidly, their faces flushed and green, and they didn't know if they wanted to cry or laugh.