The material problem of the pin

our material is 40r, and the card yellow is made of elastic yellow
The distinction of good pin and difference pin: bad pin son just install go up of card seat, pin son and dou tooth did not dig a few shovel pin son to drop or be partial, in fact this is card yellow of quality bad reason, when install pin son card yellow bad, this is not artificial reason.The reason is that the card yellow does not have enough to go up, in the pin hole into the tooth seat card yellow is reduced, in fact, when digging the inside of the pin will move, did not do a few days will move the pin and tooth seat hole because of mutual wear and make the hole more and more grinding, so this tooth seat is not far from scrap.On the other hand, with good Huang Yongyuan pin inside card is up tight, won’t appear the situation mentioned above, as for the color of the pin, in fact, no matter what pin in the process of production, what color do you want to make is what color, it also has nothing to do with the quality of the real material is bad, color is good and what use?

Here are our pins