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The coarse tooth of screw thread fine tooth cent
Common thread has coarse tooth and fine tooth cent, same nominal diameter can have a variety of pitch, among them the person with the largest pitch is called coarse tooth thread, the rest is fine tooth thread. Along the axis direction, clockwise rotation of the thread becomes right-handed thread,...Read more -
Method of preventing looseness of outer hexagon bolt
Why should hexagon bolt prevent loose, it is to can better more permanent more useful thing.So, hexagonal bolt connection what is the method of preventing loose?The following five kinds of introduction, the first: friction control method;Second: mechanical control method;Third: permanent preventi...Read more -
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 ins...Read more -
Notes for quality of bolts
Notes for quality (1) surface rust, grease, burrs and welding burrs on bolt hole walls should be cleaned. (2) after the contact friction surface is treated, it shall meet the requirements of the specified anti-sliding coefficient.The high-strength bolts used shall have matching nuts and washers, ...Read more -
The difference of high strength bolt friction type and pressure type connection
High-strength bolt connection is through the great tighten pretension bolt rod inside the connection plate plate clamping piece, enough to produce a lot of friction, so as to improve the integrity and stiffness of connection, when the shear, in accordance with the requirements for the design and ...Read more -
Several steps of bolt plating process
Usually, the bolt head is formed by cold heading plastic processing, compared with cutting processing, the metal fiber (metal wire) along the shape of the product is continuous, without cutting in the middle, which improves the strength of the product, especially the excellent mechanical properti...Read more -
The reason of failure in gear bucket operation
Force analysis bucket tooth working face and the excavated object contact, in a complete excavation process in different working stages of its different stress conditions.When the tooth tip first touches the material surface, the bucket tooth tip is impacted strongly due to its fast speed.If the ...Read more -
Bolt performance rating
Bolt performance grade, namely the bolt performance grade for steel structure connection, is divided into more than 10 grades, such as 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, etc.Bolt performance grade label consists of two parts, which respectively represent the nominal tensile strength v...Read more -
Detailed explain about the occlusion system of excavator bucket tooth
The occlusion system, which used for excavator bucket tooth, especially of the occlusion system, which needs take advantage of one over switch part and one tooth part to connection forming into a teeth specification occlusion system, professional liebherr excavator lock pins production supplier s...Read more