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How to quickly distinguish the size of bolts and nuts
The student should be used to holding the caliper.5 are M5 screws or screws. The caliper diameter is greater than 4 and less than 5, which is slightly less than 5. This is the most basic one.Nut is nut and bolt or screw fastening screw together to the function of parts, all production machinery m...Read more -
Only with good quality can we have good sales
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...Read more -
material 40cr
40Cr is the GB standard steel number in China, and 40Cr steel is one of the most widely used steel in mechanical manufacturing industry.It has good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity.Good steel hardenability, when water quench hard...Read more -
Installation of bucket teeth of excavator
When the addon teeth are inside and outside, use the big pin stick to fix the inner teeth When installing the bucket teeth of the excavator, first insert the bucket teeth installation department into the bucket teeth cavity, and ensure that the top of the bucket teeth installation department and ...Read more -
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