The difference between high strength fishtail bolt and common fishtail bolt.

Fishtail bolt is a common railway accessory and plays a very important role in the whole railway line.  Of course, fishtail bolts are divided into different types. Common fishtail bolts and high-strength fishtail bolts are more common.  Since many customers do not know much about fishtail bolts, they also do not know how to buy fishtail bolts.  Let's introduce the difference between the two. fishtail bolt suppliers

1. Compared with the stress characteristics, the high-strength fishtail bolt has the characteristics of pre-tightening and friction transfer of external force.  The shear force of common fishtail bolt connection is transmitted by the shear strength 

of bolt rod and the pressure of hole wall.  When tightening the nut, the pre-tightening force is very small and its influence can be ignored.  The high-strength fishtail bolt not only has higher material strength, but also exerts a great pre-tightening force on the bolt, causing extrusion force between connecting pieces, causing the bolt to generate greater friction force in the direction perpendicular to the screw. The pre-tightening force, anti-sliding coefficient and steel type directly affect the bearing capacity of the bearing high-strength fishtail bolt. fishtail bolt suppliers

2. From the comparison of usage, common fishtail bolts can be reused, while high-strength fishtail bolts cannot be reused.  High strength bolts are usually used for permanent connections.  High strength fishtail bolt is a kind of prestressed bolt.  The friction type uses a torque wrench to apply the specified prestress while the pressure type unscrews the ring head.  Common fishtail bolts have poor shear resistance and can be used in secondary structures.  Ordinary fishtail bolts only need to be tightened. fishtail bolt suppliers

Generally speaking, high-strength fishtail bolt connection has the advantages of simple structure, good mechanical properties, removable and replaceable, anti-fatigue, no looseness under dynamic load, etc. It is a very promising connection method.  The high-strength fishtail bolt uses a special wrench to tighten the nut, so that the bolt produces a huge and controllable pre-tightening force.  Through the nut and the bottom plate, the same pre-tightening force is generated on the connecting parts. fishtail bolt suppliers

The above is the difference between high-strength fishtail bolts and common fishtail bolts. I hope you can choose suitable fishtail bolts according to your needs when purchasing fishtail bolts.

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