High-Strength Friction Grip Bolts and Ordinary Bolts

Author: Melody Liu

Dec. 02, 2024

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High-Strength Friction Grip Bolts and Ordinary Bolts

Bolts are ubiquitous in construction and engineering, serving as crucial components in securing structures and machinery. Within this realm, high-strength friction grip bolts stand out as a specialized category of fasteners known for their exceptional durability and reliability. It is imperative to distinguish between high-strength friction grip bolts and ordinary bolts to ensure optimal usage in diverse applications. This article delves into the nuances that set high-strength friction grip bolts apart from ordinary bolts, shedding light on their material composition, strength characteristics, tightening methods, and application scenarios.

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What are High-Strength Friction Grip Bolts and Ordinary Bolts

What are High-strength Friction Grip Bolts

High-strength friction grip bolts (HSFG bolts) are a type of bolt that is designed to provide a high-strength connection between two or more steel plates. HSFG bolts are made from high-strength steel and are tightened to a specific pre-tension load. This pre-tension load creates a clamping force between the plates, which prevents them from slipping past each other.

What are Ordinary Bolts

Ordinary bolts are a type of bolt that is used for general-purpose applications. Ordinary bolts are typically made from lower-strength steel than HSFG bolts and are not tightened to a specific pre-tension load.

Why is it Important to Understand the Differences Between High-strength Friction Grip Bolts and Ordinary Bolts?

It is important to understand the differences between high-strength bolts and ordinary bolts because they are designed for different applications. HSFG bolts are designed for high-strength applications, such as bridges, buildings, and heavy machinery. Ordinary bolts are designed for general-purpose applications, where high strength is not required.

Differences Between High-strength Friction Grip Bolts and Ordinary Bolts: A Comprehensive Comparison

High-strength friction grip (HSFG) bolts and ordinary bolts are two types of fasteners that are used in a wide variety of applications. HSFG bolts are designed for high-strength and reliability applications, while ordinary bolts are used for general applications where high strength is not required.

The following table summarizes the key differences between HSFG bolts and ordinary bolts:

CharacteristicHSFG boltsOrdinary boltsMaterialHigh-strength steel alloys (e.g., 45# steel, 20MnTiB steel, 35CrMoA steel)Lower-strength steel alloys (e.g., Q235 steel)StrengthTensile strength: MPa Shear strength: 730 MPaTensile strength: 480 MPa Shear strength: 320 MPaTightening methodMust be tightened to a specific pre-tension load using a torque wrenchCan be tightened using a wrench or socket wrenchApplicationsHigh-strength and reliability applications (e.g., bridges, buildings, heavy machinery, aircraft, ships)General applications where high strength is not required (e.g., furniture, appliances, electronic devices, general construction)

Detail Applications of HSFG Bolts and Ordinary Bolts

HSFG bolts are used in a wide range of applications where high strength and reliability are required. Some of the most common applications include:

  • Bridges: HSFG bolts are used to connect the various structural members of bridges, such as the beams, girders, and trusses. The high strength of HSFG bolts is essential for ensuring that bridges can safely carry the heavy loads that they are subjected to.
  • Buildings: HSFG bolts are used to connect the structural members of steel-framed buildings, such as the columns, beams, and floors. The high strength and reliability of HSFG bolts are essential for ensuring that buildings can safely withstand the loads imposed by wind, earthquakes, and other hazards.
  • Heavy machinery: HSFG bolts are used to connect the various components of heavy machinery, such as cranes, excavators, and bulldozers. The high strength of HSFG bolts is essential for ensuring that heavy machinery can safely lift and move heavy objects.
  • Aircraft: HSFG bolts are used to connect the various components of aircraft, such as the wings, fuselage, and engine. The high strength and reliability of HSFG bolts are essential for ensuring that aircraft can safely fly and carry passengers and cargo.
  • Ships: HSFG bolts are used to connect the various structural members of ships, such as the hull, decks, and superstructure. The high strength of HSFG bolts is essential for ensuring that ships can safely withstand the forces of the ocean.

Ordinary bolts are used in a wide variety of general applications where high strength is not required. Some common applications include:

  • Furniture: Ordinary bolts are used to assemble furniture, such as chairs, tables, and beds. The strength of ordinary bolts is sufficient for these applications, and they are also relatively inexpensive and easy to use.
  • Appliances: Ordinary bolts are used to assemble appliances, such as refrigerators, washing machines, and dishwashers. The strength of ordinary bolts is sufficient for these applications, and they are also relatively inexpensive and easy to use.
  • Electronic devices: Ordinary bolts are used to assemble electronic devices, such as computers, televisions, and smartphones. The strength of ordinary bolts is sufficient for these applications, and they are also relatively small and lightweight, which is important for electronic devices.
  • General construction: Ordinary bolts are used in a wide variety of general construction applications, such as framing houses, building decks, and installing fences. The strength of ordinary bolts is sufficient for these applications, and they are also relatively inexpensive and easy to use.

Conclusion

In summary, high-strength friction grip bolts stand as exemplars of engineering precision and durability. Their composition of high-strength materials, superior strength characteristics, and precise tightening methods set them apart from ordinary bolts. This differentiation makes them indispensable in projects where structural reliability is of paramount importance. Understanding the nuances between high-strength friction grip bolts and ordinary bolts is crucial in ensuring the safety and longevity of structures and machinery. As we continue to push the boundaries of engineering, the reliance on specialized fasteners like high-strength friction grip bolts will undoubtedly become even more pronounced, further underscoring their significance in the world of construction and engineering.

Related Products

High Strength Friction Grip Bolts can be used for (i) Slip ...

Concept:

A bolt is a metal pin at one end and shank at the other end which is threaded to receive a nut.

For more information, please visit Friction Bolt.

Various types of bolts are:

1) High strength bolt

2) Turned bolts (close Tolerance bolts)

3) Ordinary bolts.

High strength bolts: 

  • The bolts that are tightened to develop some initial tension are known as high strength 

    friction

     grip bolts. The bolts are tightened until they have very high tensile stresses so that the connected parts are tightly clamped together between bolt head and nut.
  • Friction develop between the plate surfaces subjected to clamping forces and thus in 

    HSFG bolts

     (High Strength Friction Grip Bolts) load is primarily transferred through 

    friction.

  • Such connections are called 

    no-slip connection

     or slip-critical connection. The induced 

    initial tension

     is called the 

    proof load

    If you are looking for more details, kindly visit Mesh Bolt.

    .
  • These are used in bridges or where stress reversal may occur.

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