Carbon Steel Dacromet Eccentric Screws For Metal Joints

Product introduction

Dacromet eccentric screws, also known as sheet metal screws with holes, are fasteners with exquisite design and excellent functions. Its core features are the eccentric design at the end of the screw shaft and the pre-welded high-strength metal sheet with precise mounting holes punched into it. This product is specially designed for installation scenarios that require a wide range of infinitely adjustable positions. During installation, after fixing the basic screws, by rotating the screw shaft, the metal piece on the top of the eccentric wheel can be driven to cause a plane circular motion, thereby achieving smooth and precise displacement adjustment of the installation hole in the radial direction. This feature perfectly solves the problem of hole misalignment caused by processing or installation errors. The products are widely used in automobile manufacturing, mechanical equipment, steel structure connection and various sheet metal parts assembly fields. Its advantage lies in simplifying the installation process, improving assembly efficiency and accuracy, and effectively absorbing tolerances to ensure the stability and reliability of the connection structure. It is an indispensable and efficient adjustment and fastening solution in modern industrial assembly.

 

Product features

1. Precise radial adjustment capability

Its core feature is the eccentric structure at the end of the rod. By rotating the screw, the metal sheet with holes can be driven to produce plane circular motion, achieving smooth, stepless and precise fine-tuning of the mounting holes in the radial direction, effectively compensating for installation errors.

 

2. Excellent anti-loosening and shock resistance

The eccentric wheel is tightly wedged with the surface of the workpiece, generating strong friction and forming a reliable mechanical self-locking effect. It can still maintain pre-tightening force under severe working conditions such as vibration and impact, effectively preventing screw loosening.

 

3. Excellent anti-corrosion durability

The "Dacromet" coating provides it with extremely high anti-corrosion properties. This coating has no hydrogen embrittlement, is resistant to chemical corrosion and high temperature, and is evenly covered. It can completely protect even grooves and complex structures, and its service life is far longer than that of ordinary electroplating.

 

4. Convenient installation and efficiency

Prefabricated metal sheets with holes serve as installation guides, simplifying the positioning process. The two functions of tightening and position adjustment can be completed simultaneously with one tightening, greatly improving assembly efficiency and reducing labor and debugging costs.

 

5. High structural strength and reliability

The whole body is made of high-strength steel and heat-treated to ensure the mechanical strength of the screw itself. The eccentric locking mechanism makes the load distribution more even, the connection is stable and reliable, and the safety is high.

 

Product application

1. Automobile industry and transportation

It is widely used in the hinge installation of automobile doors, hoods, and trunk lids to achieve precise gap adjustment between the door and the body to ensure sealing and beauty. It is also commonly used in the connection and adjustment of skins, brackets and internal components of passenger cars, trucks and rail transit vehicles, effectively absorbing manufacturing tolerances.

 

2. Mechanical equipment and machine tool manufacturing

Used for the installation of machine tool protective covers, operation panels, electrical cabinets and other accessories. It can easily compensate for accumulated errors in sheet metal processing and assembly, achieve fast and precise alignment and fixation, and improve the overall assembly quality and efficiency of the equipment.

 

3. Building curtain walls and metal structures

In the installation of building curtain walls, steel structure connection points, and aluminum alloy doors and windows, it can effectively adjust and absorb displacements caused by foundation settlement, thermal expansion and contraction, or installation deviations, ensuring safe and reliable connections. At the same time, its Dacromet coating can long-term resist corrosion in the outdoor environment.

 

4. Home appliances and chassis cabinet industry

It is often used for the installation of shells and internal brackets of high-end home appliances (such as ovens and refrigerators), as well as covers, guide rails and other components of network cabinets and server cases. It provides an efficient fastening solution where space is limited and fine adjustments are required.

 

FAQ

Q: What are the core advantages of this screw?

A: Its core advantage is the three-in-one function of “adjustment, locking, and anti-corrosion”. It can realize radial stepless adjustment to compensate for tolerances, produce mechanical self-locking and anti-loosening through the eccentric structure, and provide strong anti-corrosion capabilities with Dacromet coating.

 

Q: Why choose Dacromet coating instead of ordinary electroplating (such as galvanizing)?

A: Dacromet coating has the advantages of no hydrogen embrittlement, high corrosion resistance (salt spray test time is much longer than that of galvanizing), uniform coating without dead corners, and high temperature resistance. It is especially suitable for harsh environments with high anti-corrosion requirements such as automobiles and outdoors, and can avoid the risk of hydrogen embrittlement fracture that may occur during electroplating of high-strength steel.

 

Q: Can the metal piece with holes be replaced if it is damaged?

A: No. The metal piece is a one-piece structure welded or riveted to the screw shank to ensure strength. If the mounting hole in the metal plate is damaged, the entire screw will need to be replaced.

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