Definition and Function of Rail Clamp Fastening System
Definition: Rail Clamp Fastening System is a mechanical equipment for compressing and fixing railway rails. We also call it a welded rail clamp, fixing device, or steel beam rail clamp.
Function: Its main role is to prevent railway vehicles from derailing due to forces like mass force, inertial force, and centrifugal force. This ensures the safety and stability of railway transportation. It also ensures the stability and safety of the track and helps maintain the straightness and levelness of the track.
Structural Composition of Rail Clamp Fastening System
Rail Clamp Fastening System generally consists of components such as a base, upper cover, pin, and spring washer. These parts work together to firmly fix the rail.
Material Classification of Rail Clamp Fastening System
Semi-cast steel: We make the upper cover from ductile iron and the base from cast steel.
Fully cast steel: We make both the upper cover and base from cast steel, typically ZG270-500, to comply with 5676-85. We use lost-wax precision casting with Grade II accuracy, and ensure size deviation meets JZ67-2 Grade II. We machine bolts and nuts from Q235BF steel, with properties complying with GB700-88.Bolts have a surface accuracy of 12.5, and nuts follow GB6170-86. Flat washers are Q235AF steel per GB97.1-85, while spring washers are 65Mn/60Si2Mn steel complying with GB93-87.
Model Specifications
We divide the Rail Clamp Fastening System into WJK, SWJK, and HWJK series, including specific models like TG38, TG43, TG50, TG60, QU70, QU80, QU100, and QU120. Different models are suitable for rails of various types and specifications.
Installation Method
We usually weld the Rail Clamp Fastening System to I-beam steel and sometimes use it on steel plates embedded in concrete. During installation, we must ensure the rail clamp device fixes firmly to the rail to prevent loosening or detachment.
Advantages of Rail Clamp Fastening System
Improves construction efficiency: It can quickly and accurately compress and fix the rail on the sleeper, saving construction time and labor costs.
Ensures construction quality: It features stable pressure and uniform compression, ensuring the straightness and levelness of the track.
Reduces human injury: Using rail clamp devices can reduce workers’ labor intensity and safety risks, lowering the probability of human injury.
Strong versatility: It can be used not only for track laying and maintenance but also for track inspection and replacement.
Wide application range: It is suitable for various track construction and maintenance work, including high-speed railways, urban rail transit, and other track projects.
Application Fields
Rail Clamp Fastening System are widely used in railway construction. Especially in high-speed railway construction, the “welded rail clamp device” pressing construction method is an economical and efficient approach. They are also applied in various places where rails need to be fixed, such as crane rails, mine rails, and factory tracks.
Advantages
How to Find a Qualified Rail Fastener Manufacturer?
Please choose LTRF.
Why Choose LTRF?
- Strong Technical Expertise
LTRF boasts a dedicated R&D center. Moreover, it maintains long-term collaborations with major industry players such as China Railway, CRCC, and the Academy of Railway Sciences. In addition, it also partners with leading railway universities. As a result, LTRF has been able to develop various innovative fastening systems for both domestic and international markets. Notably, all these systems possess independent intellectual property rights. Indeed, to date, LTRF holds over 30 invention and utility model patents.

- Professional Manufacturing
LTRF always aims for the best. We carefully choose the materials we use and make sure every part is made with great care and skill. And we believe in doing things perfectly, so we keep coming up with new ideas and check the quality of our products very carefully to make sure they’re good.
We work fast to make sure you get your order on time. And we offer good service before and after you buy something. At LTRF, we also focus on what our customers need. We’re committed to making good products and providing great service in everything we do.


LTRF control the cost of each process, and the finance department updates the cost calculation regularly.
Furthermore, LTRF’s advanced testing equipment endows the company with comprehensive quality inspection capabilities for the entire fastener system. This meticulous quality-control measure is crucial for ensuring product reliability. Importantly, LTRF holds ISO and CRCC certification for railway products. These certifications not only demonstrate the company’s compliance with international and industry-specific standards but also enhance its credibility in the market.

