Kingrail railway bogie outer springs are key elastic components used in the primary or secondary suspension system of railway rolling stock. They are designed to support vehicle load, absorb dynamic impact, reduce vibration transmission, and maintain stable running performance under long-term railway operation.

The outer spring is commonly installed together with an inner spring to form a combined suspension spring group. This structure helps improve load distribution, enhance fatigue resistance, and ensure reliable suspension performance for locomotives, freight wagons, passenger coaches, metro cars, and other rail vehicles.

Kingrail manufactures railway outer springs according to customer drawings, samples, and technical specifications. Materials can be selected according to project requirements, including 60Si2CrVA, SUP9A, SUP10, 50CrV4, or equivalent spring steel grades. Through controlled forming, heat treatment, shot peening, surface protection, and dimensional inspection, the spring can achieve stable mechanical performance and long service life.

Key Features:

• Designed for railway bogie suspension systems
• High load-bearing capacity and elastic recovery
• Excellent fatigue resistance under cyclic loading
• Good vibration absorption and impact resistance
• Manufactured according to drawings or samples
• Material and surface treatment can be customized
• Suitable for harsh railway operating environments

Quality Control:

• Material chemical composition inspection
• Dimensional inspection
• Load and deflection testing
• Hardness testing
• Surface quality inspection
• Fatigue performance inspection if required

Typical Applications:

• Freight wagon bogies
• Passenger coach bogies
• Locomotive suspension systems
• Metro and light rail vehicles
• Industrial railway vehicles

Kingrail provides customized railway outer springs for global railway maintenance, rolling stock manufacturing, and spare parts replacement projects.

Welcome to the Kingrail website. We're glad you stopped by and trust you will have a happy tour.

Kingrail is an international company offers diversified range of high-tech products and services and operates globally.

Core business is identified with three divisions:

1. High-end railway components – wheels, axles and wheelsets for high-speed applications, locomotives, passenger trains, trams and underground trains., rail road cars, light rail, street car, ballast vehicles, etc

2. Railway track materials: Tie plates, fishplates, clips, screw spikes, steel rails, etc

3. Forging and casting to drawings, for various applications such as power generation, oil and gas, offshore platforms, cement works, industrial plants, iron and steel production plants or shipbuilding.

Whether you need components or integrated systems, global tracking technology or performance analytics,Kingrail is always here at service for you!

Since 2002, we've been committed to having the world's highest standards in railroad wheel sets. But we don't set the standards; our customers do.

The hard and smart-working employees of Kingrail are dedicated to putting customers first. Over 200,000 squares of manufacturing space. We're armed with modern equipment, progressive production methods, and the confidence that comes with years of experience. We can take on any job. No matter what it is.

With roots deeply embedded in the railroad industry, we've grown to be a world-class supplier of customer satisfaction. From your first contact with us to the delivery of the product, we strive to make it easy for you. Kingrail staff are happy and pride working here because they love and happy for the job, care and happy for all the job they do.

So feel free to put us to the test – with something easy, or better yet, with something impossible. We're ready to show you what we can do.

Maanshan Kingrail Technology Co.,Ltd. is pleased to introduce ourselves as one of the leading manufacturer, stockist and supplies of Railcar spares and Railway Track Materials, Railway equipment, forging and casting metal products!

Equipped with forging lines:3T electro-hydraulic Hammer,2500T Hot Die press,1600T Hot Die press,400T Double plate Friction press,300T Double plate Friction press, Kingrail also equipped with fully machining and inspection equipment, Main machining equipments:CNC Lathes,Painting line,Continuous Heat-treatment Line,well type Furnace,Cutting machine,Robots, Main testing equipments;OES Metals Analyzer,CMM,Universal hydrankic testing machine.

Invest about 8% of the sales volume to be the R&D expenses, Kingrail introduce the world's leading technology combined with international high-tech talent to ensure the stable development of the company,and maintain long-term competitive advantage.

Kingrail have exported products over 50 countries such as US, Canda, UK, South Africa, Kenya, India, etc. Competitve quality and service are spoken highly by worldwide customers!

Kingrail made strict rules on all products, customer service is customer core value! 

Our vision:

* To be best supplier with world-Leading Capacities!

* 100% customer satisfication!

We are not the best now, but we strive to be better and better!