Axle-Hung Housing – A Critical Part of Railway Locomotive Components

The Axle-Hung Housing, also known as axle box housing, is one of the core components of a locomotive’s traction system. Mounted directly on the axle, it supports the traction motor, protects key internal parts, and ensures stable power transmission to the wheels. As a critical railway part, it must withstand heavy loads, continuous vibration, and harsh operating conditions—making its strength and precision essential to locomotive performance and long-term reliability.

1. Core Functions: Three Indispensable Missions of Axle-Hung Housing

1.1 The Anchor Point for Power

As the rigid support for the traction motor, it directly transmits the massive torque generated by the motor to the axle, converting it into the locomotive’s tractive effort. It is the strongest link in the power transmission chain.

1.2 The Guardian of Precision

Its structural rigidity firmly locks the meshing position between the motor pinion and the axle gear. This pinpoint accuracy is crucial for smooth, quiet, and efficient transmission, significantly extending the service life of the entire gearing system.

1.3 The Protective Shell for the System

It forms a robust, enclosed space, shielding internal bearings and gears from external contaminants like mud and dust. This ensures the lubrication system works continuously and effectively, laying the foundation for the drive system’s long life and low maintenance.

2.   Product Features: How We Deliver Superior Performance for Axle-Hung Housing

2.1 Exceptional Load-Bearing Capacity

Manufactured from high-strength alloy cast steel and subjected to rigorous ultrasonic testing, our housing can easily handle the immense shock and dynamic loads from traction and braking. This robust construction prevents fatigue cracks, ensuring operational safety.

2.2 Uncompromising Operational Precision

Critical areas like the bearing bores are machined on large CNC equipment to micron-level tolerances. This guarantees perfect gear alignment, drastically reducing vibration and noise while enhancing overall performance.

2.3 A Reliable Sealing Defense System

We employ a multi-stage sealing design (utilizing materials like FKM seals) combined with smooth internal surfaces to create a highly effective sealed environment. This prevents oil leaks and blocks contaminants, protecting the core components.

2.4 Efficient Thermal Management

The scientific design of the housing structure and well-planned internal oil passages ensure that heat is distributed evenly and dissipated effectively during continuous high-load operation. This prevents dangerous local hot spots, keeping the system within a safe temperature range.

3.   The Source of Excellence: Total Control from Material to Finished Product

3.1 Material Selection:

The main body is made from premium railway castings like ZG25MnCrNiMo high-strength cast steel or QT600-3 ductile iron. These are not ordinary metals; they are specifically developed for heavy-duty applications, offering an optimal combination of high strength, toughness, and superior fatigue resistance.

3.2 Manufacturing Journey:

The transformation from a raw casting to a precision component is a meticulous journey.

Casting → Heat Treatment (Stress Relieving) → CNC Precision Machining → Benchwork & Finishing → Cleaning & Anti-Corrosion → Bearing Press-Fitting → Seal Assembly → Final Inspection.

The CNC precision machining stage is the core of this process, breathing life into the railway casting and ensuring every mounting surface is perfectly accurate.

3.3 Quality Assurance & Inspection:

We operate on the principle that “quality is built-in through design and manufacturing, and verified through inspection.”

Our integrated inspection protocol includes: Raw Material UT/MT Inspection → 100% Dimensional Checks During Machining → Final Full-Dimensional Verification on a CMM → Cleanliness Checks → Rotation Flexibility Tests.

We deliver not just a product, but a traceable and trustworthy certificate of quality.

4. Our Commitment to Your Operation

We understand that the reliability of your Axle-Hung Housing directly impacts your locomotive’s availability and operating costs. Therefore, we focus on casting and machining, every unit into a durable asset that stands the test of time.

If you are looking for a partnership that enhances the reliability and longevity of your locomotive’s drive system, our Axle-Hung Housing solution is precisely what you need.

5. Package

Polybag+Carton box+Wooden case/Plywood case/Pallet, according to customer’s request

6. Company Profile

Luoyang Fonyo Heavy Industries Co., Ltd. was founded in 1998 . Over the years, Fonyo has been recognized multiple times as the Luoyang Engineering Technology Center, Luoyang Technology R&D Center, and a National High-tech Enterprise.

Luoyang Fonyo Heavy Industries specializes in custom railway castings, offering OEM & ODM production according to your drawings or samples. We supply large iron and steel castings for railway, mining, and heavy machinery industries.

FAQs

Q1: Are you a manufacturer or a trading company?

A: We are a manufacturer. Established in 1998, our company has nearly 30 years of experience in the casting industry. We cover a total area of 72,600 ㎡, including 51,000 ㎡ of workshop space.

Q2: What are your main products?

A: We specialize in steel castings, iron castings, precision machining, and component assembly. Our products are widely used in locomotives, railcars, high-speed trains, mining equipment, wind power equipment, and other industrial sectors.

Q3: What casting precision can you achieve?

A: We offer multiple casting processes to meet different precision requirements. All production strictly complies with ISO 9001, ISO 14001, ISO 45001, EN 15085, and IRIS standards.

Q4: Can you produce according to samples or technical drawings?

A: Yes. We can manufacture based on your samples or drawings. If needed, we can also create detailed drawings after inspecting your samples.

Q5: How do you perform quality control before delivery?

A: Quality control is essential to ensure reliable casting performance. We conduct three stages of inspection throughout production and provide full documentation before delivery, including material test reports, dimensional inspection reports, and mechanical properties test reports.

If you are interested in our products or services, please feel free to contact us.