GMC-12Ⅱ Rail Grinding Vehicle

GMC-12Ⅱ Rail Grinding Vehicle

Rail grinding vehicle, also known as rail grinder, while multi-section integrated units are called rail grinding trains. We have developed GMC-12Ⅱ, a medium-duty rail grinding vehicle, to efficiently remove rail defects, re-profile rails and optimize wheel-rail contact. It reduces resource waste when large grinders process corrugated curved rails and solves the low efficiency problem of small grinding machinery. The control system is equipped with an EAC200 motion controller, which supports the "8+N" grinding mode, achieves stepless travel speed control and enables intelligent grinding operation management. The grinding angle can be rapidly adjusted while the vehicle is traveling, thus meeting grinding requirements across diverse working conditions. To be mentioned, our rail grinding vehicles have been granted utility model patents. Please contact us for any procurement requirements.

GMC-12Ⅱ Rail Grinding Vehicle Technical Parameters

GMC-12Ⅱ Rail Grinding Vehicle Product Highlights

1. Self-propelled design for autonomous grinding operations

2. Automatic three-dimensional positioning capability

3. Capability for simultaneous rail grinding on both sides

4. Multiple pre-programmed grinding modes built into the system

5.. Adjustable parameter compensation function

6. Rapid fault diagnosis with real-time alarm prompts

GMC-12Ⅱ Rail Grinding Vehicle Operating Performance 

1. Eliminate corrugation on rail treads

2. Remove excess metal flash from rail gauge corners

3. Rectify weld depression defects

4. Repair rail surface abrasion damage

5. Remove fish-scale wear defects on rail treads

GMC-12Ⅱ Rail Grinding Vehicle Advantages

The working assembly is composed of rollers, guide rails, trapezoidal lead screws, servo motors, grinding motors and abrasive wheels. It is equipped with 12 grinding arms supporting automatic vertical, lateral and rotational control, enabling auto-position grinding to eliminate rail head defects such as corrugation and gauge flash and restore the standard rail head profile.

Grinding Performance and Operation Efficiency of GMC-12Ⅱ Rail Grinding Vehicle

1. Corrugation Trimming:

When 2-mm-deep corrugation appears on rail running treads, the GMC-12-II rail grinder can complete full simultaneous double-rail grinding over 500 meters of track within three maintenance windows. After grinding, the residual corrugation depth is controlled to below 0.3 mm to improve rail surface smoothness and guarantee steady train travel.

The 400-meter-radius curve at K517 of the Binzhou Up Line originally needed rail replacement every four months. Since we applied the GMC-12-II rail grinder for grinding work, its rail replacement interval has been prolonged to 18 months, saving 720,000 RMB in operating costs every year.

2. Rail Fat Edge Trimming:

The GMC-12 II rail grinder can fully eliminate 3-mm-thick excess flanges on switch rails after just 2 to 3 grinding passes, and complete flange trimming for two turnout sets within a single maintenance window. 

This comparison picture shows the turnout rail flange condition at Wuhan Bridge Track Depot before and after grinding with our GMC-12II rail grinding machine. The left side displays the original worn rail flange with severe side wear defects. After precise grinding treatment by our rail grinder (right side), the rail side edge becomes smooth, the abnormal wear is fully eliminated, and the standard rail profile is restored effectively. Regular rail flange grinding can extend rail service life and ensure stable, safe train operation on turnouts and lines.

3. Rail Profile Trimming:

It previously took 3 vertical grinders and 5 maintenance windows to complete profile trimming for one turnout. Our rail grinder finishes this turnout profile trimming task in only one maintenance window, delivering a 15-fold increase in grinding efficiency. We also conducted follow-up inspections on the turnout at Yalu Station one year after grinding. Its profile contact band was centered and measured 25–35 mm in width, which delivered optimal wheel-rail coupling and greatly reduced train lateral sway.

The rail surface stays smooth without severe side wear or corrugation after long-term operation. Regular grinding with our machine effectively extends rail service life and cuts long-term track maintenance costs. It fully adapts to tight curves, turnouts and marshalling yards to satisfy all daily rail repair demands.

Successful Cases of Rail Grinding 

Our GMC-12II rail grinding vehicle has been widely put into operation across multiple China Railway Groups since 2021. It has completed track maintenance work in Wuhan, Xi’an and Harbin railway bureaus, covering marshalling yards, turnouts and tight curves with a minimum radius of 300m. The equipment can remove rail defects including rail head side wear, corrugation and shelling, performing both corrective and preventive grinding. Nine track maintenance depots under Harbin Railway Bureau have fully adopted this model. Compared with large heavy grinding trains, it reduces resource consumption on curved track grinding, while solving the low-productivity issue of small portable grinders.

Matching Explosion-proof Grinding Wheels for GMC-12II

We supply special variable-diameter explosion-proof grinding wheels exclusively for the GMC-12II rail grinding Vehicle. They are custom-made to perfectly fit this grinder and adopt a reinforced explosion-proof construction for safe long-hour rail grinding work. They offer stable cutting performance for eliminating rail side wear, corrugation and shelling at marshalling yards, tight curves and turnouts, and can be purchased separately to support your daily track maintenance work. 

Grinding Wheels for Railway Rail and Turnout Maintenance

We specialize in the research, development, production and sales of abrasive products, including grinding wheels for railway rails and turnouts. Customized solutions are available to fully meet your specific requirements.

Why Choose Our GMC Series Rail Grinding Vehicles

Our GMC series rail grinding vehicles offer excellent cost-effectiveness with competitive pricing. They are ideal for rail grinding service contractors and railway operators managing track mileage of less than 200 km, and support grinding operations on meter-gauge tracks. The full set of design drawings for our special meter-gauge grinding model has been finalized. 

This series has been exported in bulk to Mexico, Russia, Southeast Asia and other regions. Compared with equivalent high-end products from top European and American manufacturers, our units cost merely 20%–50% of their selling price. All core machine components are sourced from world-renowned brands. Please feel free to contact us if you have any inquiries or requirements.