
NGM-6.3 Internal Combustion Rail Grinding Machine
The NGM-6.3 rail grinder delivers precise rail head shaping for high-speed track maintenance. Powered by a 6.3 kW gasoline engine, it offers stable performance even under continuous field operation, making it reliable for rail weld finishing and track leveling tasks.
Its robust yet compact frame allows rapid deployment on-site and easy handling for rails ranging from 43 to 75 kg/m. The machine supports longitudinal grinding, edge rounding, and weld seam smoothing, ensuring rails maintain an accurate profile and safe train operation.
Applications: Rail welding joint finishing, rail head profiling, wave abrasion correction, and high-speed track maintenance operations.
Structure and Working Principle
Structure: The NGM-6.3 comprises a reinforced frame, guide wheels, precision rollers, a gasoline engine, feed mechanism, grinding head, and ergonomic control handle.
Working Principle: The engine drives a transmission shaft that rotates the grinding head. Operators adjust the feed rate via a handwheel and move the machine along the rail for uniform grinding. The frame can rotate up to 90° for edge and corner polishing, ensuring an even rail head profile with minimal deviation.
Product Specification
| Engine Power | ≥ 6.3 kW | 4-stroke gasoline engine |
| Rotation Speed | 3600–4200 rpm | Stable under continuous operation |
| Grinding Feed Accuracy | 0.05 mm | Precision control for uniform profile |
| Total Feed Range | 44 mm | Suitable for various rail profiles |
| Track Width | 1049 mm | Standard gauge compatibility |
| Operating Temperature | -40°C ~ +70°C | All-weather field readiness |
| Weight | ≤ 79 kg | Portable for on-site use |
Application
The NGM-6.3 rail grinding machine is engineered for precision rail maintenance, including weld seam finishing, rail head reshaping, and high-speed track polishing. It ensures smooth transitions at welded joints, improving ride quality and reducing wear on rolling stock.
Suitable for 43–75 kg/m rails, the machine also performs on ultra-long continuous tracks and turnout zones, delivering consistent rail head profiles across varying track conditions.

Operation and Maintenance
After each shift, operators should clean exposed guide bars, chains, and sliding surfaces. Lubricate moving parts to maintain smooth operation and reduce wear.
Grease external lubrication cups every 20 hours of operation to ensure continuous and efficient performance.
Customization & Certification
Customization Options: Choose engine type (gasoline or electric), grinding wheel composition, paint color, and custom branding to fit project requirements.
Certification: ISO 9001 quality management system, CE certified for international shipping, and compliant with industrial safety standards.
Transport Packaging and After-Sales
Packing: Heavy-duty wooden crates or pallets to safeguard units during transit.
Delivery: Typical lead time 10–15 working days after confirmation of payment.
After-sales Service: Remote technical support, spare parts availability, and operation guidance provided to ensure customer satisfaction.




Company Information
Our manufacturing facility, located in Zhengzhou High-Tech Industrial Development Zone, spans 20,000 m² with advanced workshops and assembly lines. We specialize in rail grinding, tamping, lifting, and welding machines, with export experience to over 40 countries worldwide.



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