Rail Profile Grinder Internal Combustion Type NMG-4.9

Category： Track Maintenance Equipment
Model:NMG-4.9
Fuel Consumption: About 1.6L/h
Power:4KW
Grinding Wheel Inclination Angle: 0~90°
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Rail Profile Grinder Internal Combustion Type NMG-4.9

1. Brief introduction

The Rail Profile Grinder (also known as Precision Grinder) is a small-sized professional internal combustion tool, specifically designed for profiling grinding of rail heads after rail welding and rail damage repair welding. As a high-performance Rail Profile Grinder, it is suitable for grinding operations of various types of rails (43-75kg/m) in both base and on-site environments after welding and rail head repair welding. Equipped with additional auxiliary devices, this Rail Profile Grinder can also perform flat grinding and wave wear grinding, making it an ideal tool for ultra-long seamless track laying, rail break repair and stress relief.

As a reliable Rail Profile Grinder, it features reasonable design, compact structure, flexible operation and easy on/off track movement. This Rail Profile Grinder is equipped with an imported gasoline engine, which ensures low failure rate, reliable performance and strong adaptability to field operations. After profiling grinding by this Rail Profile Grinder, the rail is not only smooth, but also restores its original rail head contour, effectively improving the stability and safety of train operation.

2. Technical parameters of rail profile grinder

Item	Specification
Product Name	Rail Profile Grinder (Internal Combustion Type)
Product Abbreviation	Precision Grinder
Model	NMG-4.9
Fuel Tank Capacity	1.8L
Fuel Consumption	About 1.6L/h
Power Type	4KW Honda GXV160 Engine
Grinding Head Speed	4000r/min
Grinding Wheel Specification	Φ150×Φ55×70
Grinding Wheel Stroke	60mm
Grinding Wheel Inclination Angle	0~90°
Feed per Rotation of Feed Handwheel	1.35mm
Total Machine Weight	75kg
Overall Dimensions	1480mm×500mm×800mm
Allowable Linear Speed of Grinding Wheel	50m/s

3. Working Principle of Rail Profile Grinder

When the Rail Profile Grinder is in grinding operation, the gasoline engine drives the transmission shaft to rotate, and the grinding head is driven to rotate at high speed through the transmission device. In the grinding process of the Rail Profile Grinder, turn the feed handwheel of the grinding head to adjust the feed amount, operate the handle to push the Rail Profile Grinder to move longitudinally along the rail to grind the rail tread; at the same time, rotate the frame within the range of 0~90° to grind the rail head fillet and the working edge of the rail. With the joint action of horizontal rollers and guide wheels, the profiling grinding operation of the rail head by the Rail Profile Grinder is completed.

4. Oil Specifications for Rail Profile Grinder

Type	Requirement
Gasoline Engine Fuel	Pure 92# Gasoline (No mixing of other oils)
Lubricating Grease	Kluberlub BE 41-1501 or General Lithium-based Lubricating Grease

5. Operating Procedures for Rail Profile Grinder

Operation Stage	Specific Requirements
Before Use	1. Fully check the settings of all parts of the Rail Profile Grinder before operation. 2. Do not remove the grinding wheel guard. 3. Protect the grinding wheel from damage and moisture. 4. Confirm that the grinding wheel and grinding wheel guard are installed in the correct position. 5. The allowable linear speed of the grinding wheel used by the machine shall be 50m/s. 6. The grinding wheel can be adjusted manually or by electric control switch, and the height of the grinding wheel can be adjusted up and down. When adjusting with the handwheel, the feed amount of the grinding wheel is 1mm per revolution of the handwheel.
During Use	1. After starting the engine, set the grinding wheel to the required grinding depth through the electric control switch (adjust according to the conditions near the rail in most cases). After adjusting the depth, lock the depth lock nut to prevent loosening during grinding, resulting in excessive grinding. 2. Now raise the grinding wheel until it reaches the highest convex point of the rail. 3. When the Rail Profile Grinder grinds back and forth near the grinding point, use the manual adjustment switch to control the feed amount of the grinding wheel, and the digital display will show the grinding depth value of the grinding wheel in real time. 4. The weight of the Rail Profile Grinder itself is suitable for the pressure required for grinding. 5. When grinding the two sides of the rail, the grinding wheel is automatically pressed against the rail under the action of the spring to ensure the grinding pressure required during grinding. 6. The deflection of the Rail Profile Grinder is adjusted by the frame deflection handwheel.
Shutdown	1. Before shutting down the Rail Profile Grinder, first lift the grinding wheel to a height of more than 3mm above the rail surface. 2. Turn off the Rail Profile Grinder and prevent personnel unfamiliar with the machine from operating it.