B21, China Town Mall, Midrand
Digital Surfacing Guide Rail Weld Grinder NGM-4.8 Rail Profile Grinding Machine
- Section : Sports & Entertainment
- Category : Vehicle Parts & Accessories
- SKU : 10000014140276
Product Description
Specification
Main Technical Parameters1.Petrol Engine Model： Honda GX200 Speed: ≥3600r/minPower: 4.8kW2. Grinding wheel size: φ125×65×M20 Linear speed: ≥35m/s3. Main shaft speed: 4500r/min4. Tilt angle of grinding wheel: ±90°5. Tilt angle accuracy: 0.5°,1.0°,2.0°, 3.0°,4.0°,5.0° 6.Grinding wheel stroke: 45 mm7.Grinding wheel feeding accuracy: 0.01mm,0.1mm,0.15mm,0.2mm,0.25mm,0.3mm8.Distance between two profiling wheels: 1000mm9.Machine weight: 98kg10.Dimension: 1700×590×750mm
Scope of Application
NGM-4.8 rail grinding machine (Rail Grinder) suitable to 43kg/m-75kg/m rail track welding, uneven connect, rail track fat edge, track end-face welding and repair etc .It has High work efficiency, good quality of grinding, the advantages of simple operation, convenient for move on the track and move out, which is necessary tool for railway project overhaul and emergency maintenance.
1. The machine adopts a MCU controller, which is simple to operate, digital display of feed rate and rotation angle. It has the characteristics of precise control and high grinding accuracy.2. The feed device of the machine is driven by stepping motor. It has the characteristics of digital display of feed, precise control, adjustable feed accuracy and high grinding accuracy.3. The angle control device of the machine is driven by stepping motor. It can adjust rotation precision and digital display rotation angle. It changes the previous manual rotation mode, reduces the labor intensity of workers, and improves the operation efficiency and standardized grinding.4. The whole power supply adopts lifelong maintenance-free power supply, which has the characteristics of lifelong maintenance-free. It has the characteristics of fast charging speed, high discharge capacity of large current, high efficiency of energy conversion, low loss of process, high power density, good ultra-low temperature, long cycle life and no charging memory effect etc.5. The machine has one key reset function. After grinding operation, the feeding device and rotating beams are reset to the initial state. The operation is simple and high efficiency.6. The machine can grind both sides of the rail with 90°, and the inclination angle of the grinding operation is large.7. This machine can do grinding operation in high precision and high efficiency. It has the advantages of good grinding quality, easy operation, and convenient access and so on. It is a necessary tool for railway overhaul, maintenance and emergency repair.
Specification
| item | value |
| Type | rail pad |
| Material | steel |
| Dimensions (L x W x H) (mm) | 1700 * 590 * 750mm |
| Place of Origin | China |
| Liaoning | |
| Brand Name | Tiegong |
| Warranty Period | 1 year |
| power | 4.8kw |
| speed | 4500 r/ min |
| Weight | 98kg |
| Grinding wheel specifications | φ125×65×M20 |
- Shipping Timeframes: All orders are processed within 2-5 business days (excluding weekends and holidays). After your order has been processed, the estimated delivery time is before 03 Feb, 2026, depending on customs, Please note that due to high demand, some items may experience longer shipping times, which will be communicated at order confirmation email.
- Order Processing Time: Please allow 2-5 business days for us to process your order before it is shipped . Orders placed after 16:00 on Fridays, or during weekends and public holidays, will begin processing on the next business day. Processing times may be extended during peak seasons or sales events.
- Manufacturing Time: Some products needs manufacturing time, the manufacturing process will take approximately 10-30 business days depending on the product. This timeframe may vary depending on the complexity of the product and current demand. but this will be communicated with you during order confirmation.
- Returns and Exchanges: We offer a 30-day return policy for most items. If you are not completely satisfied with your purchase, you may return it within 30 days of receipt for a refund or exchange. Items must be unused, in their original packaging, and accompanied by proof of purchase. Return shipping costs are the responsibility of the customer, unless the item was damaged or defective upon arrival.
1. What is the NGM-4.8 Rail Profile Grinding Machine used for?
The NGM-4.8 is a rail profile grinding machine designed for finishing and repairing welded rail joints, correcting uneven rail connections, removing fat edges, dressing track end-faces and other maintenance tasks on 43kg/m–75kg/m rail sections during overhaul and emergency repairs.
2. What power unit does the machine use and what fuels it requires?
The machine is powered by a Honda GX200 petrol engine rated at 4.8 kW with an engine speed ≥3600 r/min. Fuel: regular gasoline appropriate for the Honda GX200 (follow the engine manufacturer's fuel recommendations).
3. What are the grinding wheel specifications and speeds?
Standard grinding wheel size is φ125×65×M20. Main shaft speed is 4500 r/min and the grinding wheel linear peripheral speed is ≥35 m/s. Grinding wheel stroke is 45 mm.
4. What rail sizes and profiles is the NGM-4.8 compatible with?
It is suitable for common heavy rails in the 43 kg/m to 75 kg/m range, covering typical rails used in mainline and industrial track welding and repair.
5. What tilt/rotation range and angle accuracy does the machine offer?
The grinding wheel tilt range is ±90°. Angle control is digital and driven by a stepping motor; available angle accuracy options include 0.5°, 1.0°, 2.0°, 3.0°, 4.0° and 5.0°.
6. How precise is the grinding-wheel feed and how is it controlled?
The feed device is driven by a stepping motor with digital display. Feed accuracy options include 0.01 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm and 0.3 mm, allowing precise and repeatable material removal.
7. What control and display features does the machine have?
The machine uses an MCU controller that digitally displays feed rate and rotation angle. It also provides precise control of feed and angle, and includes a one‑key reset function to return feed and rotation to the initial state after grinding.
8. What powers the control electronics and what are its characteristics?
Control electronics are powered by a lifelong maintenance‑free power source (battery pack) described as having fast charging, high discharge current capacity, high energy conversion efficiency, low loss, good low-temperature performance and long cycle life. For battery specifications and charging procedure, consult the manufacturer.
9. What are the machine's size, weight and mobility on track?
Machine dimensions: 1700 × 590 × 750 mm; weight: 98 kg. It is designed for convenient movement on tracks and for quick deployment and removal. Due to its weight, use appropriate lifting/handling equipment or two trained operators for transport.
10. How often should grinding wheels and consumables be inspected or replaced?
Inspect the grinding wheel before each shift for cracks, excessive wear or imbalance. Replace immediately if damaged. Replacement frequency depends on workload and material removed; keep spare wheels (φ125×65×M20) on hand. Follow wheel manufacturer safety and dressing guidelines.
11. What routine maintenance does the NGM-4.8 require?
Daily: check grinding wheel condition, fasteners, steering/profiling wheels and battery charge. Follow Honda GX200 engine maintenance (oil, air filter, spark plug) per engine manual. Periodically check stepping motors, electrical connections, and the MCU controller. Lubricate moving parts as recommended by the supplier.
12. What safety precautions should operators take?
Wear appropriate PPE (safety glasses/face shield, hearing protection, gloves and protective clothing). Ensure secure machine mounting on the rail, clear the work area of personnel, be aware of sparks and hot swarf, ventilate to avoid exhaust build-up, and use the emergency stop if abnormal operation occurs. Follow local railway safety and lockout/tagout rules.
13. Can the machine grind both sides of the rail and handle large inclination angles?
Yes. The NGM-4.8 can grind both sides of the rail at 90° and supports large inclination angles enabled by its ±90° tilt range and digitally controlled angle adjustment.
14. What warranty and after-sales support are provided?
The machine carries a 1-year warranty. For spare parts, service, calibration, or training, contact the manufacturer or authorized dealer. Keep purchase documentation and serial numbers handy when requesting support.
15. How can I order the machine or request operator training and certifications?
Contact the manufacturer or your local dealer to place an order, request a quotation, arrange delivery or schedule operator training. Ask the supplier about on-site commissioning, training options, spare parts kits and any available compliance or certification documentation.
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