DGM-2-2 II Electric Rail Grinding Machine
DGM-2.2 II Electric Portable Rail Grinding Machine Introduction:
The DGM-2.2 Electric Rail Grinding Machine (Type II) is designed to grind rail weld seams and correct rail surface defects. It is suitable for various grinding works, such as welded joints of 43 kg/m – 75 kg/m rail tracks, uneven rail joints, rail-side excess metal (burrs), surface weld repairs. It is a common tool for railway overhaul, maintenance, and emergency repair operations. This Portable rail grinder is specially developed for turnout (switch) maintenance. It is mainly used for repairing defects on switch rails (≤ 50 mm section width), movable frog rails and wing rails. The rail grinding machine is lightweight, safe, reliable, and improves grinding accuracy for turnout components.
- High working efficiency
- Excellent grinding quality
- Simple operation
- Convenient on/off-track handling
Function: It is a multifunctional rail grinding machine for railway overhaul, maintenance, and emergency repair operations. This electric rail grinding machine is widely used to restore rail profile, reduce the progression of surface damage, and improve wheel-rail contact conditions. Rail grinding maintenance enhances passenger comfort, reduces noise, extends service life, and lowers maintenance costs.
Technical Specifications of DGM-2.2 Rail Grinding Machine
| Item | Parameter | Specification |
|---|---|---|
| 1 | Motor Type | Vertical Y-type, 380V, 50Hz |
| 2 | Rated Power | 2.2 kW, 2850 r/min |
| 3 | Grinding Wheel Type | Resin thick-wall cup wheel |
| 4 | Grinding Wheel Dimensions | 150 × 56 × 70 mm |
| 5 | Feed Method | Manual with locking |
| 6 | Feed per Pass | 0.3 – 0.5 mm |
| 7 | Total Feed Travel | 45 mm |
| 8 | Feed Accuracy | ≤ 0.10 mm |
| 9 | Wheel Tilt Range | 90° (one direction) |
| 10 | Profiling Function | Outer edge contour grinding for various rail types |
| 11 | Weight | 42 kg |
| 12 | Dimensions | 1460 × 470 × 770 mm |
| 13 | Applicable Rail Types | P43 – P60 kg/m rails |
Working Principle of Electric Rail Grinding Machine
After starting the DGM-2.2 Electric Rail Grinding Machine, the electric motor provides rotary motion transmit power through a synchronous belt pulley, which connects to the cup grinding wheel and rotates at high speed. The operator uses a manual handwheel to control the grinding wheel feed, enabling precise adjustment of grinding depth to achieve accurate rail surface finishing.
Structure of DGM-2.2 II Electric Rail Grinding Machine
The basic structure of DGM-2.2 II Electric Rail Grinding Machine is composed of machine frame, electric motor, handle assembly, feed handwheel, hanging wheel, profiling rollers, cup grinding wheel.
Safety Precautions
Before rail grinding work, the operator must wear protective equipment such as safety glasses and gloves, and operate the rail grinder using both hands, firstly inspect the motor and wiring for leakage， then perform at least 2 no-load test runs in a safe area. If sparks approach flammable materials, protective measures must be taken immediately. The operator of rail grinding machine shall follow the list of operational guidelines.
- The rail grinder is mainly used for post-welding grinding and rail profile restoration.
- The operator can grind the rail head and side in one operation.
- The rail grinder position can be adjusted from horizontal to vertical.
- The grinding wheel axis must remain perpendicular to the rail axis.
- The profiling rollers and hanging wheel must closely contact the rail contour to ensure accurate guidance and profile restoration.
How to Prevent Accidents
High-speed rotating grinding wheels usually cause accidents in rail grinding machine. So the operator has to regularly inspect the wheel and check for loose fastening nuts to ensure the safety guard is securely installed. Damaged grinding wheels must be replaced; the grinding wheels must rate above 4000 r/min; wait until the rail grinder is stopped before the replacement. After replacement, run the machine idle for 30 seconds. Keep personnel away during testing. And lastly, store grinding wheels in a dry environment.
How to Operate DGM-2.2 Rail Grinding Machine
1 Rail Grinding Machine Positioning
- Place the grinder onto the rail.
- Move it along the rail using the two profiling rollers (6).
- Ensure the hanging wheel (5) contacts both sides of the rail and rotates freely.
- Rotate the handwheel (4) clockwise to lower the cup grinding wheel (7).
2. Grinding Process (2-Stage Method Recommended)
(A) Rough Grinding
- Move the grinder along the rail while gradually lowering the wheel.
- Grind until approximately 1 mm remains above the rail surface.
- Start grinding from the rail head, then proceed to the rail side.
- Reverse the machine to grind the opposite side.
(B) Finish Grinding
- Reposition the grinder.
- Lower the wheel until it just contacts the untreated rail surface near the weld.
- Begin grinding from the rail head, then the side.
- The grinding area should extend 100 mm on both sides of the weld.
- Slightly lower the wheel to compensate for wheel wear.
When rail grinding is finished, rotate the handwheel counterclockwise to raise the grinding wheel. Prepare for the next weld grinding operation.
Maintenance for DGM-2.2 II Rail Grinding Machine
The DGM-2.2 Electric Rail Grinding Machine is a high-efficiency and precision rail maintenance tool designed for railway construction, overhaul, and emergency repair. Proper operation, regular maintenance, and strict compliance with safety procedures will ensure optimal performance, extended service life, and reliable grinding quality. AGICO also sells DGM-2.2 I rail grinding machine as the internal combustion model. If you are interested in rail grinding machines, send a free quote now for the latest price offer.
- Regularly lubricate and replace grease in the spindle rolling bearings.
- Lubricate the rolling bearings of the rollers periodically.
- Apply grease regularly to the feed screw pair and its supports.
- Inspect fasteners and safety guards before each use.
- Store the machine in a dry, clean environment after operation.
We receive enquiries in English, Español (Spanish), Русский язык (Russian), Français (French) and العربية (Arabic). Our professional team will reply to you within one business day. Please feel free to contact us!
