The MT 620 is a powerful roadheader designed for operation in the hardest rock formations. It performs exceptionally well both in underground mining and in the excavation of road and railway tunnels.
Thanks to its robust design, high power output, and advanced technical solutions, it operates reliably where other roadheaders are no longer effective. The MT 620 is regarded as one of the most advanced tunnelling roadheaders available on the market.
Operational capabilities of the roadheader
The MT 620 roadheader is a heavy-duty machine designed for operation in extremely demanding conditions. Equipped with a 300 kW cutting head and an advanced telescopic boom, the machine is capable of cutting rock with compressive strength exceeding 120 MPa. It can excavate workings with widths of up to 8.8 m and heights of up to 5.8 m. The roadheader is fitted with water spraying and tool cooling systems, which increase operational safety and reduce cutting tool wear. A proportional hydraulic system ensures optimal power utilization while maintaining energy efficiency.
Where is the MT 620 roadheader used?
The roadheader is used wherever a reliable machine is required for excavation in hard and abrasive rock formations. It is a machine of universal character. The MT 620 is employed in metro construction, tunnel projects, as well as in underground mines for preparatory and development works. Due to its performance, durability, and wide operating range, this tunneling roadheader is successfully used in metal ore mines and hard rock operations, and in theory it may also be applied in potash or salt mines if geological conditions require it.
Our offer
We offer comprehensive repair and revamping services for machinery used in the mining industry, especially for roadheaders. We provide professional servicing, regeneration of components and innovative technical solutions under our special programme. Feel free to check out our offer
MT 620 roadheader – technical specification
Below we present the detailed technical specification of the MT 620 roadheader. We encourage you to review it.
| Parameter | Value |
|---|---|
| Overall length | 10.3 m |
| Overall height (above slewing ring / cabin) | 2045 mm / 2885 mm |
| Overall width | 3250 mm (with loader), 2600 mm (without loader) |
| Total weight | approx. 55 t |
| Unit ground pressure | 0.15 MPa |
| Ground clearance | 240–420 mm |
| Power supply | |
| Supply voltage | 1000 V |
| Frequency | 50 Hz |
| Total installed power | 357 kW |
| Cutting head motor power | 200 kW (water-cooled) |
| Hydraulic system motor power | 70 kW |
| Loading motors power | 2 × 36 kW |
| Auxiliary pump motor power | 15 kW |
| Cutting parameters | |
| Maximum cutting height | 4870 mm |
| Maximum cutting width | 7450 mm |
| Maximum roadway cross-section | 34 m² |
| Undercut below crawler level | 205 mm |
| Cutting head peripheral speed | 2.3 m/s |
| Type of cutting head | Transverse (R250WZ-TC50, 2×50 cutting picks) |
| Travel speed | 0–8.8 m/min |
| Tractive force per crawler track | 358 kN |
| Gradient capability | ±18°, with anchoring up to ±32° |
| Cutting boom slewing range | ±45° |
| Cutting boom lifting / lowering range | +63° / –22° |
| Water spraying system | 39 l/min, min. 10 bar |
| Hydraulic system capacity | 700 l (mineral or fire-resistant oil) |
| Cooling system | water cooling (motors, hydraulics, gearbox) |
| Lubrication system | central, hydraulically driven |
| Long-reach telescopic boom The hydraulically stabilized telescopic boom enables precise cutting in high and wide profiles—up to 5.8 m in height and 8.8 m in width. |
Readiness for operation in difficult terrain
Thanks to high tractive force (358 kN) and the ability to operate on gradients of up to ±32°, the MT 620 performs reliably on uneven ground and steep mine floors. |
| High power and cutting efficiency
A 300 kW motor enables effective cutting of very hard rock formations (above 120 MPa). With the application of ICUTROC technology, the roadheader operates successfully where other machines fail. |
Modular design
The roadheader has been designed for easy assembly and disassembly. Its modular structure enables rapid underground transport and facilitates technical servicing in mining conditions. |
- Automatic lubrication system with dosing to selected service points
- Cutting head temperature and load monitoring module (e.g. PTC sensors)
- Advanced control system with PLC operator panel and cutting profile visualization
- Version with cutting head designed for even harder rock formations
- Camera system supporting maneuvering and operational monitoring in confined spaces
- Cutting pick wear sensors and cutting force monitoring
- Methane detection system with automatic power shut-off in emergency situations (ATEX-compliant)
- Set of spare cutting tools and additional pick holders
- Package for operation in highly dusty or wet environments (additional covers, filters, seals)
- Provision for remote diagnostics and remote service access (optional modem or Ethernet port)
Design and main components of the MT 620
Cutting unit
The most important working assembly of the MT 620 roadheader is the transverse cutting head (type R250WZ-TC50), equipped with 2 × 50 cutting picks. It is designed for operation in rock with compressive strength exceeding 120 MPa. The cutting head is driven by a 300 kW electric motor cooperating with a multi-stage gearbox, ensuring optimal torque utilization and efficient operation in the most demanding conditions. The cutting speed ranges from 1.4 to 2.3 m/s.
Boom and slewing system
The telescopic boom of the MT 620 roadheader is hydraulically stabilized and provides precise control of the cutting head both vertically (+63° / –22°) and horizontally (±45°). The slewing assembly, based on a slewing ring and hydraulic cylinders, enables excavation of workings with varied profiles without the need to reposition the entire machine. This solution results in time savings and increased cutting precision.
Loading system and conveyor
Material detached from the rock mass is transferred onto a wide loading table (4.8–5.12 m), from where it is guided by gathering arms (“paddles”) to a chain conveyor with a capacity of up to 350 m³/h. The entire system is protected with 10 mm thick abrasion-resistant steel, significantly extending its service life. This design allows for smooth handling of even large rock fragments.
Undercarriage and travel drive
The roadheader moves on two independently driven crawler tracks with a width of 600 mm, ensuring stability and maneuverability in narrow workings. The MT 620 can operate on gradients of up to ±18°, and with the use of a hydraulic anchoring system—even up to ±32°. A tractive force of 358 kN enables safe movement even under difficult ground conditions.
Power supply, control, and hydraulics
The machine is powered by a 1000 V / 50 Hz supply, with total installed power ranging from 540 to 555 kW depending on the version. Explosion-proof enclosures compliant with ATEX requirements are applied, along with insulation condition and load monitoring systems. The hydraulic system, based on three independent circuits, ensures precise control of all machine functions—from boom slewing to crawler drive. The total hydraulic system flow rate reaches up to 1300 l/min.
MT 620 tunnelling roadheader – price
The purchase cost of the MT 620 roadheader depends on many factors — not only its technical condition, but also the scope of modernization, the type of cutting head, hydraulic system configuration, and the level of optional equipment.
We understand that investment budgets must go hand in hand with the actual operational needs of a mining or tunnelling project — therefore, our company offers an individual approach to every inquiry. In addition to machine sales, we also provide spare parts, technical consulting, and the possibility of adapting machines to specific operating conditions.
Contact us and we will prepare a proposal tailored to your expectations.
Comprehensive support under the RESTART program
If you own or are planning to implement an MT 620 roadheader, you can rely on full support from our team — not only in terms of service, but also engineering expertise.
As part of the proprietary Minostar RESTART program, we offer comprehensive major overhauls, modernizations, and retrofitting solutions that significantly improve the machine’s operating parameters — often exceeding the original manufacturer’s specifications.
We apply our own proprietary design solutions that are not available in standard production.
Cooperation with Minostar means more than basic repair — it is a real enhancement of your machine’s operational potential.
Why us?
12 years of experience
Over a decade of activity, we have acquired knowledge and practical skills that allow us to successfully implement even the most complex projects.
An experienced team
Qualified engineers, mechanics and specialists with many years of experience in the mining industry who are constantly improving their competences.
Comprehensive offer
We offer a wide range of machines, parts and services. We provide support at every stage of the equipment life cycle.
Global reach
We deliver our solutions to customers from all corners of the world, gaining valuable experience in many demanding environments.
MT-620 Roadheader Spare Parts, Service and Upgrades
Our company focuses on supplying spare parts for MT-620 roadheaders that are fully matched to the machine’s design and can be safely used as direct replacements for original components. Each part is developed based on an analysis of real operating conditions, ensuring precise fitment and stable operating performance. In practice, this means that our components not only meet OEM standards, but often provide improved wear resistance and extended service life in demanding underground environments.
The available range includes components for the key systems of the MT-620 roadheader, including:
- cutting unit components (cutting heads, picks, pick holders, drive elements and gearboxes),
- components of the cutting boom and its slewing and positioning systems,
- parts of the muck loading system (loading units, loading tables, gathering arms),
- components of scraper conveyors and muck transport systems,
- elements of the travel system and crawler undercarriage of the MT-620,
- components of the hydraulic power system (hydraulic pumps, control valves, cylinders, hydraulic installation),
- components of the electrical and control systems.
Such a wide range of components enables comprehensive machine servicing – from routine replacement of wear parts to more advanced repair work.
In addition to supplying components, we also provide service, repairs and upgrades for MT-620 roadheaders, tailored to the actual technical condition of the machine. Depending on the operator’s needs, we carry out both the refurbishment of selected assemblies and complete overhaul projects involving the reconstruction of key machine systems. Modernization solutions can also be implemented to improve operational reliability, increase component durability and adapt the machine to current mining requirements.
Comprehensive support for your business
Do you own an MT 620 roadheader or another model and want to extend its service life? Take advantage of our experience in comprehensive overhauls, rebuilds, and technical upgrades of mining machinery.
At Minostar, we combine more than 12 years of experience with proprietary solutions that genuinely reduce downtime and increase operational efficiency. We offer not only refurbishments and spare parts, but also full technical support — tailored to your specific needs.
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