MR 340 roadheader – technical data and machine specification
This is a modern, self-propelled mining machine designed for efficient excavation of roadway and chamber workings in demanding underground conditions. It is one of the most highly regarded roadheaders in its class, successfully used in mines around the world.
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Operational capabilities of the roadheader
The MR 340 roadheader is a heavy-duty cutting machine designed for the excavation of workings with cross-sections of up to 34 m². Thanks to its robust design, high tractive force, and the use of modern hydraulic and electrical systems, it performs exceptionally well in medium- and high-strength rock formations.
The machine can operate in workings with inclinations of up to ±18°, and with the use of an anchoring system — even up to ±32°.
The roadheader is also designed for operation in potentially explosive atmospheres (ATEX).
Where is the MR 340 roadheader used?
The MR 340 roadheader is used in underground mining operations worldwide — both in hard coal mines and in deposits of shale, sandstone, and other medium- to high-strength rock formations. Owing to its high cutting capacity, it is successfully employed in the excavation of main haulage, technical, and production roadways.
The machine performs excellently during preparatory works in new seam areas as well as during the expansion of existing mining infrastructure. The MR 340 supports mineral extraction in locations with difficult geological conditions while aligning with ongoing technological progress and innovation in mining. Its design and technical capabilities make it a reliable working partner at any mining face.
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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
MR 340 roadheader – technical specification
Below we present the technical specification of the MR 340 roadheader. It is worth noting that it is almost identical to that of the MR 360 roadheader, with the only difference being the larger cutting profile of the MR 360 model, achieved through the use of an elevated slewing ring and an extended cutting boom.
All other structural, hydraulic, electrical, and operational parameters remain unchanged.
| 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 and output | |
| 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 (ITP) | 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 |
| High cutting power A 200 kW motor ensures effective cutting even in hard rock formations with UCS of up to 100 MPa. |
Modular design
Components can be quickly dismantled and transported underground, which facilitates assembly and reduces downtime. |
| Resistance to harsh conditions
Wear-prone components are protected with abrasion-resistant materials, extending the machine’s service life in demanding environments. |
Versatility of applications
The machine can operate in roadways and chambers, on gradients of up to ±32°, and is designed for use in potentially explosive atmospheres (ATEX). |
- ITP-type water spraying system with high-performance conical nozzles (for dust suppression and improved methane safety).
- Cutting gearbox version with water cooling.
- Central multi-line lubrication system with the possibility of individual grease flow adjustment.
- Hydraulically or mechanically extendable side elements of the loading table (range from 4.72 m to 5.12 m).
- Reinforced EF58 cutting picks for operation in highly abrasive rock (shale, sandstone, marl).
- Anchoring system for operation on gradients of up to ±32°.
- Explosion-proof installation compliant with ATEX certification (for operation in methane and dust hazard zones).
- Optional working platform and roadway support lifting devices.
- Temperature sensors for windings and bearings in main motors (PTC).
MR 340 roadheader – price
The purchase cost of the MR 340 roadheader depends on several factors — primarily its technical condition, the scope of refurbishment work carried out, the level of modernization, and the available optional equipment. Purchasing a new or extensively modernized unit directly from the manufacturer often involves costs that exceed the budgets of many mining operations; therefore, it is worth considering alternative solutions, such as acquiring a roadheader after a professional overhaul.
Our company regularly prepares and offers MR 340 roadheaders after comprehensive refurbishment and renewal — fully operational, carefully inspected, and ready for underground work.
If you are interested in purchasing this type of machine, please contact us. We will be happy to provide information about the current availability of MR 340 roadheaders and units that may soon be prepared for sale.
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Spare Parts, Repairs and Upgrades for the MR-340 Roadheader
We specialize in supplying spare parts for MR-340 roadheaders that are fully compatible with the design of this machine and can directly replace components used in its original configuration. The components we provide are developed on the basis of a detailed analysis of the MR-340 roadheader structure, ensuring full dimensional, installation and functional compatibility. In many cases, these parts also offer greater durability and improved wear resistance, which is particularly important during operation in demanding underground mining conditions.
Our product range includes components for the key assemblies of the MR-340 roadheader, including:
- components of the MR-340 cutting unit (cutting heads, tangential-rotary picks, pick holders, cutting unit gearboxes),
- components of the cutting boom and its slewing and positioning mechanisms,
- parts of the muck loading system (loading units, loading tables, gathering arms),
- components of the scraper and chain conveyors used in MR-340 roadheaders,
- components of the travel system and crawler undercarriage,
- parts of the MR-340 hydraulic system (hydraulic pumps, control valves, hydraulic cylinders, valves and hydraulic hoses),
- components of the electrical system and control systems.
Such a wide range of available components allows for quick fault removal and helps maintain high technical efficiency of the machine while operating at the tunnel face.
Minostar also carries out repairs, rebuilds and upgrades of MR-340 roadheaders. Depending on the operator’s requirements, this may include refurbishment of selected assemblies or comprehensive reconstruction of key machine components – including the cutting unit, drive systems, hydraulic system and structural elements of the roadheader. These measures help restore the machine’s full technical performance and extend its service life in underground mining operations.
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.
Comprehensive support for your business
Do you own an MR 340 roadheader or another model and want to extend its service life? Take advantage of our experience in comprehensive refurbishment, rebuilding, and technical upgrades of mining machinery used in the extractive industry.
Over the years of our operations, we have developed our own solutions based on proven technologies and aligned with the principles of the circular economy — all aimed at minimizing downtime and optimizing water and electrical energy consumption.
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Design and main components of the MR 340 roadheader
Cutting unit and gearbox of the MR 340 roadheader
The key working assembly of the MR 340 roadheader is the cutting head equipped with 2 × 50 cutting picks mounted in EF58 system holders. The cutting head is designed for cutting rock with compressive strength of up to 100 MPa. It is driven by a 200 kW electric motor cooperating with a three-stage gear transmission (bevel, spur, and planetary), delivering torque exceeding 51000 Nm. The cutting speed is 2.3 m/s, enabling effective operation even in difficult geological conditions.
Slewing mechanism (turntable)
The slewing assembly allows precise control of the cutting head both vertically (+63° / –22°) and horizontally (±45°). The design is based on a slewing ring and hydraulic cylinders, ensuring system rigidity and operational safety during excavation in hard rock formations.
Loading system and conveyor
The excavated material is transferred onto a loading table with adjustable width ranging from 4.72 to 5.12 m, from where it is moved by two gathering arms (“paddles”) to the chain conveyor. The twin-chain conveyor, with a capacity of up to 300 m³/h, enables efficient material haulage. Components in contact with the excavated material are protected with 10 mm thick abrasion-resistant steel.
Undercarriage
Two independent crawler drives with a track width of 600 mm ensure maneuverability and allow operation in workings with inclinations of up to ±18°, and with the use of an anchoring system — even up to ±32°.
Power supply, control, and hydraulics
The roadheader is powered by a 1000 V / 50 Hz supply, with a total installed power of 357 kW. Explosion-proof enclosures as well as insulation and load monitoring systems are applied. The hydraulic system is based on three independent circuits with pumps providing a total flow rate of up to 1300 l/min, ensuring precise control of all machine functions.
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