Roadheader type: AM 50
The AM 50 roadheader is a reliable and proven machine that constitutes a basic resource in coal mines in Poland and abroad. This is a self-propelled mining machine designed for driving headings, originally developed by Voest-Alpine Bergtechnik.
Many rebuilt versions of this type of roadheader can be found around the world, and they are still widely used in the mining industry. Over the years, it has become synonymous with efficient driving of dog and chamber headings.
Operational capabilities
The AM 50 roadheader is a lightweight machine designed for driving dog headings with a cross-section of up to 16.4 m². It works well in rocks with compressive strengths of up to 80 MPa, with the most efficient operation in rocks with a strength of up to 60 MPa. This means that it is often used in coal mines.
The roadheader can operate in workings with an inclination of up to ±18° in the longitudinal direction and up to 5° in the transverse direction, which corresponds to typical conditions in coal mines. In the upgraded version of the AM50-ZW, the maximum cross-section of the excavation increases to 22 m², which means that the machine can be used in larger passages and adapted to the growing needs of the mining industry.
Where is the AM 50 roadheader used?
The AM 50 roadheader can be used in underground mines – both in non-methane and methane fields in workings classified as grade “a”, “b” or “c” methane explosion hazard level and grade “A” or “B” coal dust explosion hazard level. However, please remember that it is necessary to de-energise the roadheader in case of a maximum increase in methane concentration of up to 2%, which is a standard safety requirement.
The use of the roadheader for mining rock with abrasive properties, even within acceptable compressive strength limits (e.g., sandstone, sandy shale), causes increased wear and tear on mining picks and spare parts working in direct contact with the rock being mined and transported. This is an important aspect to take into account when planning mining operations and machine maintenance schedule.
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
The AM 50 roadheader – technical specifications
A low and a high version of the AM 50 roadheader is available on the market. They differ primarily in their mining capabilities. The low version allows the mining of cross-sections up to 16.4 m², while the high version increases it to 22 m². The maximum mining heights and widths, as well as the total weight of the machine, also vary accordingly.
The technical specifications given below take into account the parameters of the low and high version.
| Parameter | Value |
| Total length | 7470-7660 mm |
| Height | 1645-1845 mm |
| Width | 1845-2000 mm |
| Total weight | 26-28.4 t |
| Unit ground pressure | 0.11 MPa |
| Power supply | |
| Supply voltage | 500 V, 660 V or 1000 V (depending on version) |
| Cutter motor power | 100 kW |
| Total installed power | 133-169 kW (depending on version and accessories) |
| Cutting parameters | |
| Maximum cutting cross-section from one position | 16.4-22 m² (depending on version) |
| Maximum cutting height | 3758-4262 mm |
| Maximum cutting width | 4800-5100 mm |
| Cutting speed | 2.51 m/s |
| Cutter head type | Transverse |
Compact and manoeuvrable designThe compact design of the AM 50 roadheader ensures high manoeuvrability in confined spaces of mine workings. Simple operation and maintenance translate into lower operating costs and shorter downtime for ongoing maintenance. |
Modular designThe AM 50 roadheader is characterised by a modular design, which makes transporting the machine underground much easier. Each component can be transported separately and then quickly assembled at the work site. |
Resistance to harsh conditionsSurfaces exposed to wear are covered with materials with high abrasion resistance, which extends the life of the machine even in very harsh operating conditions. This is an important advantage in the context of mining abrasive rocks such as sandstone and sandy shale. |
VersatilityThe available low and high versions make it possible to adapt the machine to different working cross-sections. Various power options and the ability to install additional equipment add to the machine’s versatility. |
- A drilling rig or drilling and anchoring assembly.
- An articulated insert that allows for an increased cutting cross-section range.
- Hydraulic working platform with a support setting mechanism.
- Effective spraying system.
- Closed cooling system to reduce water consumption.
- Automatic central lubrication system.
Performance and efficiency
The efficiency of the AM 50 roadheader depends on a number of factors, including the strength of the rock being mined, the organisation of work at the rock face and the qualifications of the operator. Under optimal conditions, AM 50 roadheaders can make progress of 9-10 meters per day, which is a good result for lightweight class roadheaders.
An analysis of roadheader operation shows that the actual operating time of a roadheader at the rock face is typically about 1 hour 45 minutes to 2 hours 30 minutes per shift, with an effective crew working time of about 5 hours. The remaining time is spent on support installation, auxiliary and finishing work, crew travel and return, and other necessary activities.
There are various solutions that can be used to increase the productivity of AM 50 roadheaders, such as integration with anchoring systems, optimisation of the excavated material transport process and use of modern mining tools with increased durability.
If you want to maximise the performance of your AM 50 roadheader, please contact us – we will select the best solutions tailored to your individual needs.
Roadheader type AM 50 – price
The price of the AM 50 roadheader depends on its technical condition, the extent of repair, modernisation and additional equipment. Manufacturer repair costs can be well over the budget, so it is worth getting in touch with us. We will analyse your needs and propose best-suited solutions while ensuring top quality within your budget. If you are interested in buying such a roadheader – do not hesitate to contact us.
Support for your AM 50 roadheader
If you already own an AM 50 roadheader and want to look after your assets comprehensively, check out our roadheader repair and upgrade services. We can restore your roadheader to its factory condition or even improve its original performance through the use of modern technology and highly-durable materials.
As part of the Minostar RESTART programme we can also expand the scope of application of the machine compared to the initial performance described by the manufacturer in the instruction manual. Please familiarise yourself with our repair services for roadheaders and other mining machines.
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Why us?
10 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.
Design and main components
Cutting head gearbox of the AM 50 roadheader
The cutting head is the most critical component of the roadheader, responsible for milling the rock face. The AM 50 roadheader features a transverse cutting head with a diameter of 750 mm at the pick perimeter and a width of 1230 mm (two cutting heads). The cutting head is equipped with tangential-rotary picks that detach the material from the rock face. A cutting speed of 2.51 m/s ensures efficient mining even in harder rock.
The cutting head gearbox (100:20 or 132:16 reducer) is responsible for adjusting the rotation of the shaft on which the cutting elements are mounted to the current operational needs.
Swinging mechanism (turret) in the AM 50
The turret is responsible for accurately positioning the cutting head, which is essential in the process of driving headings in line with the required parameters. It also serves as a central structural element, connecting the two parts of the roadheader frame.
Loader and transport system of excavated material
The loader in the AM 50 roadheader consists of a plough with a base width of 2000 mm, which can be extended by 2500 mm or 3000 mm by adding extensions.
The gathering system, typically in the form of claws, collects the material onto the roadheader loading table. The excavated material is transported by a chain (scraper) conveyor to the conveying equipment behind the roadheader. The gathering mechanism uses a claw reducer that synchronises the operation of the claws and transfers drive from the scraper chain conveyor.
Chassis of the AM 50 roadheader
The crawler chassis ensures the roadheader’s mobility in challenging mining working conditions. The driving system includes a 15/256 and 11/257 driving mechanism reducer, allowing the machine to be manoeuvred with precision. The width of the tracks and their structure are designed to minimise unit pressure on the floor, which is important for machine stability and operational safety.
Control and power system
The roadheader is equipped with an SAE electrical box and a control panel to ensure precise control. The hydraulic system is adapted to supply external hydraulically driven consumers with adjustable pressure.
Minostar – reliable support for your business
Looking for a company to take all-round care of your AM 50 roadheader? With many years of experience and a team of qualified specialists, we are able to offer solutions tailored to the individual needs of our customers. Over the years, we have developed our own solutions which, in line with the principles of circular economy, seek to minimise downtimes and optimise water and electricity consumption.
By working with us, you will not only get a reliable machine, but also comprehensive technical support and solutions which you won’t find anywhere else. Feel free to take advantage of our services!