MAAG® GEAR Bevel Sets 

Gears for crushers

MAAG® GEAR CPU Gear Unit 

Gear pinions

MAAG® GEAR Girth Gear

MAAG® GEAR LGDX Gear Unit 

MAAG® GGL Girth Gear lubrication

MAAG® GEAR PPU-C Gear Unit 

MAAG® GEAR Symetro™ Gear 

MAAG® GEAR WA / Temperex Gear

Gears for horizontal mills 

Gears for kilns

MAAG® GEAR KA / KB / Temperex

Gears for other applications

MAAG® GEAR PPU Gear Unit 

Gears for roller presses

MAAG® GEAR CEM Drive

MAAG® Iron Drive Gear Unit

MAAG® GEAR MAX Drive System

MAAG® GEAR WPU Gear Unit 

MAAG® GEAR WPV Gear Unit 

Gears for vertical roller mills

Innovative products for seamless operations in the cement industry

Cement

Precise technologies for extracting precious minerals

Mining

Versatile gear solutions for diverse industrial applications

Other industries

Our service and maintenance products are provided by highly experienced gear specialists, who work with you to achieve optimal equipment availability and uninterrupted production. With our services, maintenance costs become more predictable. We also share knowledge with your maintenance staff, helping you to keep your gear unit in optimal condition. Recommendations and engineering solutions for all type of gears including emergency help.

Aftermarket

Experience peace of mind with our comprehensive service and aftermarket solutions – as reliable as our products.  Explore our offerings and discover how we support your success beyond the sale

Browse through all product and industry related brochures, instructions and data sheets in our Download Center.

Download Center

Switzerland

Poland

Italy

International 

Contact our service team - we are available 24/7 for emergencies and individual support requests.

Get in touch with our experts to discuss your specific demands.

First cement was delivered at the new Ouled Ghanem cement plant near El Jadida, Morocco, in late 2022. The plant includes the first installation of a latest-innovation MAAG® IronDrive gear unit.

New-generation MAAG® gear unit starts work at Ouled Ghanem cement plant

Follow us on social media to stay updated with the latest news, events, and exclusive content. Join our online community and be part of the conversation!




Stay Connected!

Our talented team members, Marli and Roger, delivered an insightful session, and we were thrilled to see an enthusiastic audience with participants tuning in from all over Brazil, representing all CSN factories! 


MAAG Gear Invited by CSN for a virtual presentation on our Condition Monitoring System

Our recent sales workshop, "The MAAG Way of Selling," was a great success, inspiring the team and reinforcing our commitment to continuous improvement in serving our customers. As our CCO, Marco Bergamaschi, put it, “This program strengthens our culture of excellence and ambitious goals.” A visit to Leonardo da Vinci’s Museum wrapped up the two-day session—perfectly reflecting our values of innovation and going the extra mile. Thank you to everyone involved!

The MAAG "Way of Selling" Sales Workshop Milano, 16-17 October 2024

Stay up to date with industry insights, product innovations, and exclusive updates

Stay up to date with industry insights, product innovations, and exclusive updates from Maag Gear.
📩 Don’t miss out—simply fill out the form on our website to subscribe and be one of the first to receive it when it’s ready: www.maaggear.com


Our newsletter is on its way, we're gathering as many subscribers as possible.

MAAG Participation at Mining and Metals Central Asia 2024

📅 Save the date for September 17-19, 2024, and join us at Mining and Metals Central Asia 2024, which will be held in Almaty, at the Atakent IEC for 2 days of innovation, networking, and insightful discussions.
📍Visit us at booth Booth № 312 - pavilion № 11,  to see how MAAG is leading the future of mining with true innovation! 

Join us at Mining and Metals Central Asia 2024, in Almaty, at the Atakent IEC. September-17-19-2024 

Stay tuned for the next Conference participation, will be announced very soon ...

We truly enjoyed engaging with so many industry leaders and showcasing our newest innovations in cement technology. We hope you had the chance to:
👉 Explore our state-of-the-art solutions: Learn about our products and latest innovations www.maaggear.com 
👉 Discover increased efficiency: See how our innovations can streamline your processes
👉 Witness enhanced product quality: Experience how our solutions deliver improved consistency and reliability.
We really value the conference and found it to be highly fruitful. Let’s cheer for gears!

Thank You for Stopping by MAAG GEAR at Cemtech Conference 2024!

Two persons next to each other that have been hired by MAAG

We are thrilled to announce the newest members of the MAAG Gear family. Please join us in welcoming David Almond and John Jespersen to our team!

Exciting New Additions to the MAAG Gear Team: Welcome David Almond and John Jespersen! 

Vertical roller mills and ball mills are regularly taken out of operation for routine maintenance. Some plants even shut their mills down every week. Yet, gearbox inspections are typically scheduled for the annual maintenance shutdown when resources are stretched. This is making life harder than it needs to be for all involved. Let’s simplify things. Consider scheduling your gearbox inspection to later in the year when you can access the expertise and tools you need. This way you can be sure you’ll have access to the most experienced service technicians, equipped with all the tools they need to get the job done.

Schedule your gearbox inspection 

Today, let's dive into the details of the test run process

At our workshop, every gearbox undergoes a rigorous test run to ensure it meets the highest standards of performance and reliability. Today, let's dive into the details of the test run process for the WPU-12/TS1 gearbox.

Gearbox test run: ensuring reliability and performance

Man standing before large vertical roller mills

The global trend towards single-mill cement plants is unquestionable. With civil construction cost savings, higher throughput and lowered maintenance costs, the use of single large VRMs for cement and raw grinding is the optimal choice. The sheer size requires powerful, large-scale drive gear systems. 

Larger gear drives for larger vertical roller mills

We’re thrilled to share the success of this incredible event!

It was an amazing opportunity to connect with industry leaders, explore cutting-edge innovations, and solidify MAAG GEAR’s position at the forefront of mining technology.
We proudly presented our comprehensive portfolio of advanced technologies, highlighting our unwavering commitment to driving innovation in the mining sector.
A special thank you to our partner, @TMSA, for their outstanding cooperation and teamwork in promoting our products across the CIS market. @Artem Laptev, MAAG Gear's Regional Sales Manager said " Your collaboration made this experience even more rewarding!"
Looking forward to many more successful ventures together! 


Back from Kazakhstan - Mining and Metals Central Asia 2024

MAAG Participation at Cemtech Europe 2024 

Mark your calendar for Cemtech Europe 2024 at Hilton Warsaw City Hotel, Poland 29 September - 2 October, 2024. Come and visit us at Booth No. 14 to gain exclusive insights from our experts on our exceptional, industry-leading range of MAAG products in the cement market.
Don't miss this opportunity to network with industry leaders and discover how our innovations can elevate your business.
Looking forward to connecting with you there!


MAAG Gear at Cemtech Europe 2024 at Hilton Warsaw City Hotel 29 September - 2 October, 2024.

How can I ensure long-term, reliable performance for my mill or kiln? 

Curious about how you can achieve long-term, reliable performance with our high-quality girth gears? In this article, we reveal the key factors that make our solutions stand out for your projects. Dive in to discover more—enjoy the read!

You can achieve lasting success with MAAG® GEAR Girth Gears

Thrilling news! Our upcoming conference is locked in, and this time, we’re headed to India! 
NCB International Conference & Exhibition on Cement 2024 from November 27-29, 2024, at Yashobhoomi, IICC Dwarka, New Delhi.

📍 Booth No. 59 is where the action happens! 


MAAG Gear at NCB Conference 27-29 November, 2024.

BRUTAL Marathon Team in Italy at finish line

June was a vibrant period for MAAG GEAR, filled with sportive and social events that brought our team closer together. Our participation spanned various activities, including running and biking marathons in Elbląg and a walking race in Milan.

A Month of Sportive and Social Triumphs

1ST NOVEMBER 2024 🌟 Wishing everyone a blessed All Saints' Day and a joyful Diwali! May the lights of Diwali guide us with hope and wisdom, and may the blessings of All Saints bring peace and inspiration. Let's embrace this season of remembrance and celebration, filling our hearts with gratitude and joy. 🌟

Wishing everyone a blessed All Saints' Day and a joyful Diwali! 

We are thrilled to share the highlights from our recent participation in MinExpo, the largest mining fair.
"MinExpo is renowned for its scale and the diversity of companies it attracts from across the Americas," said Dave Almond 
As Tomasz Wróblewski noted, "Overall, the meetings were very positive, resulting in a mutual desire to explore cooperation possibilities. We are excited about the future prospects and look forward to building on these new relationships."

MAAG MINExpo 2024 in Las Vegas

Service centered

Preventive Maintenance

Overhaul

Urgent repairs and technical solutions to keep customer’s production running

Service and Aftermarket

Increase the energy efficiency of your vertical roller mill. Reducing energy consumption is a top priority for both environmental and economic reasons. But you can't afford to lose performance in your VRM. Our MAAG® GEAR CEM Drive system achieves both, powering VRMs up to 14 000 kW with a compact integrated motor that reduces power loss by more than 20%.

Where there’s power, there’s potential. That was the thinking behind the design of the CEM Drive. We knew we could bring down energy consumption and the associated CO2 emissions with some straightforward engineering. And that’s exactly what we’ve achieved. By combining our proven MAAG® planetary gear technology with an innovative electric motor – and removing the bevel stage – we’ve reduced power loss, cut carbon emissions and created a compact drive system that fits in almost any vertical roller mill.

The most compact drive system for vertical roller mills

What’s more, we’re also making the most of digital tools to enhance performance and reliability. The IOT-ready CEM Drive can utilise continuous condition monitoring to keep an eye on your drive. With Predicta, our online condition monitoring service, sensors catch the earliest signs of wear and tear, enabling you to react before problems have the chance to develop into events. When you add mySentinel service agreements, you take your maintenance strategy from reactive to proactive – totally eliminating unplanned downtime. Your drive system will never let you down again.

The modular design of our MAAG® CEM Drive system covers a power range from 4000 to 14 000 kW. The integrated motor eliminates the traditional bevel gear stage, which not only makes the compact configuration possible but also reduces the number of rotating parts and bearings in the entire drive train to an absolute minimum. This simplifies installation and service, and of course reduces maintenance costs.

Because we know that your feed characteristics change, we also wanted to make sure your mill could adapt on the fly. The variable frequency converter that powers the integrated motor enables you to quickly and easily optimise your grinding process for maximum results.

Downsizing the footprint, upgrading the power

Downsizing the motor to fit in the available space of a bevel gear stage was the most challenging part of designing our CEM Drive system. The solution is a permanent magnet synchronous motor with single-tooth stator coils and with direct oil cooling for the stator. The use of permanent magnets minimises resistive losses, giving you reduced energy costs. In combination with the frequency converter, the motor delivers constant torque over a wide speed range, with consistently high efficiency. As a result, we’ve managed to up the capacity of the drive system while reducing the footprint. Now, the size of the drive system depends only on the dimensions of the mill table. The compact size gives the flexibility to use the same CEM Drive for multiple mill sizes, allowing fewer spare gears needed for insurance. This makes the MAAG® CEM Drive an obvious choice for retrofit and upgrade projects, and gives you the possibility to do more with less.

Easily adapts to different material characteristics

Highly energy-efficient operation

IOT-ready for optimised reliability

Compact footprint

A low maintenance drive system – high availability, high reliability

Space-saving design – without compromising function

The integrated motor includes loss-optimised single-tooth coils and a wear-free self-exciting permanent magnet rotor. The self-excited rotors make external excitation devices unnecessary. Together with the embedded magnets, which concentrate the magnetic fields in the integrated motor, this feature contributes to the CEM Drive’s space-saving and low-maintenance design. Furthermore, the single-tooth coil decreases the axial length of the motor and the total amount of copper also reduces corresponding ohmic losses.

The MAAG® CEM Drive uses direct oil cooling, ensuring the integrated motor is completely separated from the dusty environment around the vertical roller mill. This also means that the gear lubrication oil is not contaminated with other cooling media. As the motor cooling requires the same amount of oil as a bevel gear stage, the size of the lubrication system remains the same – giving you more functionality with identical compact dimensions.

An internal geared coupling transmits the motor torque to the well-proven MAAG® PV gear stage, a double planetary gear stage with torque split. This double planetary configuration has been used successfully in our MAAG® CEM Drive gear unit for many years. It allows for a reduction in both the tooth length and the losses in the second gear stage because it transmits only 75-80% of the torque. The self-centring inner gear ring and sun pinion deliver optimised force flow from the first to the second planetary stage.

The thrust bearing, which supports the mill table of your vertical roller mill, absorbs the static and dynamic loads from the grinding process. Each bearing pad in the MAAG® CEM Drive system is lubricated with high- and low pressure oil and lined with Babbitt metal at the contact surface. The circular, even shape of the casing guarantees an optimal force flow from the mill table into the foundation of your vertical roller mill. Both the gear part and the integrated motor of our MAAG CEM Drive system are equipped with slide bearings. Compared to roller bearings, slide bearings offer higher damping and their unlimited lifespan provides smoother operations and exceptionally high availability for your vertical roller mill.

The MAAG CEM Drive combines proven technology and parts from the IronDrive series with the necessary adjustments to deliver high functionality for vertical roller mills. The standardised design allows you to use the drive unit in all types of mill - optimal for vertical roller mills.

Oil supply unit keeps the gear unit running smoothly

The oil supply units for our vertical roller mill gear units and drive systems includes low-pressure pumps to feed bearings and gears with filtered and cooled lubrication oil. High-pressure pumps supply the oil for the thrust bearing from a separate compartment of the tank filled with chilled and filtered oil from the low-pressure section. Using only clean oil on the high-pressure side allows us to improve the lifespan of pumps and thrust bearing segments.

Downloads

Optimise your vertical roller mill with our robust gear unit. A unique drive system for vertical roller mills, our MAAG® GEAR WPV is a three-stage, bevel-planetary gear unit that reliably drives your mill. This robust gear unit uses torque split to give you highest power output in a compact design with straightforward servicing.

Modern vertical roller mills in the cement industry require gear units that are up to the challenge of handling higher performance densities and capable of transferring more torque. Current cement producers are also seeking optimum grinding table speeds, which determines the output drive speed of the gear unit. Increasing total gear ratios are the consequences of slower table rotation at the same gear unit input speed. Our MAAG® GEAR WPV with its masterful three-stage gear arrangement achieves all these aims – without compromising on reliability or ease of maintenance.

Innovative gear unit drives high output for your vertical roller mill

Introduced in 2007, the three-stage concept of this bevel-planetary gear unit is FLSmidth’s answer to ever-increasing mill sizes – and our MAAG® GEAR WPV has gone from strength to strength since its first implementation.

Unlike conventional two-stage gear units that require larger bevel wheel dimensions to increase power output, our WPV uses two planetary stages to move gear ratio from the bevel to the planetary stage. This adaptation reduces the size of the bevel wheel, keeping the gear unit compact and delivering the high-power output you need for your vertical roller mill.

The unique double-planetary gear with torque split in the WPV Gear Unit allows the unparalleled performance range upwards of 8,000 kW. The first gear stage passes about 25% of the torque directly to the output flange. With the remaining 75% in the second stage we accomplish the reduction in both tooth length and losses. The four planets in the second stage all use smaller gear wheels than typical gearboxes with two planetary stages in serial arrangement, allowing for high drive output in less space.

Unique design for economical and reliable operation

Easy maintenance and compact design are normally competing interests, but we have managed to combine both in our MAAG® GEAR WPV Gear Unit. The double planetary gear stage provides impressive compactness, together with a loss reduction in relation to the torque split.

The thrust bearing arranged around the first planetary stage supports the mill table and absorbs static and dynamic loads from the grinding process. Each bearing pad is lubricated with high- and low-pressure oil and the pads are lined with Babbitt metal at the contact surface. The bevel and the planetary gears are equipped with slide bearings. These bearings not only provide unlimited lifespan, but also deliver smoother operation because of the higher damping compared to anti-friction bearings – increasing the overall availability of your vertical roller mill.

Large manholes in the lower casing part provide direct access to the bevel gear, letting the WPV gear unit remain in place under the mill during inspections and servicing and reducing any related downtime. Our WPV Gear Unit also simplifies maintenance by allowing you to easily adjust the tooth contact from the outside and quickly removing or adjusting the bevel pinion from outside the gear unit.

Dependably uncomplicated, with room for customisations

Despite the varying requirements of different mills and applications, the parts used in our MAAG® GEAR WPV have a high degree of standardisation. This consistency makes it an optimum gear unit solution for operating safety and reliability in the cement industry. Our WPV Gear Unit is available as standard solution or can be customised to suit your unique operational needs. The combination of the WPV’s high-grade bevel gear, innovative double-planetary gear and our unparalleled online condition monitoring lets you rely on common drive technology – even in high-power applications. With the WPV, you can implement new drive solutions without the need for complex control systems.

Highest power with cost-effective investment

Long service life and high operational reliability

Smart design and modern manufacturing deliver cost-effective results

Simplified maintenance

Well-thought-out gear unit smoothly drives your vertical roller mill

Through carefully considering the power ranges and table diameters of various vertical roller mills, the design of our standardised MAAG® GEAR WPV fits with every process and under every mill. Customise your gear unit installation by taking advantage of our variety of auxiliary systems

Low-maintenance, high-performance connections

The flexible coupling that comes standard with the MAAG® GEAR WPV Gear Unit is almost maintenance free, as it requires no lubrication. It also keeps vibratory loads low in the drive train and allows relatively wide ranges for axial and radial misalignment. These features combine to give you reliable function, with low operating costs.

Bring it all together with an auxiliary or maintenance drive

A maintenance or auxiliary drive that is tailored to your requirements rounds out the scope of supply for your WPV Gear Unit. The maintenance drive is placed between the motor and gear unit and allows you to rotate the mill table very slowly. This simplifies maintenance work at your vertical roller mill, including replacing lining plates or rebuilding surfaces through welding. The auxiliary unit is mostly used to start the mill when the breakaway torque is too substantial to start the motor directly. The fluid coupling of the auxiliary unit guarantees smooth acceleration and the overrunning clutch automatically disengages the auxiliary drive after the main motor starts.

The oil supply units for our vertical roller mill gear units and drive systems includes low-pressure pumps to feed bearings and toothings with filtered and cooled lubrication oil. If required, high-pressure pumps supply the oil for the thrust bearing from a separated compartment of the tank filled with filtered oil from the low-pressure part. Using only clean oil on the high-pressure side allows us to improve the lifespan of the pumps.

Beyond a basic condition monitoring system

All of our gear units and drive systems are equipped with unparalleled condition monitoring sensors. Normally, these types of sensors keep an eye on critical operating parameters like bearing temperatures, casing vibrations, etc. and trigger a mill shutdown in the case of exceedances.

Our condition monitoring system does much more. It lets you set up condition-based preventive maintenance that uses continuous monitoring and data analysis to detect wear and tear at an early stage. With this enhanced information, we help you plan maintenance and servicing in advance – reducing downtime and keeping your plant running smoothly.

A gear unit that helps you reduce operational costs. Cut operating costs. It is that simple. The new MAAG IronDrive Gear Unit is our most efficient drive for vertical roller mills of all sizes, enabling you to increase sustainability. Reliable and safe – it’s the ideal gearbox for all vertical roller mill applications, including coal grinding.

The power consumption of your vertical roller mill is a significant operational cost - with a hefty environmental impact With the new MAAG IronDrive Gear Unit, you have the opportunity to reduce your costs while still benefiting from the exceptional reliability of this bevel planetary gear unit. Suitable for a wide range of mills and arrangements, the series accommodates power ranges from less than 1000 up to 9000 kW.

The most efficient gear unit for your vertical roller mill

The MAAG IronDrive combines proven technology with the necessary adjustments to deliver high functionality for vertical roller mills in cement plants and other industrial segments. The standardised design of the IronDrive gear unit allows you to use the drive unit in all types of mills and plant arrangements.

The MAAG IronDrive has the most maintenance friendly design compared to its predecessors. We put a strong focus on operational safety with smart design features like:

Safety shoulder to protect the planetary stage from excessive table wobbling, Good accessibility to the bevel stage for inspections or periodical maintenance without having to remove the gear unit from below the mill.

The MAAG lubrication concept with an external oil tank allows access to the bevel stage at any time without having to first drain the lube oil into separate oil containers

The MAAG IronDrive fits perfectly in the classic vertical roller mill drive arrangement, where a horizontally oriented electrical motor provides the drive power and rotary motion. The first reduction stage in the gear unit, the bevel stage, redirects the horizontal rotation into the vertical axes of the mill and is followed by a planetary gear stage, according to your torque and ratio requirements.

The ring gear of the planetary stage is used directly as part of the casing in the larger series of our MAAG gear units. This design feature enables us to apply the bigger ratio in the planetary stage and consequently to minimize the ratio in the bevel gear stage. In this way, we can increase the transmittable torque of the MAAG IronDrive to the maximum.

All of our gear units are equipped with unparalleled condition monitoring sensors. Normally, these types of sensors keep an eye on critical operating parameters like bearing temperatures, casing vibrations, etc. and trigger a mill shutdown in the case of exceedances.

Our Predicta online condition monitoring services do so much more. Now you can set up condition-based preventive maintenance that uses continuous monitoring and data analysis to detect wear and tear at an early stage. With this enhanced information and mySentinel Service Agreements we help you plan maintenance and servicing in advance – reducing downtime and keeping your plant running smoothly.

Customised to your vertical roller mill

Ultimate efficiency for reduced VRM power consumption

Reduced operating costs

Optimal longevity, reliability and performance

Streamlined servicing

Powerful drive system for peak performance in vertical roller mills. With twin drives delivering maximum power, our MAAG® GEAR MAX Drive System builds on our proven track record and rises to the need for increased capacity in your vertical roller mills. The robust reliability of this three-stage drive system is further enhanced by the torque split, self-aligning pinions and flexible coupling.

Our three-stage spur gear unit with torque split, the MAAG® GEAR MAX Drive system uses two equal drive units to deliver power up to 15,000 kW for your vertical roller mill. We’ve taken the expertise in gear technologies and manufacturing we’ve built up over the last 100 years and applied them to this modular drive concept specifically for vertical mills. The matched drive units, torque split, reliable components and our proven track record make our MAX Drive an ideal fit for cement and slag grinding – bringing maximum power to your vertical roller mill.

True strength from our modular drive system for vertical roller mills

The modular concept of the MAAG® GEAR MAX Drive System allow for a compact arrangement without unnecessarily increasing the complexity of monitoring and the connection to the power grid. The two drive units include a vertical asynchronous motor directly flanged to the casing and are each connected to a central girth gear.

When both drives are running, the MAX Drive has a power range from 5,000 to 15,000 kW. You can also operate just one drive, allowing you to continue production at reduced output while performing maintenance on the other drive unit or half of the rollers.


The power behind our MAX Drive comes from two equal gear units that operate the girth gear around the central part on two flanks. These twin gear units transmit power from the electric motors to the grinding table and reduce the motor’s speed to precisely what you require for the grinding process.

In addition to enabling its compact size, the torque split of our three-stage MAAG® GEAR MAX Drive ensures that the total torque to the mill is always equally distributed between the two pinions. The highly flexible couplings used in the MAX Drive automatically equalise any torque imbalances between the two pinions – ensuring equal load distribution between the two gear trains in each drive unit. The coupling also allows you to adjust the correct timing between the output pinions and the central girth gear and guarantees smooth operations through its damping of torque peaks and adaptable stiffness.

The pinions are also self-aligning, providing full tooth contact, even if there is a small run-out failure at the girth gear set-up. The self-alignment is made possible by a crowned toothing between the pinion and pinion shaft.

Mounted on the output disc, the central part of the MAX Drive System supports the grinding table, while a tilting-pad thrust bearing absorbs the static and dynamic grinding forces. With a design adapted from our well-proven MAAG® GEAR WPU and WPV gear units, the thrust bearing for the MAAG® GEAR MAX Drive System consists of thrust pads lined with Babbitt metal. The bearing is hydrostatically and hydrodynamically lubricated by high- and low-pressure oil pumps and the temperature is continuously monitored.

We use the latest machines and manufacturing processes, ensuring all parts are fit-for-use and free from defects. Our girth gears are made from fabricated steel, which produces a homogeneous crystal structure in the base material of the toothing, contributing to higher fatigue- and wear-resistance. Additionally, our in-house heat treatment eliminates internal stresses in the toothings. You can have confidence in the durability and reliability of the MAX Drive System and its components.

Our comprehensive documentation for the MAAG® GEAR product line allows us to supply spare parts for all gear units since 1926 – giving you confidence that your MAX Drive System will be in good repair for decades to come.


Manufacturing the complete drive system ensures the ideal adjustment between the main motors and all geared parts – and lets us efficiently customise the MAX Drive System to meet your specific requirements. The drive system is available as standard solution or can be customised to suit your unique operational needs.

The design of our MAX Drive System is based on our proven technology – with an eye towards the future and the high-powered needs of the ever-evolving cement industry.

Uncomplicated maximum power

Profit from the compact size

Smooth function and operational reliability

Simplified upkeep

Equal load distribution delivers high efficiency

Three-stage spur gear unit drive system with torque split

The complete MAX Drive System contains:
Two equal drive units, the girth gear unit, the oil unit, the maintenance drive, and a condition monitoring system.

Made up of two or four segments, the girth gear of the MAX Drive is a fabricated design and is manufactured to be more fatigue- and wear-resistant. The ring with the toothing is a high-quality alloy steel that is rolled and bent, while the rib is made out of ordinary carbon steel and welded to the ring.

The compact gearbox of our MAAG® GEAR MAX Drive System is powered by a vertical electric motor, adapted from a standard design to specifically fit this application. It is a squirrel cage asynchronous motor mounted directly on top of the gear casing, removing the need for any complicated onsite alignment.

In order to protect the girth gear from dust, we developed a new sealing concept that decouples the drives from the central part. A labyrinth seal, brush and dust protection shield are installed between the mill table and girth gear guard, along with rubber sealing to protect the central part and gear unit. These safeguards allow the drive system to run smoothly and decrease servicing.

Simple handling with the maintenance drive

The maintenance drive is integrated in one of the gear trains and allows you to rotate the mill table very slowly. This simplifies maintenance work at your vertical roller mill, including replacing lining plates or rebuilding surfaces through welding.

Reliably drive vertical roller mills with our fit-for-duty gear unit. The two series of our MAAG® GEAR WPU Gear Unit ensure that your vertical roller mill has the dependable drive system you need, whatever your required power range. With specifications to ensure safe operation in coal mills, our two-stage gearbox has you covered.

Our compact MAAG® GEAR WPU Bevel and Planetary Gearbox is your ticket to reliable power transmission in your vertical roller mill. With two series to suit your requirements, the MAAG® GEAR WPU Two-Stage Gear Unit is suitable for a wide-range of mills and arrangements. The large series accommodates power ranges from approximately 1,300 to 5,500 kW, while the small series is perfect for coal mills with a power ranges up to 1,500 kW.

Gear unit for all kinds of vertical roller mills – even coal mills

We developed the small series of MAAG® GEAR WPU Gear Units specifically for coal mills in cement, mineral and thermal power plants. The unique requirements of coal mills demand that the coal grinding system considers the heat sources used to dry raw coal, as well as the fire and explosion hazards of coal dust. To meet these demands, the entire grinding plant must be shock-resistant and have explosion relief valves.

If our MAAG® GEAR WPU Gearbox will be used in thermal power plant applications, we will follow the latest ATEX standards. We can also ensure that all electrical equipment installed on the WPU gear unit complies with anti-explosive requirements.

Our WPU Gear Units combine proven technology for driving vertical roller mills with the necessary adjustments to deliver high functionality for coal mills in cement plants and other applications. The standardised design of the WPU Gear Unit allows you to use it in many different types of mills and plant arrangements, while benefiting from the improvements to vibration dampening and ability to handle variable load operation.

Our conventional two-stage gear unit, the MAAG® GEAR WPU, fits perfectly in the classic vertical roller mill drive arrangement, where a horizontally-oriented electrical motor provides the drive power and rotary motion. The first reduction stage in the gear unit, the bevel stage, redirects the horizontal rotation into the vertical axes of the mill and is followed by a planetary gear stage, according to your torque and ratio requirements.

We use the ring gear of the planetary stage directly as part of the casing in the larger series of our MAAG® GEAR gear units. This minimises the ratio in the bevel gear stage, increasing the transmittable torque to a maximum.

The profile and longitudinal modifications of the toothed flanks of the sun pinion fully compensate for deformations of the pinions, wheels and gears while under load. This method guarantees optimum tooth flank contact and combines with the high toothing quality in the MAAG® GEAR WPU to deliver efficient power output and smooth operation – and ensure gear unit longevity.

The thrust bearing, which supports the mill table of your vertical roller mill, absorbs the static and dynamic loads from the grinding process. Each bearing pad is lubricated with low-pressure oil and the pads are lined with Babbitt metal at the contact surface. Subject to your needs for the grinding process, our WPU Gear Units also include high-pressure lubrication for hydrostatic table support. Depending the size and application, we can supply both gear stages with slide bearings or roller bearings.

The gear casing for the MAAG® GEAR WPU Gearbox is robust welded or cast steel. Additionally, the casing’s even, circular shape guarantees an optimal force flow from the mill table into the foundation of your vertical roller mill.

Reduced energy losses and lower cost

 Optimal longevity, reliability and performance

Get the most from this effective gear unit with auxiliary system

A broad collection of auxiliary systems completes our MAAG® GEAR WPU Gear Unit. While the lubrication system and coupling are must-haves for operating the gear unit, we can supply auxiliary or maintenance drives according your plant arrangement and maintenance philosophy. Our comprehensive online monitoring system ensures you get the most out of your vertical roller mill – and lets you efficiently plan maintenance.

Lubrication keeps the gear unit running smoothly

The oil supply units for our MAAG® GEAR WPU Gear Unit include low-pressure pumps that supply filtered and cooled lubrication oil to the bearings and toothings. If required, high-pressure pumps deliver oil to the thrust bearing from a separate compartment of the tank, using filtered oil from the low-pressure section. Using only clean oil on the high-pressure side improves the lifespan of the pumps and decreases the frequency of required maintenance.

The flexible coupling that comes standard with the WPU Gear Unit is almost maintenance free, as it requires no lubrication changes. It also has low vibratory loads in the drive train and relatively wide ranges for axial and radial misalignment. These features combine to give you reliable function, with low operating costs.

A maintenance or auxiliary drive that is tailored to your requirements rounds out the scope of supply for your WPU gear unit. The maintenance drive is placed between the motor and gear unit and allows you to rotate the mill table very slowly. This simplifies maintenance work at your vertical roller mill, including replacing lining plates or rebuilding surfaces through welding.

The auxiliary unit is mostly used to start the mill when the breakaway torque is too substantial to start the motor directly. The fluid coupling of the auxiliary unit guarantees smooth acceleration and the overrunning clutch automatically disengages the auxiliary drive after the main motor starts.