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.

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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

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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 

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 

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

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.

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

Service centered

Preventive Maintenance

Overhaul

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

Service and Aftermarket

Keep your mill or kiln up and running with our heavy-duty girth gears. Heavy-duty comminution requires heavy-duty equipment – and our MAAG® GEAR Girth Gears are up to the task. Manufactured using state-of-the-art processes and high-quality source materials, our line of girth gears is fit-for-purpose and for a lifetime – ensuring long-lasting, high-performance for your mill or kiln.

Our comprehensive expertise in forged gear ring technology comes from our more than 50 years of experience, as well as our collaborations with leading mill suppliers and technical universities. As a member of the American Gear Manufacturers Association (AGMA), we are actively involved in defining the standards for gear-rating calculations, service factors and other design standards. We continuously invest in technology and knowledge – along with steadily strengthening our network of partners.

Over 1,000 MAAG® GEAR Girth Gears are in service around the world – delivering optimal reliability for the cement and mineral industries. Applications for our girth gears also extend into the chemical processing and ceramic industries, food processing and pulp and paper.

Our girth gears let you get the best from your mill or kiln

We build our fabricated girth gears using forged gear rim material and bodies made in an electro-welded structure. Compared to girth gears with cast base material, the manufacturing process is more sophisticated, as well as more reliable. The uniform and homogenous crystal structure of the forged rims, guarantees identical material properties throughout the entire toothing. Casting defects like hot tears, porosity or shrinkage are excluded – resulting in a stronger and more reliable girth gear.

When supplying ductile cast iron or cast-iron girth gears, we source the raw material from world-leading foundries – working closely with them to ensure the highest quality.

Our cutting-edge production method ensures that our girth gears deliver optimal power and stable operation for your mill or kiln, along with high wear resistance and long operating time. There are five steps to our manufacturing process for fabricated girth gears, including strict quality checks after the final welding and tooth cutting:

To start, high-grade material is rolled and forged to the required ring dimension. Web, rips and junction plates are welded to the forged rim material according to specific qualified processes. Components undergo strict non-destructive tests, followed by post-weld heat treatment. Rough and finish cuttings trim the girth gear to its final dimension. Finally, the tooth geometry, run outs, hardness and many other properties are measured and documented as part of the closing inspection.

Made for your requirements today and tomorrow

Working to your precise needs, our highly-experienced engineers use the latest finite elements modelling software to design and engineer girth gears that fit your specifications. Our modern production sites and continuous advancements ensure that our MAAG® GEAR Girth Gears meet your needs now – and into the future.

Long-lasting, heavy-duty girth gears

Expert customisations

No risk of inclusions and other irregularities

Well-thought-out, well-produced girth gears for your mill or kiln

The strength of our heavy-duty MAAG® GEAR Girth Gears comes from the strength of our source materials and manufacturing process. We use fabricated steel, forged rings, rolled plates and ductile (nodular) cast iron to ensure the smooth operations for your mill or kiln. The continuous investment in our modern machine shops guarantees state-of-the-art girth gear production, in a wide-range of sizing:

External gears: Maximum diameter: 11,200 mm; Face width: 1,250 mm; Maximum module: 45 by hobbing

Internal gears: Maximum diameter: 6,500 mm; Face width: 400 mm; Maximum module: 25.4

The precision and quality of the girth gear manufacturing process ensures accurate alignment – resulting in heavy-duty gears that keep your comminution equipment running smoothly now and in the future.

Ball and grinding mills, kilns and dryers are all operated with girth gears – but the girth gear is only one part of the power train. Taking into account the requirements of your application, available space and other individual parameters, our girth gears power your equipment together with pinions and intermediate gear units, lateral gear drives or, in the case of the MAAG® GEAR MAX Drive, with two spur gear drive units.

The classic open gear arrangement includes the main motor, an intermediate gear unit for speed reduction and the pinion, which meshes with the girth gear. Our standardised product range and individually-designed girth gears and pinions allow us to supply a customised power train – purpose-built for your specific application.

If you have higher power needs and limited space, our MAAG® GEAR LGDX lateral gear drive is the preferred solution. The symmetrical casing of our LGDX gear drive gives you high flexibility with positioning – letting you install the drive train at the best location within your mill. By delivering the lateral gear drive together with the girth gear, we ensure that both components match perfectly.

Our girth gears have a key role in meeting the highest power demands in vertical rollers mills. The MAX Drive powers vertical roller mills up to 15,000 kW with two spur gear drive units that mesh with the girth gear under the mill table.

While our modern manufacturing processes are impressive, it’s really our highly-skilled engineers and operators who make our girth gears stellar. Our engineers and machine operators are trained in sophisticated engineering software, allowing them to meet your precise specifications by creating high-quality girth gears made from a variety of materials. Depending on your needs, we can manufacture all geared components of the entire power train or individual components.

Based on engineering analysis and many years of experience, we can also propose design improvements to increase part reliability – delivering smooth operations for your mill or kiln long into the future.

Downloads

Crush your grinding challenges with our single and multistage gear units. Designed to drive comminution machinery in minerals processing, our MAAG® GEAR WA and Temperex Gearbox delivers impressive performance and reliability for your horizonal mill. The single stage MAAG® GEAR WA and multistage MAAG® GEAR Temperex Speed Reducers meet your crushing needs rationally and economically.

Drawing on more than 100 years of experience with heavy-duty industrial gear units and state-of-the-art manufacturing processes and calculation methods, our MAAG® GEAR WA / Temperex gear unit brings impressive performance and reliability to your horizonal mill. A parallel cylindrical wheel speed reducer gear unit, our single stage MAAG® GEAR WA and the multistage MAAG® GEAR Temperex meet your precise needs for comminution or other applications.

Reliable comminution speed reducer gear unit for your horizontal mill

Consistent drive for crushing, adapted to your requirements

We designed the MAAG® GEAR WA / Temperex Gear Units specifically for driving comminution machinery in minerals processing. These single and multistage gear units effectively transmit torque from electric driver motors to ball, rod, SAG, AG or other types of horizonal mills – giving you dependable power output that works in your heavy-duty application.

With the potential to accommodate the widest possible range of requirements, the broad scope and modular design of the MAAG® GEAR WA / Temperex Gear Unit ensure that you get the crushing solution that perfectly fits your application and unique circumstances. Beyond the wide range of power and size configurations, we can also deliver other designs on request – and our engineers can work with you to guarantee your solution is adapted to the power you require, as well as the speed of your motor and mill.

The standard version of the MAAG® GEAR WA / Temperex works within an ambient temperature range of -4 °C to +40 °C. We can also adapt the design and installation configuration for other ambient temperature ranges, depending on your needs.

Our advanced manufacturing processes ensure the high strength and wear resistance of our MAAG® WA / Temperex gear unit – delivering durability right from the very beginning. Recognising the heavy-duty demands of the mineral processing industry, we make sure our gear units are up to the challenge with the latest developments in heat treatment and teeth machining. And our precise machines and strict control process ensure high-quality production at every step.

The toothed components are produced in-house to the strictest quality standards, using case-hardened and heat-treated steel. This in-house heat treatment gives us complete control over the hardening processes and material properties – and gives you confidence in the long-lasting performance of the MAAG® GEAR WA / Temperex Gear Unit.

The gears in the MAAG® GEAR Temperex range are made of chrome-nickel molybdenum steel and case-hardened and ground on precision tool machines. The modified tooth profiles of the cylindrical helical gears used in our Temerpex Gear Units limit scuffing or scoring – and provide better load distribution.

Proven durability by design and manufacturing

Minimal maintenance and high uptime

Customisable for your individual mill requirements

Gear units designed and built for unfailing speed reduction

The well-manufactured parts and high-quality materials we use for our MAAG® GEAR WA / Temperex Gear Units contribute to their reliable function and simplified maintenance. We also offer upgrades and additional equipment to meet your mineral processing needs.

The complete WA / Temperex mill drive system includes the

motor, gear unit, lubrication system, auxiliary drive, girth gear and pinion.

The standard installation of the MAAG® GEAR WA / Temperex Gear Unit includes a flexible coupling for the high-speed shaft and a toothed coupling for the low-speed shaft, delivering low vibratory loads in the drive train and a relatively wide range for axial and radial displacement. The couplings have no lubricants that need changing – resulting in reliable virtually maintenance-free operation.

All gear wheels in the WA gear unit are made of case-hardened steel, delivering exceptional wear resistance for the teeth, while allowing light, compact gearbox construction. Our in-house heat treatment and precise teeth machining result in optimal tooth contact under load condition and the toothing of the helical stage includes all necessary modifications to ensure smooth meshing.

Depending on the type of load transmission our WA / Temperex Speed Reducers are equipped with spherical or tapered cylindrical roller bearings. In order to minimise maintenance and keep your horizontal mill running smoothly, the bearings in all of our industrial gear units are covered and protected against dust and other possible contaminations, using a combination of lip and labyrinth seals designed for mineral lube oils.

The standard version of our WA / Temperex Gear Unit includes resistance thermometers to monitor the bearings and oil temperature. The instrumentation can be upgraded to a vibration monitoring system as an additional option.

You can upgrade your speed reducer gear unit to allow condition-based preventive maintenance – letting you detect faults at a very early stage and plan future service interventions.

Auxiliary drive for cost-effective maintenance

Fitted behind the electric motor or on the free high-speed shaft end of the gear unit, the auxiliary drive of our MAAG® GEAR WA / Temperex Gear Unit gives you a cost-effective way to perform maintenance. Use the auxiliary drive to simplify build-up welding on your mill or to conveniently re-position the mill during maintenance. Connected to the gearbox or electric motor via an automatic overrunning clutch, the auxiliary drive has a Kirk key interlocking system to prevent it from working simultaneously with the main motor.

Improve your open gears with reliable pinions that function smoothly Manufactured with maximum precision, our gear pinions are customised for your mill and kiln drive application and designed to work harmoniously with girth gears – delivering smooth, reliable operations.

We’ve spent decades refining the design and manufacturing of our gear pinions to ensure that they work hand-in-hand with girth gears. Custom-made to meet your specific requirements, our pinions use the perfect combination of material, hardness and finishing – contributing to the long service life of your open gear. By continuously investing in technology and knowledge, we deliver improved pinion technology – meeting your needs today and tomorrow. Pinions are as varied as their applications. Our pinion designs include: 

Self-aligning, Spur, helical or double helical, Bored and integral, Forged alloyed steel, Through-hardened, quenched and tempered, Carburised and ground, Induction-hardened, and Nitrided.

Tailor-made pinions that round up your open gears

Engineered for success in your open gears

Our teams of engineers carefully consider how to implement the required tooth flank modifications for the gearing of various pinions with new installations. These considerations include profile and lead correction – ensuring that our gear pinions are fit-for-purpose and deliver maximum output with minimal noise disruption. Through precise manufacturing techniques, we implement profile and longitudinal modifications for pinions as required by your mill or kiln drives. We can also re-engineer pinions that are already installed. If you need to replace existing pinions with ones that have a higher performance or different speed, we know how to optimise the new gearing to meet your new requirements.

As we have developed, improved and patented several heat treatment processes, we can safely call ourselves leaders in the field of heat treatment. Our modern heat treatment facilities ensure the best material quality and characteristics, producing dependable top-notch pinions. Stringent quality control procedures throughout our manufacturing processes let you rely on our gear products. We use strict testing methods including NON-destructive, ultrasonic, magnetic particle and penetrant testing along with NDT-QA inspection to guarantee faultless parts. Our gear components comply with applicable international standards including: UNI EN ISO, AWS, ASTM, ASME, and DIN.

Working to your precise needs, our highly-experienced engineers use the latest finite elements modelling software to design and engineer pinions for open gears that fit your specifications. Our modern production sites and continuous advancements ensure that our pinions meet your needs now – and into the future.

Long service life

The diversity to fullfill your demands

Made to order – and to match your needs

Well-designed, well-made pinions – tailored for your mill and kiln

We continually invest in our modern production sites to guarantee our gear pinions use the latest manufacturing techniques. By leading the field in advancements such as heat treatment, we ensure durable components that stand up to your heavy-duty needs.


Ball and grinding mills, kilns and dryers are often operated with open gears. Based on your application, available space and other individual parameters, our gear solutions power your equipment – getting the highest performance from your process. The classic open gear arrangement includes the main motor, an intermediate gear unit for speed reduction and the pinion, which meshes with the girth gear. Our standardised product range, in combination with individually-designed girth gears and pinions, allows us to supply a customised power train for your specific application. 

Pinions are available in a solid, on-shaft design, where the gearing is integrated as part of the shaft, or as bored, assembled pinion with shaft. The latter permits a higher-grade material for just the gearing area – letting us optimise the pinion to meet your unique needs. We recommend using self-aligning pinions for high-torque transmission situations. The spherical bearing used between the shaft and the bored pinion allows the toothing to slightly swing – enabling the self-aligning pinions to compensate for minor run-out deviations of your mill or kiln. To guarantee the correct match in hardness between pinion and girth gear, we take into account the meshing assembly and modify the carburising and case-hardening process accordingly. We produce wear-resistant components with the maximum lifespan for both pinions and girth gears.

While our modern manufacturing processes are impressive, it’s really our highly-skilled engineers and operators who make our pinions top-class. Our engineers and machine operators are trained in sophisticated engineering software, allowing them to create high-quality open gears made from different materials that meet your precise specifications. We can manufacture all geared components of the entire power train or individual components depending your needs. Based on engineering analysis and many years of experience, we can also propose design improvements to increase part reliability – delivering smooth operations for your mill or kiln long into the future.


A lubrication system designed for high-viscosity grease. High-viscosity grease is better for your MAAG® girth gear, but hard on your lube pump. That’s why we’ve developed a new air/grease lubrication system designed to handle high viscosity grease at low velocities – ensuring your girth gear is cared for and your bills stay low.

Lubrication is essential to the working of your gear unit. But not all lubricants are created equal. New, high-viscosity greases are transforming the efficiency and life expectancy of gear parts – but to make the most of these new greases, you need a lube pump that’s up to the task. The MAAG GGL girth gear lubrication system was designed to meet this need. It’s a spray lubrication system that provides the required lubricant quantity in every working condition, saving on lubricant use and therefore reducing costs and environmental impact. It is designed to cope well with high viscosity lubricants, while maintaining the ability to work at low velocities – so you’re only ever using as much grease as you need.

Efficient and precise – MAAG® GGL girth gear lubrication system

Precise, efficient application

No blockages or build-up

Prolongs the life of your MAAG® girth gear

Improved thermal footprint

Your high-viscosity, low-velocity lubrication system

As standard, your girth gear lubrication system includes:

Special Electra pump - a proprietary electrical tri-phase pump for 180 kg tank, including photoelectric distance sensor for minimum-maximum/superminimum grease level in tank Air group for spray valves: with electro valve, pressure switch and filter for pressure regulation and electro valve bypass Grease distribution panel with cover sealing system, ventilated heater with thermostat (15 – 20°C local temperature), and electrical pressure switch (2 signal on/off) Adjustable sprayers. The number of sprayers will be defined according to the application Larger pipe diameter (13 mm internal) Three pre-set phases, exact values to be defined

The sprayers can be adjusted in two directions to ensure the best possible positioning and an even coating of lubrication across the gear. The grease distribution panel includes an electrical pressure switch that enables you to check the exact air working pressure, not just the system pressure.

Using air to propel the grease gives us an easy means of cleaning and emptying the nozzle to prevent build-up and blockages.

The new lubrication pump uses pipes measuring 13 mm internal diameter. This increased opening enables smoother flow of the high-viscosity grease through the pipe.

The Special Electra pump comes equipped with three preset phases, making it easy to switch between start-up, normal running conditions, and emergency settings at the touch of a button.

The MAAG GGL girth gear lubrication system will be designed to fit precisely within the footprint of your existing girth gear for easy, drop-in installation.