Generation X.e helical gear units / bevel-helical gear units

With 23 finely graduated sizes, the helical and bevel-helical gear units of the X..e series cover the torque range from 7.2 to 500 kNm. The extensive modular program and the large number of predefined additional equipment and options offer a high degree of flexibility for adaptation to the application situation. Regardless of whether you are a plant manufacturer or operator - the X..e series offers the right solution for every requirement.

One standard product – numerous possibilities

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Performance enhancement - Generation X.e goes one step further
Performance enhancement - Generation X.e goes one step further

For operators or original equipment manufacturers of machines and plants, it is crucial that the drives used there are robust, reliable and easy to maintain. The industrial gear units of the X..e series efficiently meet these requirements.

The intelligent, universal gear unit concept impresses with its fine size graduation, high installation variability and the large number of additional modular features and options such as motor adapters, backstop, various sealing and shaft systems, and many more. The wide ratio range of 6.3 - 450 and the robust design make the All-Rounder the right choice in many industries and applications. Whether crane, conveyor belt or mixer - with the X..e series and the industry know-how of SEW-EURODRIVE, you are opting for maximum availability and a reliable partner. And if our modular system does not have the right solution for you, we will customize our gear units for you.

X.e goes one step further...

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With the performance increase, Generation X.e expands the previous limits of industrial helical and bevel helical gear units, offering new possibilities in the areas of performance, safety and efficiency.

The modular Generation X.e system – benefits for you

  • Global availability
  • Delivery times
  • Detailed calculation
  • Condition monitoring
  • GearOil by SEW-EURODRIVE
  • Drive package / system components

Global availability

  • 4 manufacturing and 13 assembly plants ensure global availability of the X..e series
  • Additional service centers ensure the service capability of the X..e series

Delivery times

  • Short delivery times, even in the case of customized adaptations.
  • Even in the event of a plant shutdown, a replacement gearbox can be delivered in a short time.

Detailed calculation

  • Thanks to the networked calculation landscape, each drive is simulated and calculated with the individually required drive data.
  • The intensive research and testing at SEW-EURODRIVE makes it possible to use the latest calculation models and calculation methods advantageously in series products at an early stage.

Condition monitoring

  • The DriveRadar® IoT Suite monitors the drive and automatically notifies in case of critical condition changes.
  • The system calculates the remaining service life of the bearings, gears and oil and predicts incipient damage at an early stage.


  • Boosts gear unit performance
  • Reduces rolling and sliding friction
  • Improves efficiency and wear resistance
  • Eliminates the need for an initial oil change after 500 hours of operation

Drive package / system components

You benefit from a perfectly coordinated overall package offering the best value for money, with SEW-EURODRIVE solving your drive task from start to finish. To provide this service, we collaborate with renowned manufacturers to expand our product portfolio.

Your advantages

  • Power

    Increase in nominal torques even with additional external loads for a reduction in size. Result: lower investment costs and smaller installation space in the plant.
  • Safety

    Installation individual rolling bearings with short delivery times such as thermal design according to simulated ambient conditions. Result: less maintenance intervals and higher plant availability.
  • Efficiency

    A sustainable drive solution thanks to extensive adaptation and optimization options. Result: reduced power loss, lower oil demand, and lower total cost of ownership.

This is what makes Generation X.e unique:

Our decades of experience in the construction of large gear units have prompted us to selectively revise the X series. Find out below which innovations make the X.e generation so unique and how the intelligent combination of the implemented measures and the calculation by networked software tools enables you to obtain an exactly fitting gear unit.

This is what makes Generation X.e unique:

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Assembly of a Generation X.e industrial gear unit

Our decades of experience in the construction of large gear units have prompted us to selectively revise the X series.

See in this video which innovations make Generation X.e so unique. Learn how you benefit from the product optimizations and how the targeted modification of the product properties leads to a customized solution for them.

Red gear unit graphic depicted as a concept study against a dark gray backgroundT
  • Contactless sealing systems
  • Thermally improved oil level
  • Optimized bearing preload
  • Optimized gearing topology
  • Improved bevel pinion housing
  • Universal fan guard

Contactless sealing systems


  • No wear on the input or output shaft
  • No oil losses

Benefits for you:

  • Greater operational reliability
  • Significantly longer maintenance intervals for your drive system

Thermally improved oil level


  • Establishing the right balance between lowering the oil level and optimizing heat transfer
  • Ideal reduction of the oil bath temperature

Benefits for you:

  • Improved operational reliability
  • Oil volume savings
  • An extended oil service life means longer intervals between oil changes
  • Reduced churning losses
  • Increased thermal limit rating

Optimized bearing preload


  • Always the right bearing preload for a particular order
  • Reduced formation of heat spots
  • Low compression

Benefits for you:

  • Increased bearing service life for your industrial gear unit
  • Increased thermal limit rating

Optimized gearing topology


  • Gearing topology resistant to displacements
  • Better tolerance of meshing problems
  • Avoidance of downtimes
  • Increased system availability

Benefits for you:

  • Greater operational reliability of the industrial gear unit when external forces act on the shafts
  • New calculation landscape combined with optimized gearing topology
  • Increased static overhung loads at an unfavorable application angle
  • Lower gear unit noise thanks to optimized tooth meshing

Improved bevel pinion housing


  • Optimized oil flow for greater operational reliability
  • Increased thermal limit rating
  • Supports increased power transmission without unexpected machine downtimes

Benefits for you:

  • Greater operational reliability and improved cold start behavior
  • Increased overall limit rating

Universal fan guard


  • One guard can accommodate various fan sizes and types
  • Fixed installation dimensions in your system
  • Optimum cooling in compliance with the specified sound pressure limits

Benefits for you:

  • Reduced oil bath temperature
  • Significant increase in the thermal limit rating
  • Lower sound pressure level

Generation X.e – efficient. experienced. excellent


Properties and features of the X..e series industrial gear units

  • Independent industrial gear unit platform with 23 sizes
  • Helical gear units and bevel-helical gear units
  • Single-piece and split gear unit housing
  • Invertible gear unit housing
  • Universal mounting positions
  • Distinctive modular technology
  • Diverse predefined optional equipment and options
  • Customer-specific adaptations possible

Technical data

Close table
Gear unit design Stages Gear ratio i Nominal torque MN2
Helical gear unit
X.F.100e – X.F.320e
2 to 4 stages 6.3 – 450 7.2 – 500
Bevel-helical gear unit
X.K.100e – X.K.320e
2 to 4 stages 6.3 – 450 7.2 – 500
Bevel-helical gear unit*
X.T.100e – X.T.250e
3 and 4 stages 12.5 – 450 7.2 – 185
  1. Drive shaft top or bottom
We have stored a table for you here.

Application-specific industrial gear units


Our helical and bevel-helical gear units are used wherever reliably high torques are required. The modular design with many additional features and options allows the X..e series to be individually adapted to your application-specific requirements.

In use worldwide:

  • Mining and open pit mining
  • Recycling industry
  • Crane technology
  • Water and wastewater technology
  • Steel industry
  • and many more

The modular Generation X.e system – benefits for you

  • SEW GearOil
    • Boosts gear unit performance
    • Reduces rolling and sliding friction
    • Improves efficiency and wear resistance
    • Eliminates the need for an initial oil change after 500 hours of operation
  • Delivery times
    • Short delivery times, even in the case of customized adaptations
    • Replacement parts required during servicing can also be supplied quickly
  • Global availability
    • With four production plants and 13 assembly plants across the globe, standardized industrial gear units can be supplied worldwide impressively fast
    • Additional service centers can also provide all kinds of service operations at short notice
  • Detailed calculation
    • Thanks to a networked calculation landscape, each and every drive is simulated in the software, with calculations based on specific drive data requirements.
    • Collaboration with research institutes means the latest calculation models can be used on series products.
  • Condition monitoring
    • The DriveRadar® IoT Suite monitors parameters such as vibration and temperature on the drive to pre-empt damage to bearings or gearing and temperature-related issues.
    • Preventive damage detection with notification option

What does a networked calculation landscape mean for you?

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The new networked calculation landscape provides the perfect support for the selective configuration of your gear unit. Our industry experts assist you during this process and can now take the highly specific operating conditions of your application into account.

They are able to do so because the new Generation X.e has been enhanced based specifically on the industry and application experience of both our experts and our customers from the mining, cement and port logistics industries. You, too, can systematically work your way toward ideal and highly efficient operating processes with our intelligent drive solution.

Want to avoid an initial oil change after 500 hours of operation? With our X.. series industrial gear units, yo

We have established a closely monitored running-in and cleaning process during production. In conjunction with our SEW GearOil lubricants and their unique additives, this means we can provide you with a drive package tailored to your application that will not require an early oil change.

More information about SEW GearOil.

We're happy to help.

If you have any further questions about our Generation X.e, simply complete the form below and send us a message.

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Lubricants for gear units

Our lubricants – the best possible protection for your gear unit.

Industrial gear units to go

Industrial gear units to go

"Assemble to order" gear units, which require no design adaptations, leave the factory just five days after receipt of the order.

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