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Drive Technology

Drive technology encompasses a wide range of applications – from low technical requirements to complex systems which demand maximum reliability in service, such as wind turbine gears. Operating conditions vary too. For example, conveyor belts are usually subject to a constant load, while other types of machinery like cement mills have to cope with widely fluctuating loads.

As a bearing specialist, NSK can offer you the ideal solution to meet any challenge, tailored precisely to the technical requirements of your application – from tiny bearings that have to withstand high acceleration (e.g. for electric motors and generators) to giant bearings designed to deal with dirty environments and shock loads.
As well as catering for specific industries, bearings from NSK are made from quality materials, offer outstanding precision and have very long service lives. This prevents unnecessary and unplanned plant downtime.

Operating conditions: high shock loads

Industrial gearboxes are used in many different sectors and often face dynamic operating conditions twinned with high shock loads in some cases. They are usually located between the drive on one side and the process technology on the other. In this case, industrial gearboxes  primarily serve to reduce input speeds and increase torques for the processes in question. Typical applications include power generation and mining.

All industrial gearboxes have to function reliably in spite of the dynamic processes acting on them. As higher-performance machines keep emerging, the bearings used for shafts also play a crucial role in ensuring reliability in service. These are also tailored specifically to the relevant application.

For instance, NSK supplies solutions for every stage of the planetary gears used for wind turbines, from the planetary carrier to the generator shaft. Various options are available: traditional locating/non-locating bearings, floating bearings and adjusted bearing arrangements. The choice of material is another key consideration. NSK’s Super-TF technology maximises bearings’ service life, even in operating conditions where conventional bearings would show signs of fatigue damage. If it is also possible to change operating conditions for the better, the components can last several times longer than standard bearings.

High Load Capacity Cylindrical Roller Bearings

Two key innovations extend the lives of heavy-duty cylindrical roller bearings by up to 30%. Firstly, an increase in the number of rollers reduces the surface pressure on the contact area between the rollers and the raceway, thereby increasing the maximum load. Secondly, an optimised cage provides sufficient stability despite the larger number of rolling elements.

Our innovations: 
The TF series of bearings 
Electrically insulated bearings with a ceramic coating
NSKHPS Spherical Roller Bearings

Siemens MultiDrive

Operating conditions: constant torques plus changing speeds

Electric motors and generators place completely different demands on bearings compared to gears. Knocks and fluctuating torques rarely occur. Different speeds are usually the key consideration when it comes to selecting bearings.

Performance classes vary, however. Electric motors and generators in the consumer segment – such as drive motors for washing machines or car alternators – usually have to fit in a very small space and tend to operate under constant conditions. Motors and generators with a higher power density are normally used in industrial plants or to produce power, where considerable load variations are commonplace.

In electric motors and generators, the shaft bearing often has to be insulated from the housing to prevent damage caused by current conduction. With this in mind,  NSK has developed electrically insulated bearings with a ceramic coating which are suitable for the conditions associated with these specific mechatronic applications.
NSK can supply the right bearings for all operating conditions and applications, such as extremely compact deep-groove ball bearings which deliver ultra-quiet running along with optimised low energy consumption and require no maintenance.

Electrically insulated bearings with a ceramic coating

Some applications are prone to causing bearing damage and premature failure due to electrical corrosion. Electrical corrosion is damage to the raceway resulting from electrical discharges between the rolling elements and the raceway. With its electrically insulated bearings, NSK offers a special product with high insulation resistance to deal with this problem. The bearings’ rings are coated with a layer of ceramic which has a set thickness. This is applied using a special spraying technique designed to ensure that the coating bonds securely to the bearing steel.

Our innovations: 
The HR series of deep-groove ball bearings  
Hybrid bearings with ceramic balls

NSKHPS Series Roller Bearings

NSKHPS series or high performance standard uses state of the art material technology bearings, offering high speed & load ratings.  >>

High Load Capacity Cylindrical Roller Bearing

Developed for gearboxes in large industrial machinery. >>

High Capacity - HR Series

Larger rolling elements increase the dynamic load rating - helping improve machinery life performance.  >>

Ceramic-Coated Ball Bearings

Optimal for applications that are susceptible to bearing damage and failures due to electrical corrosion  >>

Hybrid Bearings with Ceramic Balls

  • Troubleshooting

    Don't let your bearings fail prematurely or unexpectedly. Save yourself trouble and money with the NSK troubleshooting tools. >>

  • Technical Tools

    Keep your bearings in good shape with NSK's technical tools, including the NSK Calculation Tools and CAD Drawings. >>

  • Technical Enquiry

    Looking for a new solution? Fill out the technical enquiry form and one of the NSK technical team members will provide assistance as soon as possible. >>

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