NKE bearings for industrial gearboxes

1. Version 01.2014 NKE bearings for industrial gearboxes > Versatile solutions for demanding applications

2. Content • Overview – NKE AUSTRIA • Bearing solutions for industrial gearboxes • Professional service support • Application examples for NKE bearings in gearboxes • Reference list – mechanical drive technology

3. Established in 1996 in Steyr, Austria by a group of senior people from former Steyr Wälzlager GmbH Today, a significant alternative for bearings in the premium class We develop, design, manufacture and market high-quality standard and special bearings for industrial applications NKE AUSTRIA – Overview Key facts (10.2014): • ~ 150 employees • 25 million Euro annual sales • 15 international sales offices • 240 distribution partners • Customers in more than 60 countries

4. Bearing solutions for industrial gearboxes • Bearings in industrial gearboxes must withstand arduous duty • Many factors have to be considered when designing a drive system, e.g. loads, speeds, torque, installation space • Suitable bearings play a decisive role in industrial gearboxes. • NKE offers: • creative, technical and commercial solutions • good availability / short delivery time • Numerous customers rely on NKE as a competent partner for bearings

5. NKE standard bearings • Wide range of standard bearings either from stock or with short lead-time • Internationally standardised – excellent availability, economical, 100% interchangeable with leading brands • Covers most industrial applications

6. Suitable bearings for your drive system • Depending on the requirements different types of bearings are used in different locations of a gearbox, e.g. in a planetary gearbox of a wind turbine (DE): Four-point contact ball bearing Cylindrical roller bearing Tapered roller bearings Full complement cylindrical roller bearings(without cage) Special cylindrical roller bearings

7. Cylindrical roller bearings • Suitable for high radial loads and medium to high speeds • In floating arrangements • Compact designs: • Single-row (N, NJ, NU und NUP) • Double-row (NN und NNU)   • Cage variants: • Brass (M6, MA6, MPA) • Polyamide (TVP3)  

8. Full complement cylindrical roller bearings • Without cage  maximum possible number of rollers in an available space • Suitable for very high radial loads • Low speed • Black oxide coating possible (SQ94D)

9. Fa Fr ≥ 1,27 Four-point contact ball bearings • Typically unrestrained in radial direction to accomodate thrust loads only • Radial loads permissible, provided that:

10. Tapered roller bearings • Suitable for high radial loads as well as thrust loads in one direction • When paired, suitable for thrust loads in both directions • Custom designs possible

11. Special cylindrical roller bearings • Special specifications: • optimised component geometry • surface treatment / coating • Custom designs • Ready-to-mount units • … etc.

12. Other types of bearings: For smaller gearboxes NKE deep groove ball bearings and angular contact ball bearings are also used. Deep groove ball bearing • Popular, economical • Suitable for very high rotating speeds • Various seals and grease variants available for different operating conditions Angular contact ball bearing • Suitable for high speed operation • Able to accommodate both radial and thrust loads

13. Professional service support • Equipped with experience and know-how, our teams work closely together with our customers. Our services include: • Application consultancy • Technical calculation • Certification support • Product development, design support • Training

14. Application examples of NKE bearings in gearboxes

15. Reference – Mining equipment (AT) 1/2 • The customer is one of the largest manufacturers of mining equipment worldwide. NKE supplies bearings to the production site in Austria for many years. • Application: • Spur-gear stage of a planetary gear • Requirements: • Shock resistance • High reliability • Long service life • NKE solution:  • Optimised tapered roller bearings

16. Reference – Mining equipment (AT) 2/2 • Application: • Angle drive for mining equipment • Bearing types: • Angular contact ball bearings7318-BE-CB-MP • Cylindrical roller bearing NJ224-E-M6 • Requirements: • Shock resistance • High reliability • Long service life • NKE solution: • Bearings with solid brass cage and special adaptation

17. Reference: Gearbox manufacturer (DE) • The company in Bremen, Germany, produces gearboxes and gear parts for mechanical engineering • NKE bearings are used in different applications

18. Reference: Manufacturer of geared motors (DE) • The company in Bavaria, Germany, develops and produces innovative drive solutions. • Application: • Geared hub motor • Assignment: • Developing a bearing arrangement for a compact and maintenance free low-profile geared hub motor • NKE solution: • By integrating adjacent parts into the special bearing, a space saving and economic solution has been realised

19. Reference: Steering and drive system for forklifts (DE) • The company develops, produces and services driveline and chassis technologies around the world. NKE supplies bearings to their production sites in Germany and Austria. • Application: • Wheel bearing of a steering and drive system for forklifts • Requirement: • Development of a robust and compact bearing arrangement which has to achieve the minimum service life time under consideration of variable loads and changing drive wheel diameter • NKE solution: • A double row tapered roller bearing has been especially modified for a compact yet rigid bearing arrangement within a very limited space.

20. Reference: Gearbox manufacturer (CZ) • The company group is a significant manufacturer of mechanical gear units suitable for various applications. The gearbox for the world’s first commercial tidal current turbine was manufacturered by the company. • Application: • Gearbox of tidal current turbine SEAGEN • NKE bearings: • DGBBs, TRBs, CRBs and four-point contact bearings with outer diameters from 300 to 1090 mm

21. Reference: Gearbox manufacturer (DE) • The customer is an innovative company in developing and production of gearboxes for all industrial applications. • Application: • Planetary bearings for 1.5MW wind turbine • Requirement: • Long service life • High reliability • NKE bearing type: • Cylindrical roller bearingNJ2324-E-MA6

22. Reference: Railway service provider (GB) • The customer provides services to major UK railways • Application: • Axle drive for railway vehicles • Problem: • Supply bottleneck • Frequent gearbox damages • Assignment: • Improving bearing performance • Enhancing of logistic performance • Reducing total costs

23. Reference: Railway service provider (GB) …Cont’d • NKE solution: • Bearings with restricted tolerances • Consignment stock → yields 100% availability • Long-term contract → cost savings, improved logistics • Bearing types: • Angular contact ball bearings • Cylindrical roller bearings • Tapered roller bearings • Results: • No more gear box damages due to bearing related issues (4+ years) • Complete conversion to NKE products • No more logistic problems

24. Reference: Railway service provider (GB)…Cont’d

25. Reference list: mechanical drive technology