NKE bearings for electrical machinery

1. Version 01.2014 NKE bearings for electrical machinery > Keep motors and generators running

2. Content • Overview – NKE AUSTRIA • Bearing solutions for electrical machinery • Professional service support • Application examples for NKE bearings in electrical machinery • Reference list – electrical machinery

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 employess • 25 million Euro annual sales • 15 international sales offices • 240 distribution partners • Customers in more than 60 countries

4. Bearing solutions for electrical machinery • Electric motors – driving force behind industries • Requirements for bearings for electric motors • low running noise • long service life • high load capacity • efficient seals • cost effectiveness • NKE supplies a broad range of bearings for electrical machinery, including motors and generators • 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. Cylindrical roller bearings • Commonly used in medium- to large-sized motors • Usually as non-locating bearings on the drive side • Suitable for high radial loads and medium to high speeds • Many design configurations • Single-row (N, NJ, NU and NUP) • Cage variants: • Brass (M6, MA6, MPA) • Polyamide (TVP3)  

7. Deep groove ball bearings • For locating and non-locating positions of small- to medium-sized motors and locating positions for larger motors • Suitable for high speeds and moderate radial and axial loads • Quiet and economical running • Open or ready for use – pre-lubricated with shields/seals

8. Electrically insulated bearings • Deep groove ball and cylindrical roller bearings • Prevent damage caused by the passage of electric current • 100% interchangeable with standard bearings • Insulation coating (oxide ceramic) on outer or inner ring – SQ77x

9. Angular contact ball bearings • Used as locating bearings in electric motors and generators with high thrust loads or vertical axis • High axial load capacity • High speed ratings • Single- or double-row, paired, various cage designs

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

11. Application examples of NKE bearings in electrical machinery

12. Reference: Electromotor manufacturer/metro (RU) • The customer is a leader in the Russian electric engineering industry. • NKE supplies electrically insulated bearings 6313-M-C3-SQ77 and NU313-E-M6-C3-SQ77 for electric traction motors; final customer: Metro (underground) in a Russian city.

13. Reference: Railway service provider (AT) • ÖBB Technische Services, a company of the ÖBB Group, is responsible for maintenance and modernization of rolling stock and vehicle components • NKE has been supplying different types of bearings for traction motors • NU324-E-MPA-R200&220-SQ77 • 6322-M-C5H-SQ77

14. Reference: Wind turbine generator manufacturer (CN) • Customer is a state-owned industrial enterprise located in central China • NKE was requested to support the customer in the bearing layout for a 1.5MW wind turbine generator. • Services provided: • Bearing evaluation, e.g. use of SQ77E • Bearing life calculation and auxiliary calculations, e.g. operational clearances, bearing preload, etc. • Layout of the lubrication system, e.g. grease type, grease guidance, etc. • Bearings supplied: 6330-M-C3-SQ77E

15. Reference: Electric motors (IT) • Customer is a renowned manufacturer of electrical drive technology based in northern Italy • NKE supplied insulated deep groove ball bearings for electric motors • 6314-M-C3-SQ77 • 6318-M-C3-SQ77 • 6322-M-C3-SQ77 • 6326-M-C3-SQ77

16. Reference: Railway service provider (GB) • The customer provides services to major UK railways • Application: • Traction motor for railway vehicles • Problem: • Frequent bearing failures on the non-locating side due to overheating • NKEsolution: • Elimination of glass fibre insulation • Modification of sealing system • Raising radial clearance to C4H • Introduction of electrically insulated bearings • Bearing types: • Cylindrical roller bearings • Results: • No bearing failures since conversion to NKE special bearings (5+ years)

17. Reference – Vibrator motor (GB) • The British company is specialised in electrical, pneumatic and hydraulic vibrator motors for material handling and processing industries • Application: • Vibration motor • Application Requirements: • Accommodation of oscillating loads • Resistance against vibrations • Accommodation of shaft bending • NKE solution: • Cylindrical roller bearings NJ2315-E-TVP3-C3 with optimised internal design

18. Reference – Geared hub motor (DE) • The customer is a German manufacturer of drive technology products including electric motors and gearboxes • 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 list: electrical machinery