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

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

NKE AUSTRIA – Overview 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 Key facts (10.2014): ~ 150 employees 25 million Euro annual sales 15 international sales offices 240 distribution partners Customers in more than 60 countries

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

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

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

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)  

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)

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

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

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

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

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

Application examples of NKE bearings in gearboxes

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

Reference – Mining equipment (AT) 2/2 Application: Angle drive for mining equipment Bearing types: Angular contact ball bearings 7318-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

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

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

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.

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

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 bearing NJ2324-E-MA6

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

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

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

Reference list: mechanical drive technology