Version 01 2014 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 Gmb. H § Today, a significant alternative for bearings in the premium class Key facts (10. 2014): § ~ 150 employees § 25 million Euro annual sales § § § 15 international sales offices 240 distribution partners Customers in more than 60 countries § We develop, design, manufacture and market highquality standard and special bearings for industrial applications

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 (M 6, MA 6, MPA) • Polyamide (TVP 3)

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 (SQ 94 D)

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

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 NJ 224 -E-M 6 § 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 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 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. 5 MW wind turbine § Requirement: • Long service life • High reliability § NKE bearing type: • Cylindrical roller bearing NJ 2324 -E-MA 6

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