THE TIMKEN COMPANY THE TIMKEN COMP

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1 THE TIMKEN COMPANY

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3 Timken design, manufacturing and engineering excellence provides an effective approach to wind energy products and services. Timken adds value by minimizing downtime and lengthening maintenance cycles. Timken service engineers have a reputation for being highly responsive to customer needs.

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5 knowledge The Timken Company is more than a leading global manufacturer of bearings and steel; our engineers provide specialized friction-management solutions and offer creative ways to enhance the performance and reliability of wind energy components. The foundation of our success is world-class research and development. Leveraging that expertise, Timken is well positioned to help you effectively design and maintain gear boxes, power trains and turbines. Timken offers comprehensive product knowledge in all bearing types. We are the world s largest manufacturer of tapered roller bearings and the third-largest producer of all bearing types. With the 2003 acquisition of The Torrington Company, another global bearing leader, Timken now offers a broader array of product types and sizes required to serve today s ever-changing wind energy industry. Timken also applies its deep-rooted knowledge in steel technology to metallurgical specifications for bearing products. We are a major producer of bearing steel, and our metallurgical knowledge is a core competency. Timken research engineers dedicate time to steel technology, knowing that clean steel and metallurgical composition play critical roles in overall system performance. Our steel is ladle refined to minimize inclusions in our bearing material. When you choose a Timken bearing, you can expect the highest quality starting from the raw material all the way to the finished product. Today, we maintain 90 manufacturing plants and 10 technology centers in 28 countries. No matter where Timken bearings are made, you are assured of receiving superior products that carry a distinguished mark of excellence. And every product we make is backed by a global sales and service network. Timken offers engineered solutions to maximize reliability within wind energy applications.

6 foundations in research The longevity and performance of Timken wind energy products is largely based on our strengths in research and advanced technology. Our sales and application engineers, collaborating with wind energy design engineers, transfer this knowledge into innovative, value-added product solutions that provide competitive advantages for our customers. In Timken laboratories, engineers test enabling technologies related to advanced materials, raceway surface conditioning and manufacturing to determine how these and other enhancements affect system performance. Our technical breakthroughs include: Engineered surfaces We have developed coatings and finishes that, when applied to bearing rollers and other surface-to-surface contact areas, enhance bearing fatigue life, corrosion resistance, speed capabilities and friction reduction. Debris solutions Bearing raceways are frequently required to operate in lubricants that are contaminated with large-particle debris emitted by gears and other sources. These large particles dent bearing raceways and typically reduce the fatigue life of standard bearings. Timken has developed specialized bearings that help withstand these effects to maintain gear box reliability. Lubrication options Our line of single-point lubricators is available to reduce service intervals and ensure that an adequate supply of fresh grease is delivered to the bearings at all times. A full line of Timken grease is also available, offering a variety of consistencies and additives to suit your specific application needs. Condition monitoring systems To effectively maintain operations, Timken offers condition monitoring devices that help indicate potential system failures before they happen. Timken DuraSpexx Power Rating Series bearings These bearings, manufactured using highly refined steel, provide twice the fatigue life of normal Timken bearings, making it easier for wind turbine design engineers to improve the power density of their projects. Along with offering our bearing and steel products to the wind energy industry, Timken also offers a wide range of technical services related to the design and evaluation of mechanical components, including tribology, metrology, failure analysis, mechanical design and application testing.

7 Integrated Planet Gear Bearing Assemblies Preset bearing reduces backlash variation among planets Finished gear faces maximize resistance to gear pitting fatigue Integrated design reduces wear, debris and unwanted clearances from race precession Suited for wind turbine gear boxes Tapered Double-Inner-Row Roller Bearing Pillow Blocks Integrated housing and bearing enhances lubrication and deters contamination Multiple sealing options available Tapered Roller Bearings for Locator Position Fixes location of parallel shafting in a compact axial space Applicable to systems equipped with helical and spur gearing Single-row construction improves bearing efficiency as much as 25 percent and supports all radial loading and bi-directional gear thrust Operates with 360-degree roller contact in positive torque powergeneration conditions, maintaining continual gear contact Flex Pin Bearings Integrated flex pin bending pattern improves load distribution among planets and stress distribution of the gear face Design promotes consistent deflection characteristics among adjacent planets Preset bearing clearance range eases installation in gear boxes MODULAR SINGLE STAGE Cylindrical Roller Bearings Common bearing design for supporting rotating planetary carrier Full complement of rolling elements to maximize radial capacity Bearing flanges support axial forces Rollers can be coated with ultra-hard surfaces to resist fretting corrosion Available in NU, NN, NJ, NF, NT and NP styles Self-Aligning Tapered Roller Bearing Pillow Blocks Preloaded tapered roller bearings minimize main shaft vibration and wear and deter false brinelling while the rotor is stationary Preloading substantially reduces main shaft axial movement, minimizing gear box thrusting Integral seal outlasts elastomer shaft seals and should not require replacement Can be retrofitted for today s wind turbine main shafts

8 Single-Row, Large-Diameter Tapered Bearings Supports all combinations of radial and thrust loading with true-rolling motion on the raceway contacts Separable inner and outer races ease assembly Internal clearance can be set at assembly to achieve optimum clearance or preload Cylindrical Roller Bearings (NU Design) Preferred bearing design for non-locating bearing positions Provides outstanding floating capability along the true-rolling-motion surfaces between raceways and rolling elements Design facilitates piloting and assembly Available in NCF, NN, NJ, NF, NT and NP styles Double-Row, Large-Diameter Tapered Bearings (TDI Design) Referred to as X arrangement or direct mounting Excellent selection for locating positions on main shafts and in gear boxes Supports all combinations of radial and thrust loading without inducing additional loading on the main shaft DIRECT DRIVE Large-Diameter, Close-Coupled Tapered Roller Bearings (TNA Design) Bearings are preloaded to maximize stiffness of the system, load zones and bearing L 10 fatigue life Versatile race construction can accommodate seal riding surfaces, bolt circles, pilots, etc. Unitized, full-roller complement construction and engineered surfaces are optional High predicted L 10 bearing life

9 innovative advanced analysis Through extensive research efforts, testing thousands of bearings, Timken has developed a proprietary method of calculating bearing life, called SYSx. Using this highly advanced software, Timken engineers work closely with wind turbine design engineers to explore the wide range of operating parameters commonly experienced by wind turbines and to identify the optimum friction-management solutions. With long predicted life as the industry's design requirement for bearing L 10 life, applying the best bearing analysis tools during the design phase is critically important. SYSx continues to prove itself to be an ideal bearing program for engineers and customers who rely on it to conduct thorough analysis. SYSx is easily applied when modeling systems and predicting performance in a variety of conditions. Using advanced graphs and diagrams, it portrays complex duty cycles, system deflection and bearing behavior in terms that are informative and easy to understand. Engineers can rely on SYSx results to help optimize gear box designs, predict potential damage modes and reduce development times and costs. At the data input stage, SYSx accommodates all bearing types and 12 types of gear designs. Users can choose from more than 100 plots and animated graphics and performance models, including: Contact stress along roller-race contacts; System deformation; Rib-roller contact dimensions and locations; Solid views of pressure on rollers; Life depletion; Power losses; and Displacement of gear mesh points versus load conditions. SYSx analysis results are based upon numerical simulation that has been generally confirmed with experimentation saving users time and money related to component and system development. Timken s SYSx system graphically displays a variety of analyses, such as system deflection and contact stress.

10 manufacturing excellence Timken designs and produces many types of bearing-related products required for successful wind energy applications, including: standard tapered, spherical and cylindrical roller bearings; tapered roller bearings for locator positions; large-diameter, close-coupled tapered roller bearings; pillow blocks; integrated flex pin bearings; precision-cut bearing retainers; and integrated bearings for planetary gear drives. Every product bears the Timken name, a name synonymous with quality, reliability and precision. Customer satisfaction drives our manufacturing processes. Timken maintains renowned manufacturing facilities that have won awards for excellence in quality and innovative process techniques. The company embraces Lean Manufacturing and Six Sigma principles. Six Sigma applies statistical tools to minimize process variations. Lean Manufacturing uses tools such as set-up reduction to eliminate waste and inefficiency. To leverage both, the company has merged these practices into a unified program, Lean Six Sigma. This results in a strong, total-process improvement program and the ability to compare different parts of the company consistently. This is a natural evolution of our ongoing continuous improvement initiatives. Which bearing style should you choose? Timken manufactures all styles of rolling-element bearings, so we maintain an objective view on which bearing style is optimum for a given application position. Throughout the power train, traditional designs have incorporated cylindrical and spherical roller bearings. Recent experience has also shown a gradual shift toward additional integration of tapered roller bearings because of their unique ability to support radial and thrust loads in virtually any combination. Whether specifying tapered, spherical or cylindrical bearing solutions, you can be confident that the Timken bearing you select meets the highest industry quality standards.

11 customer collaboration and service Every design, every production phase, every service call is driven by one thing: exceeding the expectations of our customers. Timken is committed to remaining a leading supplier of bearings and components to the wind energy industry. We continue to move outside the realm of bearings to bring greater value to our customers. To provide the best service in the industry, we assign customer support teams comprised of sales engineers, product engineers, quality specialists and customer service liaisons to each customer. These cross-functional teams ensure that all aspects of customer satisfaction, from product integrity to modified designs, are managed appropriately. These support teams also provide a small group of contacts for our customers, ensuring rapid, consistent, personal communication. The Timken Company is your resource for comprehensive wind energy solutions. We deliver value at every turn. To learn more about how Timken can improve your operations, visit

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13 The Timken Company is your resource for comprehensive wind energy solutions. We deliver value at every turn. To learn more about how Timken can improve your operations, visit Timken is the registered trademark of The Timken Company The Timken Company Printed in USA 10M Order No. 5600