Spherical Roller Bearings
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ROLLER BEARINGS www.ntn-snr.com An unrivalled extensive product range!

THE STRENGTH OF A GROUP NTN Corporation, a global leader in bearings, specializes in designing, developing and producing spherical roller bearings. With NTN-SNR BEARINGS, benefit from this know-how near you with: • An extensive range of spherical roller bearings • The constant pursuit for excellence, culminating in high levels of performance and exceptional quality • Extended service life and unfailing reliability, as recognised by thousands of users around the world Globally, NTN Corporation is an expert in product life cycle management, and is typified by the accessibility and commitment...

Principle of spherical roller bearings ULTAGE quality Controlled manufacturing Sectors of activity and applications Internal radial clearance and tolerances Dedicated products • EF800 series for high-vibration applications • Sealed products with elastomer seals • All-in-one bearing kits • KIZEI : the first spherical roller bearing with metal shields • Products with solid lubrication TECHNICAL INFORMATION Nominal service life Adjusted nominal service life Method for determining aISO (ISO 281) Determining the minimum viscosity PRACTICAL INFORMATION Fitting & removal tools Spherical roller...

CHARACTERISTICS OF THE RANGE Principle of spherical roller bearings ULTAGE quality Controlled manufacturing Sectors of activity and applications Internal radial clearance and tolerances Dedicated products • EF800 series for high-vibration applications • Sealed products with elastomer seals • All-in-one bearing kits • KIZEI®: the first spherical roller bearing with metal shields • Products with solid lubrication

CHARACTERISTICS OF THE RANGE PRINCIPLE OF SPHERICAL ROLLER BEARINGS Spherical roller bearings are engineered to offer excellent resistance to high temperatures and loads, meaning that they are capable of withstanding the harshest applications. They are a popular choice for absorbing misalignments, impacts and vibrations, as well as operating in polluted environments. Misalignment The design of the spherical roller bearings allows for misalignment between the outer ring and the inner ring with no loss of bearing performance. Under normal operating conditions, i.e. where the C/P ratio...

ULTAGE FEATURES • Superior grade steel • Improved roller size • Enhanced surface finishes • Cage made from high-performance solid brass or drawn steel without a central guide ring • Specific heat treatment processes BENEFITS • Service life doubled with increased load capacities • Greater rigidity and stability • Reduced in-service temperatures with improved lubricant circulation within the bearing • Dimensional stability up to 200°C without impairing the bearing's mechanical properties • peed limits 20% higher than conventional designs due to the S excellent surface properties "ULTAGE: less...

CONTROLLED MANUFACTURING AN ALL-INTERNAL IRONCLAD PROCESS Our entire range of spherical roller bearings is developed and manufactured internally in our Japanese and Italian factories. The NTN Group is strongly committed to keeping its production processes in-house as a sign of its superlative quality and expertise, especially since its bearings are widely used in critical and costly applications. This strategy ensures that the Group exercises complete control over its range of spherical roller bearings, from product design through to marketing. The NTN Group has spearheaded a...

SPHERICAL ROLLER BEARING An unrivalled extensive product range! 9

SECTORS OF ACTIVITY AND APPLICATIONS NTN-SNR possesses one of the widest ranges of spherical roller bearings offering high-end load capacity and speed performance. Expertise in product design and complete control over the production process guarantee the best results for the most demanding applications.

Fig. 3: Series of spherical roller bearings available from NTN-SNR NTN-SNR proposes a full range of spherical roller bearings with cylindrical and tapered bores from 25 to 1400 mm. These bearings are available in several series designed to cater to the broadest spectrum of usages depending on your requirements in terms of loads, speeds and dimensions. Most spherical roller bearings are proposed with the Ultage design (type E). Some products are available with a conventional design (type V) or asymmetric design specific to oversize versions (type B). CODE SYSTEM CAGE A D : rawn steel cage...

TYPES OF DESIGN ULTAGE DESIGN: TYPE E • Symmetrical rollers • No central rib for optimal load capacity and optimum lubricant flow in the bearing • Stabilisation of the steel for use at temperatures of up to +200°C • ptimised internal geometry to minimise friction and heat build-up O • age made from drawn steel (EA), fibre glass reinforced polyamide (EG15) or machined solid brass C (EM) for the harshest applications • Lubrication groove and holes on the outer ring (W33 or D1) Do not use a product with a fibre glass reinforced polyamide cage over 150°C Fig. 4: Cross-sectional diagram of the...

TYPE B DESIGN • Design used for oversize bearings • Asymmetrical rollers • Shoulder section fixed to the centre of the inner ring • Stabilisation of the steel for use at temperatures of up to +200°C • Machined steel or brass cage • Lubrication groove and holes on the outer ring (not indicated by a suffix) Fig. 7: Cross-sectional diagram of a type B bearing TYPE V DESIGN • Earlier generation to the Ultage design, type E • Symmetrical rollers • No central rib for optimal load capacity and optimum lubricant flow in the bearing • tabilisation of the steel for use at temperatures of up to +200°C...

CAGES ULTAGE EA DESIGN - DRAWN STEEL CAGE "Minimal friction and heat build-up, increased service life and reduced maintenance costs" Four tangs per cage pocket to guide and retain the rolling elements Fig. 8: Ultage design bearing with EA cage Fig. 9: Unique guidance system for perfect control • Two steel plate window cages centred on the ground surface of the inner ring • Precise guidance of the rollers with a unique four-tang system for perfect control of the position of the rolling elements The steel plate cages are reinforced with a specific surface treatment process, which may either...