CYLINDRICAL ROLLER BEARINGS E SERIES

As one of the world’s leading manufacturers of rolling bearings, linear technology components and steering systems, we can be found on almost every continent – with production facilities, sales offices and technology centres – because our customers appreciate short decision-making channels, prompt deliveries and local service. Asia The Americas Oceania Africa The NSK company NSK commenced operations as the first Japanese manufacturer of rolling bearings back in 1916. Ever since, we have been continuously expanding and improving not only our product portfolio but also our range of services for...

Partnership based on trust – and trust based on quality Total Quality by NSK: The synergies of our global network of NSK Technology Centres. Just one example of how we meet our requirements for high quality. NSK is one of the leading companies with a long tradition in patent applications for machine parts. In our worldwide research centres, we not only concentrate on the development of new technologies, but also on the continual improvement of quality based on the integrated technology platform of tribology, material technology, analysis and mechatronics. More about NSK at www.nskeurope.com or...

Cylindrical Roller Bearings

NSK cylindrical roller bearings can be used in all applications requiring a high radial load as well as easy assembly. Both bearing rings can, if necessary, be fitted tightly. Cylindrical roller bearings have a high radial load capacity and are suitable for high speeds. The modified design of the rolling contacts helps to avoid harmful edge stresses. Cylindrical roller bearings are produced in a number of designs depending on the various demands on the bearings during use. The NU-type bearings have two fixed ribs on the outer ring and an inner ring without a rib. Construction type N has two fixed...

EM + EW Series – Design Concept of our latest developed Standard Bearing EM Series You can now take advantage of NSK’s latest developed cylindrical roller bearing, the EM Series, which combines the strengths and technologies of previous cage designs into a one-piece brass roller-guided cage. NSK has achieved a design involving even newer concepts, while maintaining excellence in function and service life. Our EM Series can meet your high load-carrying capacity needs for the new era. The latest developed Standard Bearing Greater accuracy of the roller guidance achieved through special pocket profiling...

EW Series NSK has developed a higher load-carrying capacity pressed cage with low noise and superior cage strength. Our EW series is a standard cylindrical roller bearing that facilitates interchangeability across the globe, while offering better performance for every application. The latest developed Standard Bearing Roller guide face › Higher limiting speed › Maximum rigidity › Low noise CYLINDRICAL ROLLER BEARINGS E SERIE

Internal Design Guide Maximum rigidity and low noise One-piece cage providing greater accuracy Roller-guided cage achieves lower temperature running and quieter operation Outer ring Rollers Cage High strength and wear resistant cage Well-balanced one-piece design Inner ring Rivets High load rating Greater number of larger rollers M Series

Outer ring High load rating Greater number of larger rollers Rollers Cage Higher limiting speed Inner ring Maximum rigidity and low noise Optimum and well-balanced design CYLINDRICAL ROLLER BEARINGS E SERIES 9

EM Series – Results of FEM Analysis Tests confirm that the stress levels of EM series cages are 50% lower than M Series. M Series Cage strength test results EM-1 Number of oscillations until breakage Number of oscillations until rivets loosen No breakage and test discontinued Test conditions Test bearing: Oscillation angle: Radial load: Lubrication method: The tests confirm the EM series cages performance and strength.

M stegvernieteter Messingmassivkäfig des Wettbewerbs 1 200 Noise measurement test results 80 M Drehzahl (min–1) Microphone position and measuring load stegvernieteter Messingmassivkäfig des Wettbewerbs 10 Measuring conditions Bearing number: NU308 Method: JIS B1 548 Radial load: 392 N Speed: 1 200 to 1 800 min–1 The EM series exhibited noise levels 5 dB lower than two-piece cage designs. Higher Load Rating Comparison of dynamic load rating Cr 600 000 Basic dynamic load rating, N Basic dynamic load rating, N Mircophone diaphragm The EM series benefits from a 30% higher load-carrying capacity than...

EW Series – Results of FEM Analysis Tests confirm that the stress levels of NSK’s EW series cages are 40% lower than that of cages in conventional W Series. W Series Cage strength test results EW-1 W Series 2 W Series 3 W Series 4 until breakages No breakage and Test discontinued Test conditions Test bearing: Oscillating angle: Radial load: Lubrication method: The tests confirm the EW series cage performance and strength.

Noise measurements test results 80 Microphone position and measuring load Measuring conditions Bearing number: NU308 Method: JIS B1548 Radial load: 392 N Speed: 1 200–1 800 min–1 The EW Series is 3 to 7 dB quieter than W series. Higher Limiting Speed Higher Load Rating Comparison of limiting speed Comparison of dynamic load rating Cr Grease Lubrication 213 305 213 305 Bearing number Oil Lubrication Bearing number The limiting speed of the EW Series is 10 - 25% higher than that of conventional W Series. Basic dynamic load rating, N The load rating of the EW Series is 10 - 60% higher than that...

EM Series – Bearing Tables NUP Basic Load Ratings (N) Limiting Speeds (min–1) Grease

Abutment and Filet Dimensions (mm) NUP Permissible Axial Movement (mm) CYLINDRICAL ROLLER BEARINGS E SERIES 15

EM Series – Bearing Tables Basic Load Ratings (N)

Bearing Number Abutment and Filet Dimensions (mm) Permissible Axial Movement (mm) CYLINDRICAL ROLLER BEARINGS E SERIES 17