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Timken® Cylindrical Roller Bearings

Timken® Cylindrical Roller Bearings
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Timken® Cylindrical Roller Bearings

Product catalog summary
Overview
Timken's Single-Row EMA Series Cylindrical Roller Bearings are engineered for high performance and extended life. These bearings feature an increased capacity design with a machined brass cage, surpassing both Timken's published ratings and leading industry designs.
Specifications
The EMA series is available in sizes from 80 mm ID to 400 mm OD, including designs such as N, NU, NJ, and NUP. They are suitable for applications in wind energy, metals, construction, mining, pumps, hoists, gear drives, and other industrial equipment. The document provides detailed specifications, including dimensions, load ratings, speed ratings, and mass in both metric and imperial units.
Innovative Design
The EMA series features a unique cage design, proprietary internal geometries, and enhanced surface textures. The one-piece brass cage minimizes drag, reduces heat generation, and improves lubrication flow, resulting in longer bearing life. Proprietary profiles on races and rollers increase load capacity, while enhanced surface textures reduce friction and operating temperatures.
Types of Bearings
  • Type NU: Features two integral ribs on the outer ring and a cylindrical inner ring, not designed for thrust load.
  • Type N: Similar to NU but with a cylindrical bore on the outer ring and two ribs on the inner ring, not designed for thrust load.
  • Type NJ: Double-ribbed outer and single-ribbed inner rings, supports heavy radial loads and light unidirectional thrust loads.
  • Type NUP: Double-ribbed outer ring and single-ribbed inner ring with a loose rib, provides axial location and carries light thrust loads in both directions.
Performance and Quality
Timken's EMA series bearings are designed for compactness, allowing for smaller equipment and reduced energy consumption. They are manufactured using super-clean, high-alloy bearing steel, ensuring superior quality and performance. Timken's global distribution network and technical support provide easy access to products and services worldwide.
Procedures and Standards
The document references the ISO life calculation method for determining bearing life, based on a 1 x 106 L10 life. Design variations such as n, nf, np, and nJf are available upon request, with potential minimum volume requirements. Geometry constants for lubrication life adjustment factors are mentioned, with further information available from Timken representatives.
Recommendations
For specific design requests or additional information on lubrication life adjustment factors, contact a Timken representative. The document also suggests consulting Timken for additional sizes and friction management products.
Data Interpretation
The tables provide a comprehensive overview of bearing capabilities, including load capacities and speed limits, which are crucial for selecting the appropriate bearing for specific applications. Chamfer dimensions and backing diameters are critical for ensuring proper mounting and alignment in machinery.
Conclusion
Timken's Single-Row EMA Series Cylindrical Roller Bearings offer innovative design features and superior performance, making them suitable for a wide range of industrial applications. Their high-quality materials and engineering expertise ensure reliability and extended bearing life.
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Catalog excerpts

Timken® Cylindrical Roller Bearings-1

Timken® Cylindrical Roller Bearings

 Open the catalog to page 1
Timken® Cylindrical Roller Bearings-2

High Performance At Timken, our brand stands for outstanding quality in everything we do, from product design and manufacturing to engineering support and distribution. We believe in providing customers with the highest quality product solutions – and the greatest levels of service – for their application needs. Our dedication to high quality solutions is the inspiration for our new line of cylindrical roller bearings. Timken’s single-row EMA series features an increased capacity design with a machined brass cage. This premium design outperforms both the Timken published ratings and the industry’s...

 Open the catalog to page 2
Timken® Cylindrical Roller Bearings-3

Timken's cylindrical roller bearing line is one of the broadest in the industry, backed by everything you need to improve your equipment and business performance. Timken industry experts, a global distribution network and an unwavering commitment to quality all combine to help you improve uptime and achieve the most from your operations. INDUSTRY EXPERTS Timken engineers lead the industry in bearing design and application support. Every high-performance Timken® cylindrical roller bearing comes with our Timken team of experts, providing you with the industry's best design, application and 24/7...

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Timken® Cylindrical Roller Bearings-4

Performance That Raises the Bar We’ve applied more than 80 years of cylindrical roller bearing design and manufacturing experience to achieve the highest levels of performance in the industry. In fact, Timken tests indicate that our new EMA series of cylindrical roller bearings offer greater performance than the Timken-published ratings and the leading highperformance industry design. Innovative Design Unique Internal Geometries From a unique cage design to our proprietary internal geometries Proprietary profiles on the races and rollers increase load and special surface textures, Timken® single-row...

 Open the catalog to page 4
Timken® Cylindrical Roller Bearings-5

Single-row EMA Series Cylindrical Roller Bearings Timken’s single-row EMA series of cylindrical roller bearings is available in a wide variety of size ranges and configurations to meet various application requirements. Size ranges: 80 mm ID - 400 mm OD | Designs: N, NU, NJ, NUP | Common applications: wind energy, metals, construction, mining, pumps, hoists, gear drives and other industrial equipment Type NJ has double-ribbed outer and r r 1s MIN r support heavy radial loads, as well as light unidirectional thrust loads up to are provided. The outer ring has two single-ribbed inner rings and can...

 Open the catalog to page 5
Timken® Cylindrical Roller Bearings-6

(1) Based on 1 X 106 L]0 life for the iSO life calculation method. (2) N, NF, NP, NJF designs are available by request. Minimum volumes may apply. (3) Geometry constant for lubrication life adjustment factor a3l. For more information, contact your Timken representative.

 Open the catalog to page 6
Timken® Cylindrical Roller Bearings-7

(1) Based on 1 X 106 L]0 life for the ISO life calculation method. (2) N, NF, Np, NJF designs are available by request. Minimum volumes may apply. (3) Geometry constant for lubrication life adjustment factor a3l. for more information, contact your Timken representative.

 Open the catalog to page 7
Timken® Cylindrical Roller Bearings-8

(1) Based on 1 X 106 L]0 life for the iSO life calculation method. (2) N, NF, NP, NJF designs are available by request. Minimum volumes may apply. (3) Geometry constant for lubrication life adjustment factor a3l. For more information, contact your Timken representative.

 Open the catalog to page 8
Timken® Cylindrical Roller Bearings-9

(1) Based on 1 X 106 L]0 life for the ISO life calculation method. (2) N, NF, Np, NJF designs are available by request. Minimum volumes may apply. (3) Geometry constant for lubrication life adjustment factor a3l. for more information, contact your Timken representative.

 Open the catalog to page 9
Timken® Cylindrical Roller Bearings-10

(1) Based on 1 X 106 L]0 life for the iSO life calculation method. (2) N, NF, NP, NJF designs are available by request. Minimum volumes may apply. (3) Geometry constant for lubrication life adjustment factor a3l. For more information, contact your Timken representative.

 Open the catalog to page 10
Timken® Cylindrical Roller Bearings-11

(1) Based on 1 X 106 L]0 life for the ISO life calculation method. (2) N, NF, Np, NJF designs are available by request. Minimum volumes may apply. (3) Geometry constant for lubrication life adjustment factor a3l. for more information, contact your Timken representative.

 Open the catalog to page 11
Timken® Cylindrical Roller Bearings-12

(1) Based on 1 X 106 L]0 life for the iSO life calculation method. (2) N, NF, NP, NJF designs are available by request. Minimum volumes may apply. (3) Geometry constant for lubrication life adjustment factor a3l. For more information, contact your Timken representative.

 Open the catalog to page 12
Timken® Cylindrical Roller Bearings-13

(1) Based on 1 X 106 L]0 life for the ISO life calculation method. (2) N, NF, Np, NJF designs are available by request. Minimum volumes may apply. (3) Geometry constant for lubrication life adjustment factor a3l. for more information, contact your Timken representative.

 Open the catalog to page 13
Timken® Cylindrical Roller Bearings-16

For More Information To learn more about Timken® single-row EMA series cylindrical roller bearings or additional sizes, as well as our extensive line of other friction management products and services, The Timken team applies their know-how to improve the reliability and performance of machinery in diverse markets worldwide. The company designs, makes and markets high-performance steel as well as mechanical components, including bearings, gears, chain and related mechanical power transmission products and services. ® 5M 03-12 :29 Order No. 10331 | Timken is a registered trademark of The Timken...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.