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New Product ULTAGE
Development of “ULTAGE Tapered Roller Bearing for Automotive Application”
May 18, 2017New Products

World highest level in high-load capacity and high speed rotational performance!

NTN Corporation (hereafter, NTN) has developed the “ULTAGE *1 Tapered Roller Bearing for Automotive Application” that delivers the world's highest standard of high-load capacity and high-speed rotational performance with optimal internal design of bearing.

Tapered roller bearings for automobiles are used in transmission components such as transmissions and differentials, and need to have a high-load capacity to operate conditions that are becoming increasingly harsh in recent years, including the greater loads due to higher power output of automobiles, as well as greater unbalanced loads caused by the lower rigidity due to lightweight housings. The tapered roller bearings also need to provide low torque required for lower fuel consumption and high-efficiency and high-speed rotational performance in low temperature.

The developed “ULTAGE Tapered Roller Bearing for Automotive Application” is a new, compact series lineup that has been modified with optimal design technology for the shape of tapered rollers that maximize the rolling operating life as used for the Large Size Tapered Roller Bearing*2. This design maximizes the potential operating life with an equation of contact surface pressure between the rolling element (rollers) and raceway (inner and outer ring), even when there are high loads or unbalanced loads.

This optimal design gives the bearing a high-load capacity that is 1.3-times higher than the conventional product*3, and improves the rated life by 2.5-times or more. Sliding contact zone between the rollers, inner ring and retainer are also optimized, which raises the permitted rotational speed by approximately 10% to offer the world's highest level in high-load capacity and high-speed rotational performance.

A high-performance type was also developed to suit harsh lubrication conditions such as contamination, by combining NTN's proprietary special heat treatment process to achieve excellent protection against seizing and a bearing rated life that is 3.8-times more than conventional products.

NTN will replace the compact tapered roller bearing series under 150 mm in outer diameter, which has a high demand for automotive applications with the developed products, and expand sales activities globally. NTN will exhibit the developed product at the “Automotive Engineering Exposition 2017” to be held at Pacifico Yokohama from May 24 to 26.

  1. ULTAGE is the name for NTN's new generation of the world's highest standard of bearing series, and expresses the “ULTIMATE” performance on any type of “STAGE”.
  2. Development of “ULTAGE Large Size Tapered Roller Bearing”
    https://www.ntnglobal.com/en/news/new_products/news201400030.html
  3. NTN catalog: CAT.No.2202-VII/J “Ball and Roller Bearings Catalog”

Features

Compared to conventional product*3 (tapered roller bearings)

(1) World's highest standard high-load capacity 1.3-times basic dynamic load rating
(2) Long operating life 2.5-times or more bearing rated life
High-performance type (proprietary NTN's special heat treatment) 3.8-times or more
(3) World's highest level in high-speed rotational performance approximately 10% increase in permitted rotational speed

Applications

  • Automotive transmissions, differentials, axle support tapered roller bearing

Inquiries about this release

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Product photo

ULTAGE Tapered Roller Bearing for Automotive ApplicationULTAGE Tapered Roller Bearing for Automotive Application

Structure

ULTAGE Tapered Roller Bearing for Automotive Application ULTAGE Tapered Roller Bearing for Automotive Application

Example of applications

CVTCVT Rear differentialRear differential

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