Spherical Roller Thrust Bearings - 8 Pages

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Catalogue excerpts

Roller Thrust Bearings

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High Capacity and Quiet Operation Spherical Roller Thrust Bearings

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Quiet Operation High Capacity Improving internal parts quality, NACHI achieves lower noise level and 50% reductions in vibration. Using large rollers results in higher Dynamic Load Rating. Low Heat Generation 200ºC Operating Temperature The newly developed standard heat stablization treatment process allows NACHI EX-Type Spherical Roller Thrust Bearings to be used under high operating temperature with minimal dimensional changes. NACHI developed the R-shaped pressed steel cage, which maximizes lubrication flow. The new cage helps reduce heat generation and extends the permissible speed

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High Capacity and Quiet Operation Spherical Roller Thrust Bearings Greater load carrying capacity •To obtain maximum capacity of basic dynamic carrying load in the dimensionally restricted section, the diameter, quantity and effective length of roller has been maximized. The stress is distributed equally along the contact areas of outer ring/roller and inner ring /roller due to a optimized internal design. •Due to the above improvements, bearing life has been increased by 1.5-2.0 times that of NACHI conventional E-Type. Achievement of Quiet Operation •improving internal parts quality, NACHI achieves...

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Low heat generation even during the high speed operation •in order to maximize a lubrication flow, NACHI developed R shape pressed steel cage. •Most of the heat generated is caused by the sliding motion between inner ring flange and roller end at high speed operation. NACHI analyzes this critical area by using Hertz & Lubrication theory and have optimized the design to reduce heat build up. •Due to the above improvements, the heat generation of EX-Type bearings can be reduced by over 10% and the permissible speed can be extended by over 10% compared with the conventional design. High Speed Rotating...

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High Capacity and Quiet Operation Spherical Roller Thrust Bearings iDynamic equivalent axial load ►Static equivalent axial load where, Fa : Axial load ► In case of applied radial load, not exceed 50% of axial load. 5 Note: For heavy load application, da should be large enough to support the shaft washer rib.

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Because there are many sliding surfaces in Spherical Roller Thrust Bearings (cage-to-guide-sleeve and roller-ends-to-rib), oil lubricant (not grease) should be used. •Aligning angle Maximum permissible misalignment angle is about 2° under general service conditions. If the aligning advantages of this bearing type are to be realized, care must be taken to provide clearance for parts in the surrounding structure. •The safty-facter "So" must be over 4. •Minimum axial load To prevent damage caused by sliding motion between the rollers and raceway, spherical p _ Coa roller thrust bearings must be subjected...

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NACHI AMERICA INC. HEAD QUARTERS NACHI-FUJIKOSHI CORP. INDIA REPRESENTATIVE OFFICE 715 Pushville Road, Greenwood, Indiana, 46143, U.S.A. Tel: +1-317-530-1001 Fax: +1-317-530-1011 URL: http://www.nachiamerica.com/ Global Foyer, Unit No.3, 1st Floor, DLF Golf Course Road, Sector-43, Gurgaon, Haryana 122002, INDIA Tel: +91-124-493-2600 Fax: +91-124-493-2608 WEST COAST BRANCH 12652 E. AIondra Blvd. Cerritos, California, 90703, U.S.A. Tel: +1-562-802-0055 Fax: +1-562-802-2455 Unit 1, 23-29 South Street, Rydalmere, N.S.W, 2116, AUSTRALIA Tel: +61-(0)2-9898-1511 Fax: +61-(0)2-9898-1678 URL: http://www.nachi.com.au/ MIAMI...

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