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1.5 (Lw/Dw＞6). Unit: μm. Roundness of diameter Dw,. Diameter variation in a single radial plane. Table 3 Discrimination of needle rollers. Label color. Boundary. Bearing numbers. Mass dimensions mm kg per. Dw. Lw flat type disk type. 1 000 pcs. 23.8. F4.5×23.8. A4.5×23.8. 2.86. 25.8. F4.5×25.8. A4.5×25.8. 3.11. 29.8.
With more than ninety years of manufacturing expertise in ball bearings, NTN offers one of the industry's widest arrays of products to fit your application. Our ball bearings are available to you off-the-shelf, in sizes ranging from 10 mm to 320 mm outside diameters. And with a virtually limitless variety of configurations of seals,
Cylindrical roller bearigns. Angular contact ball bearings. Needle roller bearings. Applicable standard. Tolerance class. Metric. Inch. J series. JIS B 1514. （ISO492）. JIS B 1514. ANSI/ABMA Std.19. ANSI/ABMA Std.19.1. NTN standard. Class 0. Class 0. Class 0. Class 0,6X. Class 4. Class K. ―. Class 6 class 6 class 6 class 6.
6. HISTORY. 1918. Began research and manufacture of ball bearings at Nishizono Ironworks (Uchibori, Kuwana-cho,. Kuwanagun, Mie Pref.) 1923. Nishizono Ironworks and Tomoe Trading Co. (Nishi- ku, Osaka) inaugurated joint manufacture and sale of bearings under the brand name NTN. 1927. NTN Mfg. Co., Ltd.
When you need a mounted ball bearing unit - When you need exact specifications is a registered trademark of NTN Corporation of Japan; SealMaster is a registered AMI Bearings, Inc. 3. NOMENCLATURE. Interchange by Manufacturer. 6. INTERCHANGE INFORMATION. Prefix and Suffix Nomenclature. 11. Description.
Dec 18, 2009 2009. Equal Opportunity Employer. CYLINDRICAL. AND. TAPERED. ROLLER. BEARINGS. CATALOG A-1500-III. Printed in USA 3/2009 6 74 84. 6 74 84. 2. 2 1 2. (19). (20). Combine examples 1 and 2. R. V. H. B. A. A. = +(. ) + +(. ) [. ] 2. 2 12 a b c d l. A. B. F1. F2. F3. F4 g f. (Fa)1. (Fa)2. (21). (22). 2.