A bearing number is composed of a basic number and a supplementary code, denoting bearing specifications including bearing type, boundary dimensions, running accuracy, and internal clearance. Bearing numbers of standard bearings corresponding to JIS B 1512 "rolling bearing boundary dimensions" are prescribed in JIS B 1513. As well as these bearing numbers, JTEKT uses supplementary codes other than those provided by JIS. Among basic numbers, bearing series codes are listed in Table 6-1 Bearing series code, and the composition of bearing numbers is described in Table 6-2 Bearing number configuration, showing the order of arrangement of the parts.

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We start with a basic ball or roller bearing component, choosing from our large selection of Reali-Slim® and Ultra-Slim® thin section bearings, or from our wide selection of slewing ring bearings. Using unusual materials, such as titanium or Pyrowear 675, or more standard materials including AISI 52100 and stainless 440C, Kaydon can design a bearing that will simplify the assembly and manufacture of your equipment. We offer a wide variety of:

[Notes] 1) Width series codes in parentheses are omitted in bearing series codes. 2) These are bearing series codes customarily used. 3) Nominal outer ring width series (inner rings only are wide). 4) Besides NU type, NJ, NUP, N, NF, and NH are provided.

Kaydon brings engineering expertise to the design and manufacture of bearing solutions and assemblies for demanding applications. Founded in 1941 as a designer of customer-specific bearings, Kaydon continues to lead the way in custom and pre-engineered bearing solutions for military and commercial applications. With ball bearings, roller bearings, slewing ring bearings, and turntable bearings ranging from 0.75" to 240" diameter, Kaydon can design a product to meet your most challenging bearing demands.