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Inner Rings are heat-treated and finished by grinding to a high degree of accuracy. In the case of needle roller bearings, normally, the shafts are heat- treated and finished by grinding, and used as the raceway surfaces. However, when it is impossible to make shaft surfaces according to the specified sur- face hardness or
lips for the DS type, with bearing grease. □Precautions for Use When fitting seals to needle roller bearings with inner ring, wide inner rings.. TA 3820Z. TA 3825Z. TA 3830Z. TAW 3845Z. ─. ─. TAF 354520. TAF 354530. RNA 4906. RNA 6906. TAF 374720. TAF 374730. TAF 384820. TAF 384830. ─. ─. RNAF 354517.