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T ECHNICAL INFORMATION 49558
Subject Change on ball bearing
For Models 9520B, 9520, 9520NB, 9521NB and 9522NB
Description The ball bearing shown in the figure below will be changed from 607LLB (seal color: black)
to 607DDW (seal color: green).
Ball bearing
Interchangeability(I/C)
Item No. Current part Q'ty I/C New part Q'ty Note
Ball bearing 607LLB 1 Ball bearing 607DDW
4 <= 1
211021-9 210017-7
Note
Interchangeability mark : <= mark indicates that the new type part can be substituted for the current type part.
Implementation
9520B: From serial No. 15118E
9520: From the next order
9520NB: From serial No. 7706E
9521NB: From serial No. 29641E
9522NB: From serial No. 27510E