This Standard specifies the boundary dimensions, ba?!c numbers, and tolerances
and permissible values of Class 0 for needle roller bearings of dimension series 48,
49 and 69 as given in JIS B 1512. These series apply to complete needle roller
bearings and to bearings without inner ring.
This Standard does not apply to drawn cup needle roller bearings.
NOTE i This Standard specifies the boundary dimensions and tolerances of needle
roller bearings intending to ensure compatibility and not intending to
perform conformity assessment in accordance with this Standard.
NOTE 2 Boundary dimensions and tolerance for needle roller bearings other than
dimension series 48, 49 and 69 are shown in Annex JA as reference.
NOTE 3 The International Standard corresponding to this Standard is as fol-
lows.
ISO 1206: 2001 Rolling bearings--Needle roller bearings, dimen-
sion series 48, 49 and 69--Boundary dimensions and tolerances (MOD)
In addition, symbols which denote the degree of correspondence in
the contents between the relevant International Standard and JIS are
IDT (identical), MOD (modified), and NEQ (not equivalent) according
to ISO/IEC Guide 21.