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Ref. No.: ISO/R 355/Part II - 1965 (E)
IS0
INTERN AT1 ON AL ORGAN I ZATl O N FOR STAN DA RD I ZATl ON
IS0 RECOMMENDATION
.
R 355
PART II
ROLLING BEARINGS
TAPERED ROLLER BEARINGS
BOUNDARY DIMENSIONS
1st EDITION
December 1965
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
in Switzerland
Printed
Also issued in French and Russian. Copies to be obtained through the national standards organizations
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BRIEF HISTORY
The IS0 Recommendation R 355, Rolling Bearings. Tapered Roller Bearings, Boundary
Dimensions, Part ZZ, was drawn up by Technical Committee ISO/TC 4, Rolling Bearings, the
Secretariat of which is held by the Sveriges Standardiseringskomission (SIS).
Work on this question by the Technical Committee began in 1958 and led, in 1961, to the
adoption of a Draft IS0 Recommendstion.
In January 1963, this Draft IS0 Recommendation (No. 472) was circulated to all the IS0
Member Bodies for enquiry. It was approved by the following Member Bodies:
Australia
Greece Spain
Austria
Hungary Sweden
Belgium India Switzerland
Canada Italy Turkey
Chile Japan United Kingdom
Czechoslovakia Netherlands U.S.S.R.
France
Poland Yugoslavia
Germany Romania
No Member Body opposed the approval of the Draft.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council,
which decided, in December 1965, to accept it as an IS0 RECOMMENDATION.
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ISO/R 355/Part II - 1965 (E)
IS0 Recommendation R 355 Decem ber 1965
ROLLING BEARINGS
TAPERED ROLLER BEARINGS
BOUNDARY DIMENSIONS
PART II
1. METRIC SERIES: EXTENSION OF DIAMETER SERIES 2 AND 3
f
d = bearing bore diameter
D = bearing outside diameter
B = inner ringwidth
T = bearing width* (width over bearing rings)
r = chamfer dimension** (height and width) on inner and outer ring back faces
rI = chamfer dimension** (height and width) on inner and outer ring front faces
* Attention is called to the fact that the cage may project beyond the bearing width.
** Nominal chamfer dimensions do not control the shape of the bearing corner.
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ISO/R 3551Pari II - 1965 (E)
1.1 Diameter Series 2
1.1.1 Dimensions in millimetres
Dimension series
Chamfers
02
Bore Outside
diameter diameter
Inner ' Bearing
width ring ~ width
nominal nominal
d D
BIT I ri
BIT
-I -
120 215 40 43.5 3.5 , 1.2
130 230 40 ~ 43.75 4 1.5
-I -
140 250 42 ' 45.75 4 1.5
150 270 45 ~ 49 4
1.5
160 290 48 52 4 1.5
170 310 52 57 5 2
180 320 52 57
86 91 5 2
190 340 55 60 5
92 ' 97 2
200 360 58 64 98 104 5 2
65
220 400 72 108 114 5 2
...