This standard is equivalent to ISO 246:1995 "Rolling bearings, cylindrical roller bearings, oblique retaining rings, dimensions", and is a revision of JB/T 7917-95 "Rolling bearings, cylindrical roller bearings, oblique retaining rings, dimensions". The revisions are as follows: JB/T 7917-1999 Rolling bearings, cylindrical roller bearings, oblique retaining rings, dimensions JB/T7917-1999 Standard download decompression password: www.bzxz.net

ICS 21.100.20
Machinery Industry Standard of the People's Republic of China
JB/T7917-1999
idtISO246:1995
Rolling bearings
Cylindrical roller bearings-separatethrust collars
Overall dimensions
Rolling bearings-Cylindrical roller bearingsseparatethrustcollars-Boundary dimensionsPublished on 1999-06-28
State Machinery Industry Bureau
Implementation on 2000-01-01
JB/T7917-1999
This standard is equivalent to ISO246:1995 "Rolling bearings-Cylindrical roller bearings-Separatethrustcollars-Boundary dimensions" and is a revision of JB/T7917-95 "Valve column roller bearings-Side dimensions of the bevel collar". This standard has the following technical contents changed: - According to GB/T272-93 "Rolling Bearing Code Method", the text description of the diameter series has been changed; - The r value has been added;
- The outer diameter symbol has been changed to d,:
- The size segment has been increased or decreased.
This standard replaces JB/T7917-95 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Rolling Bearings. The responsible drafting unit of this standard: Luoyang Bearing Research Institute. The main drafter of this standard: Song Yucong.
This standard was first issued as GB4665-84 in August 1984 and adjusted to JB/T7919-95 in April 1996. JB/T7917-1999
ISO ForewordbZxz.net
ISO246 was formulated by ISO/TC4 Technical Committee for Rolling Bearings. ISO246:1995 (Second Edition) replaces ISO246:1978 (First Edition) and is a technical revision of the first edition. Scope
Mechanical Industry Standard of the People's Republic of China
Rolling bearings
Cylindrical roller bearings-Bevel collars-Boundary dimensions
Rolling bearings-Cylindrical roller bearingsseparate thrust collars-Boundary dimensionsJB/T 79171999
idt ISO 246 : 1995
Replaces JB/T7917-1995
This standard specifies the width, maximum outer diameter, inner diameter and minimum chamfer of inner hole for bevel collars for cylindrical roller bearings of diameter series 2, 3 and 4 in GB/T283.
Cited Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the version 4 shown is valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T274-1991 Rolling bearing assembly chamfer limit GB/T283-1994 Rolling bearing cylindrical roller bearing dimension 3 Symbols and abbreviations
Symbols and abbreviations are shown in Figure 1.
Unless otherwise specified, the symbols shown in Figure 1 and the table represent nominal dimensions. d: Inner diameter of the bevel retaining ring
d: Outer diameter of the bevel retaining ring
B,: Width of the bevel retaining ring
: Single chamfer size of the inner hole
\: Minimum single chamfer size allowed
Approved by the State Machinery Industry Bureau on 1999-06-28 and implemented on 2000-01-01
4 Overall dimensions
JB/T7917-1999
The overall dimensions of the bevel retaining ring shall comply with the provisions of Table 1. Table 1 Overall dimensions
Diameter series
1) The corresponding maximum chamfer size is specified in GB/T274; B,
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