GB/T 91-2000 PDF English
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| GB/T 91-2000 | English | 70 |
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GB/T 91-2000: Split pins---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT91-2000
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.060.50
J 13
eqv ISO 1234.1997, replacing GB/T 91-1986
Split pins
Issued on. SEPTEMBER 26, 2000
Implemented on. FEBRUARY 01, 2001
Issued by. State Bureau of Quality and Technical Supervision
Table of Contents
Foreword... 3
ISO Foreword... 5
1 Scope... 6
2 Normative references... 6
3 Dimensions... 6
4 Technical conditions and quoted standards... 8
5 Marking... 9
Foreword
This Standard equivalently uses the international standard ISO 1234.1997 "Split pins".
This Standard is part of the national standard "pins" product series. The series include.
a) Split pins. GB/T 91;
b) Tapered pins. GB/T 117, GB/T 118, GB/T 877 and GB/T 881;
c) Cylindrical pins. GB/T 119.1, GB/T 119.2, GB/T 120.1, GB/T 120.2, GB/T 878
and GB/T 880;
d) Pin shaft. GB/T 882;
e) Elastic pins. GB/T 879.1, GB/T 879.2, GB/T 879.3, GB/T 879.4 and GB/T 879.5;
f) Slotted pins. GB/T 13829.1, GB/T 13829.2 and GB/T 13829.3.
ISO 1234 does not specify split pins with nominal sizes of 3, 6 and 12mm. This
Standard stipulates that by mutual agreement, [the corner note 1) in Table 1] is allowed
to be used.
ISO 1234 does not specify material designations for split pins, which are specified in
this Standard (Table 3).
ISO 1234 does not specify the offset of the gap between the legs of the split pin and the
type that allows it to be made into a split, which are specified in this Standard (Work
quality ○3 and ○4 in Table 3).
ISO 1234 does not specify the bending method, which is specified in this Standard
(Table 3).
ISO 1234 does not specify technical requirements for packaging, which is specified in
this Standard (Table 3).
ISO 1234 does not specify simplified markings. This Standard gives simplified marking
examples according to the simplified principles of GB/T 1237 (Subclause 5.2).
This Standard is a revision of GB/T 91-1986.The main modifications in this Standard
are as follows.
a) Shape of split pin end. Change the tip to the basic type. The flat end is changed to
the type that allows to be manufactured (Figure 1);
b) Added nominal sizes to 13, 16 and 20mm. Change the nominal size of 12mm to
the size allowed by the agreement between the supplier and the buyer (Table 1);
c) Add the nominal size of the split pin for bolts and U-shape pins (Table 1);
d) Add the recommended pin hole diameter tolerance. Use the recommended size
for rails and U-shape pins [Corner notes 1), 2) in Table 1];
e) Adjust the requirements and methods for bending test of split pins (Toughness in
Table 3);
f) Add the requirement items for work quality of split pins (Work quality ○1 and ○2
in Table 3).
This Standard replaces GB/T 91-1986 from the date of implementation.
This Standard was proposed by State Machinery Industry Bureau.
This Standard shall be under the jurisdiction of National Technical Committee on
Fasteners of Standardization Administration of China.
Main drafting organizations of this Standard. Institute of Mechanical Sciences. The
drafting organizations of this Standard. Tianjin Split Pin Factory and Shanghai Spring
Washer Factory.
This Standard shall be interpreted by Secretariat of National Technical Committee on
Fasteners of Standardization Administration of China.
ISO Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national standards bodies (ISO member bodies). The work of preparing International
Standards is normally carried out through ISO technical committees. Each member
body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates
closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
Draft International Standards adopted by the technical committees are circulated to the
member bodies for voting. Publication as an International Standard requires approval
by at least 75% of the member bodies casting a vote.
International Standard ISO 1234 was prepared by Technical Committee ISO/TC 2,
Fasteners.
This second edition cancels and replaces the first edition (ISO 1234.1976), which has
been technically revised.
Split pins
1 Scope
This document specifies the split pins with a nominal size of 0.6~20mm.
2 Normative references
The following standards contain provisions which, through reference in this Standard,
constitute provisions of this Standard. At the time of publication, the editions indicated
are valid. All standards are subject to revision. The parties who are using this Standard
shall explore the possibility of using the latest version of the following standards.
GB/T 90-1985, Acceptance inspection, marking and packaging of fasteners (eqv
ISO 3269.1984)
GB/T 700-1988, Carbon structural steels
GB/T 1220-1984, Stainless steel rod
GB/T 1237-2000, Designation system for fasteners (eqv ISO 8991.1986)
3 Dimensions
Split pins with nominal sizes of 3, 6 and 12mm are permitted by agreement between the supplier and the buyer.
4 Technical conditions and quoted standards
The cross-section of the legs of the split pin shall be round. However, it is
allowed to have rounded corners with radius r = (0.05~0.1) dmax at the
intersection of the plane of the two feet of the split pin and the circumference.
The gap between the two feet of the split pin and the displacement of the two
feet shall not be greater than the difference between the nominal size of the
split pin and dmax.
5 Marking
5.1 The marking method is specified in GB/T 1237.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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