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Ref. No. , ISO/R 1120-1969 (E)
UDC 621.867.2 : 620.1
IS0
ORGAN I Z AT I O N FOR S TA N DARD IZATl ON
I N T ERN AT I O N A L
IS0 RECOMMENDATION
R 1120
STRENGTH OF MECHANICAL FASTENINGS
FOR CONVEYOR BELTS
(STATIC TEST METHOD)
1st EDITION
September 1969
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.
Printed in Switzerland
Also issued in French and Russian. be obtained through the national standards organizations.
Copies to
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BRIEF HISTORY
The IS0 Recommendation R 1 120, Strength of'mechanical fastenings for conveyor belts (Static test method),
was drawn up by Technical Committee ISO/TC 41, Pulleys and belts (including vee-belts), the Secretariat of which
is held by the Association Française de Normalisation (AFNOR).
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Work on this question led to the adoption of a Draft IS0 Recommendation.
In August 1968, this Draft IS0 Recommendation (No. 1668) was circulated to all the IS0 Member Bodies
for enquiry. It was approved, subject to a few modifications of an editorial nature, by the following Member Bodies
Australia Greece Spain
Sweden
Austria India
Switzerland
Belgium Israel
Thailand
Brazil Italy
Czechoslovakia Korea, Rep. of Turkey
Denmark Netherlands 1Jnited Kingdom
Finland New Zealand lJ.S.A.
France Norway lJ.S S.R.
Germany South Africa, Rep. of
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 September 1969, to accept it as an IS0 RECOMMENDATION.
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ISO/R 1120-1969 (E)
IS0 Recommendation R 1120 September 1969
STRENGTH OF MECHANICAL FASTENINGS
I
FOR CONVEYOR BELTS
(STATIC TEST METHOD)
1. SCOPE
This IS0 Recommendation describes a static test method for measuring the strength of a conveyor belt
mechanical fastening; the joints can be of either the permanent type or capable of disconnection.
This IS0 Recommendation does not cover vulcanized joints.
NOTE. - The purpose of the test described in this IS0 Recommendation is to eliminate mechanical fastenings having an
insufficient static strength. A dynamic test is to be established at a later date.
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2. DEFINITIONS
2.1 Width offastening. The number of units multiplied by the pitch, or the number of hooks multiplied by
the pitch.
2.2 Pitch. The distance between a point on a unit or hook and the corresponding point on the next unit or
next hook, according to the type of fastening (see Fig. 1).
3. PRINCIPLE
Application of an increasing tensile force on a test piece until the joint made by the mechanical fastening breaks
and comes apart.
4. APPARATUS
4.1 Metallic adaptor plate for joints that can be disconnected.
4.2 Dynamometer similar to that described in IS0 Recommendation R 283, Full thickness tensile strength
and elongation of conveyor belts - Specifications and method of test.
5. TEST PIECES
5.1 Shape, dimensions and preparation
5.1.1 Joints that can be disconnected. The test piece should consist of a full thickness piece of belting cut
in the longitudinal direction, with a minimum length of 100 mm plus the gripped length, and should
be 150 mm wide. It should be connected to the connecting plate by the mechanical fastening to be
used; the fastened width should be at least 100 mm.
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When the o
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