ISO 3684:1976

Conveyor belts — Determination of minimum pulley diameters for belt-conveyors

Courroies transporteuses — Détermination des diamètres minimaux des tambours

General Information

• Status: Withdrawn
• Publication Date: 30-Sep-1976
• Withdrawal Date: 30-Sep-1976
• ICS: 53.040.20 - Components for conveyors
• Technical Committee: ISO/TC 41 - Pulleys and belts (including veebelts)
• Drafting Committee: ISO/TC 41 - Pulleys and belts (including veebelts)
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 01-Mar-1990

Relations

• Revised: ISO 3684:1990 - Conveyor belts — Determination of minimum pulley diameters
• Effective Date: 15-Apr-2008
• Revised: SIST ISO 3684:1997 - Conveyor belts -- Determination of minimum pulley diameters
• Effective Date: 12-May-2008

Standards Content (Sample)

INTERNATIONAL STANDARD 3684
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION .MEWIYHAPOnHAR OPTAHU3AUUR II0 CTAHLIAPTU3AUAA .ORGANISATION INTERNATIONALE DE NORMALISATION
Conveyor belts - Determination of minimum pulley
diameters for belt-conveyors
Courroies transporteuses - Détermination des diamètres minimaux des tambours
First edition - 1976-10-15
e
-
W
-
UDC 621.852 Ref. No. IS0 3684-1976 (E)
(D
PI
z
Descriptors : conveyor belts, pulleys, specifications, diameters.
8
(D
(?
O
Price based on 4 pages
!"

---------------------- Page: 1 ----------------------
FOREWORD
IS0 (the International Organization for Standardization) is a worldwide federation
of national standards institutes (IS0 Member Bodies). The work of developing
International Standards is carried out through IS0 Technical Committees. Every
Member Body interested in a subject for which a Technical Committee has been set
up 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.
Draft International Standards adopted by the Technical Committees are circulated
to the Member Bodies for approval before their acceptance as International
Standards by the IS0 Council.
International Standard IS0 3684 was drawn up by Technical Committee
ISO/TC 41, Pulleys and belts (including veebelts) and was circulated to the Member
1974.
Bodies in September
It has been approved by the Member Bodies of the following countries :
Belgium Germany Spain
Bulgaria India Sweden
Canada Ireland Turkey
Czechoslovakia Italy U.S.A.
Finland Poland Yugoslavia
France Romania
The Member Body of the following country expressed disapproval of the document
on technical grounds :
United Kingdom
O International Organization for Standardization, 1976
Printed in Switzerland

---------------------- Page: 2 ----------------------
INTERNATIONAL STANDARD IS0 3684-1976( E)
Conveyor belts - Determination of minimum pulley
diameters for belt-conveyors
1 SCOPE AND FIELD OF APPLICATION - loop pulleys in the tripper;
- terminal head pulleys in the case of tail driving, etc.
This International Standard establishes a method of calcu-
of minimum pulley diameters for belt-conveyors.
lation
B : Snub pulleys in the return run under lower belt tension,
It applies to belts made of rubber or plastics with textile
for example :
carcasses, of different carcass thicknesses and different
0
carcass materials, operating at any anticipated belt tension
- terminal tail pulleys in the case of head driving;
up to, but not exceeding, the recommended maximum belt
- terminal head pulleys for down-hill conveying if the
tension (RMBT).
terminal tail pulley is braked;
It does not apply either to belts which have a carcass
thickness of more than 20 mm or to those which have
- snub and bend pulleys in take-up devices.
intermediate layers of rubber or plastics of more than
C : Bend pulleys, for a change of direction of the belt of
0,8 mm thickness between the plies.
less than 30".
The use on belt-conveyors of pulleys with diameters too
small for the construction of the carcass may lead to
2.3 Pulley diameter
premature belt failure, occurring either as ply-separation
or as fracture of the fabric.
pulley diameter : The overall diameter of the pulley, disre-
garding protecting layers made of rubber, ceramic or similar
NOTES
material if they are exposed to wear.
1 The values indicated in this International Standard are minimum
values to be used in the absence of information provided by the
For crowned pulleys, the smallest diameter shall be at least
conveyor belt manufacturer.
the specified minimum.
2 The calculation of the minimum pulley diameter according to
this International Standard is valid for all general applications. For
special purposes the conveyor belt manufacturer may allow smaller 3 STANDARD PULLEY DIAMETERS
pulley diameters. For belts which are not listed in the following
0 tables, consult the manufacturer. The pulley diameters follow the steps of the R 10 (or R 20
for 1 400 mm and 1 800 mm) series of preferred numbers
3 In the case of use of pulleys with larger diameters than those
(see table 1).
which correspond to the minimum diameter calculated for the
recommended maximum belt tension, an increase of this maximum
tension is not permissible.
TABLE 1 - Standard pulley diameters
2 DEFINITIONS Values in millimetres
2.1 Belt structure (see figure 1) 1 O0 630
125 800
thickness of carcass, e : The distance between the highest
160 1 O00
points of the upper layer of fabric and the lowest points of
the lower layer.
200 1 250
250 (1 400)
2.2 Types of pulleys
1 600
315
Figures 2 to 5 show the different types of pulleys for belt-
400 (1 800)
conveyors.
500 2 O00
A : Drivingpulleys and pulleys exposed to high belt tension,
for example :
This table includes, particularly, all the values fixed by
IS0 1536,
...