GB/T 33513-2017 English PDF (GBT33513-2017)

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GB/T 33513-2017: Belt drives -- Pulleys and V-ribbed belts for the automotive industry -- PK profile: Dimensions
GB/T 33513-2017
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 21.220.10
G 42
Belt drives - Pulleys and V-ribbed belts for the
automotive industry - PK profile. Dimensions
(ISO 9981.1998, MOD)
ISSUED ON. FEBRUARY 28, 2017
IMPLEMENTED ON. SEPTEMBER 1, 2017
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration Committee.
3. No action is required - Full-copy of this standard will be automatically and
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Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Pulley ... 4 
4 V-ribbed belt ... 8 
Annex A (Informative) Comparison on structure modification between this
Standard and ISO 9981.1998 ... 12 
Annex B (Informative) Technical differences and reasons between this
Standard and ISO 9981.1998 ... 13 
Foreword
This Standard was drafted in accordance with the rules given in GB/T
1.1-2009.
This Standard uses redrafting method to modify and adopt ISO 9981.1998
Belt drives - Pulleys and V-ribbed belts for the automotive industry - PK profile.
Dimensions.
Compared with ISO 9981.1998, there are many modifications in this Standard
in structure. Annex A lists the contracts on sub-clause number between this
Standard and ISO 9981.1998.
There are technical differences between this Standard and ISO 9981.1998.
The sub-clauses covered by these differences have been identified by the
vertical single line (︱) at the margin of the outer margin. Annex B gives a list
of the corresponding technical differences and reasons.
This Standard also made the following editorial modification.
- deleted the descriptions of pulleys and V-ribbed belts used for industry
in the scope.
This Standard was proposed by China Petroleum and Chemical Industry
Federation.
This Standard shall be under the jurisdiction of Subcommittee on Friction
Type Belt Drive of National Technical Committee on Pulleys and Belts of
Standardization Administration of China (SAC/TC 428 / SC 3).
The drafting organizations of this Standard. Qingdao Institute of product
quality inspection technology, Ningbo Kai Chi Tape Co., Ltd., Hubei Maoxin
Special Tape Co., Ltd., Laiwu Yong Chi Rubber Co., Ltd., Zhejiang Zijin Port
Tape Co., Ltd., Henan Golden Jiulong Industrial Co., Ltd.
Main drafters of this Standard. Wu Guiqing, Hao Yongliang, Ying Jianli, Xiong
Lijun, Chen Yuezeng, Pang Changzhi, Zhang Liujie.
Belt drives - Pulleys and V-ribbed belts for the
automotive industry - PK profile. Dimensions
1 Scope
This Standard specifies the main dimensions of PK profile ring V-ribbed belts
and pulley grooves for automobile auxiliary transmission.
This Standard is applicable to ring V-ribbed belts and pulleys for PK profile
automobile auxiliary transmission.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including
any amendments) applies.
GB/T 1184-1996, Geometrical tolerancing - Geometrical tolerance for
features without individual tolerance indications (egv ISO2768-2.1989)
GB/T 3505, Geometrical product specifications (GPS) - Surface texture.
Profile method - Terms definitions and surface texture parameters (GB/T
3505-2009, ISO4287.1997, IDT)
GB/T 11357, Quality roughness and balance of transmission pulleys (GB/T
11357-2008, ISO 254.1998, MOD)
GB/T 17516.2, V-and ribbed belts drive - Dynamic test to determine pitch
zone location - Part 2. V-ribbed belts (GB/T 17516.2-1998, idt ISO
8370-2.1993)
3 Pulley
3.1 Groove size and tolerance
The groove size shall comply with Table 1 (see Figure 1, Figure 2).
4.2.1.1 Two measuring pulleys of equal diameter, one of which is stationary,
and the other is movable along the track. Its recommended effective diameter
is determined by the value in Table 4. See Figure 1 and Table 1 for pulley
groove sizes.
4.2.1.2 Measuring force application device. used for applying a measuring
force on a movable pulley.
4.2.1.3 Center distance measuring device. used to measure the distance
between the two pulley centers.
4.2.2 Measuring force
See Table 4 for the measuring force used to measure the effective length of
the belt.
Table 4 -- Measuring pulley parameters and measuring force
Item Value
Pulley effective circumference (at effective diameter) Ce / mm 300
Pulley diameter at outer edge of testing ball or column K / mm 96.48 ± 0.13
Measuring force per wedge F / N 100
4.2.3 Measurement procedures
When measuring the effective length of the belt, it shall mount the pulley to
the measuring device first. After applying the specified measuring force, the
belt is rotated over at least two turns so that it wedges well into the pulley and
evenly distributes the total measuring force across the two straight sections of
the belt. Then measure the center distance between the two pulleys.
Calculate the effective length of the belt according to formula (1), exposed
height of the belt according to formula (2).
where,
Le - effective length of belt, in millimeters (mm);
Ce - effective circumference of testing pulley, in millimeters (mm);
amax - maximum measured value of pulley center distance, in millimeters
(mm);
amin - minimum measured value of pulley center distance, in millimeters (mm).