Hangzhou Donghua Chain Group Co.,Ltd. ( original
Hangzhou Donghua Chain general company), was founded in
November, 1991. With its five wholly owned subsidiaries,
including Hangzhou Ziqiang Chain Drive Co., Ltd and Jiangsu
Xinghua Gear Factory being a wholly owned company under
Donghua in 2007, it is a professional manufacturer of
chains, sprockets, tooth gears and various power
transmission products, and it is one of the top 500 domestic
private enterprises and the chain drive branch general of
China Mechanical General Components Industry Association.
The group has DONGHUA, ZIQIANG, and DUNPAI three brands
with DONGHUA has been recognized as China well known brand
in 2008, ZIQIANG chain was awarded with "famous product
of Zhejiang Province" and "famous brand of
Zhejiang Province". The group is focused on producing
all variety of standard roller chains and special chains,
such as conveyor chain, stainless steel chain, agricultural
chain and has not just sold its products all over china, but
also sold more than 65% products to oversees, including
Europe, America, South-east Asia, and it also has set up
storage logistics in places like Europe. With Donghua brand
registered in more than 70 countries like America , Europe
, Japan and so on, it has partners among world top
enterprises, such as JOHNDEERE, NEW HOLLAND, CLAAS, HONDA,
KUBOTA, YANMAR, etc.
There is a technical center of province level, Donghua
academician working station, experiment station for Donghua
post doctors, and national 863 program set up in Donghua
group. With these platforms and strong technical ability,
the more than 400 technicians have developed all variety of
special high precise and high strength products, conducted
mold programs for key components in the car and national
industry revitalizing program, resulting more than 5000
developed over, among which 33 items are autonomous patent
technology with 4 patent approved .The new products include
a series of high-tech and high quality chains, such as
chains for agricultural machineries, metallurgical chains,
escalator step-chains, high-speed tooth chains, timing
chains, self-lubrication chains, among which have type high
speed tooth chain for car branch dynamic box and aerial
chains fill in the blanks of chain in China. The group has
taken part in the making and revising of ISO/TC100
international chain standard several years in success and
hosted the 16th ISO/TC100 International annual meeting in
2004. It has established stable cooperation with many well
known universities and institutes in china such as, Zhejiang
University, Jilin University, Technical committee of
national chain drive standard, Institute of national chain
drive, Zhejiang application engineering material institute,
Huhan material protection institute; and it cooperated to
found China First Car chain institute with National chain
drive institute.
The high precise CNC equipment, such as Slow-feeding
wire-cut machine, jig grinding machine and electric
discharge machine, ensures the top quality precision of
mould processing, with the high efficient and environmental
protection acid rolling line being the largest raw material
converting equipment in the field in china; The wildly use
of automatic milling machine, high-speed automatic feeding
punch, high speed automatic rolling and assembling machine
guarantees the high quality and efficiency of components and
chain making. Advanced thermo treatment equipment, such as
network heat treatment oven, multi-use thermo treatment
oven, etc. ensures the stability and consistency of the key
function of components.
Donghua has set up a complete set of quality management
system which is provided with advanced inspection and test
equipment. Donghua has been successfully certified by
ISO9002 Quality Management System, ISO9001 Quality
Management System, API certificate, ISO/TS16949:2002 and
ISO10012 measurement management system. In 2008, it was
awarded with "National Export Commodity
Inspection-free Enterprise". Full use has been made of
all kinds of advanced techniques and technology to reach
excelsior manufacturing. Every process, every section, every
function in Donghua is demanded to be done one step
following another, carefully and cautiously, from material
selection, reformation to manufacturing accessories, from
components heat treatment to automatic assembly, from
quality control to product inspection and testing and from
order dealing to after sales service.
Great attention has been paid on environmental
protection and energy saving. The product well displays
environmental protection and energy saving. In 2000, Donghua
took the lead in gaining ISO14001 environment management
certificate and thereafter passed the inspection of clean
production and recycling economy, winning the title of
"Zhejiang Green Enterprise".
"We are always serving our customers with our best
products." Donghua will always adhere to it enterprise
spirit of being practical, innovative, efficient and
excellent to make the top international chain drive.