Hangzhou Polywin Machinery Co., Ltd.

05/01/2026

👉 Your chains deserve a mark of quality
Add permanent steel stamps to chains in SECONDS ⚡
Our Chain Marking Machine = Clear branding + 100% traceability

31/12/2025

Wishing you a prosperous Year of the Horse!🐴 The horse represents vitality, progress, and new opportunities—qualities we hope will inspire a fruitful connection in the coming year. We’d be honored to support your goals in 2026.
Happy New Year!

14/12/2025

Industrial Chains: Find the Right Grade for Your Lifting, Transport & Security Needs

Choosing the correct chain is critical for safety, efficiency, and compliance. Find your perfect match below.

Only Grade 80 chain, Grade 100 chain, and Grade 120 chain are approved for overhead lifting and slings, these heat-treated alloy steel chains offer superior strength-to-weight ratios.

Grade 120 Alloy Chain: The strongest available, up to 50% stronger than Grade 80. Its higher alloy content enhances abrasion resistance.

Grade 100 Alloy Chain: The evolving industry standard, offering ~25% higher working load limits than Grade 80. Its higher alloy content provides greater fatigue resistance for a longer lifespan.

Grade 80 Alloy Chain: A strong, durable standard for lifting, recovery, and safety. This chain is quenched and tempered and proof tested.

Grade 70 Transport Chain: Designed for load securement and tie down, these chains comply with transportation safety regulations.

Grade 50 stainless steel chain: is highly resistant to salt water and chemicals. Its uses include food processing, marine, fishing and industrial applications where high corrosion resistance is required.

Grade 43 chain and Grade 30 chain: are good options for tie down, applications in the agriculture, construction, and trucking industries.

All above chains can be produced by our company’s machines. We, Hangzhou Polywin Machinery Co., Ltd., located in Hangzhou, China, specializes in the manufacturing and export of chain production machines.
Our comprehensive product line includes (all automatic machines):
• Chain Bending Machine
• Chain Welding Machine
• Chain Calibration Machine
• Chain Proof Testing Machine
• Chain Cutting Machine
• Chain Marking Machine
• Tyre chain making machines (Chain Twisting Machines, V-bar Welding Machines, Stud Welding Machines etc.)
• Chain Heat Treatment Machines
• Customized machines according to clients’ requirements
With over 20 years of technology and experience, our machines – built on a foundation of high technology and continuously improved – are exported worldwide to countries.

13/12/2025

Beijing's first snow! ❄️
The ancient capital turns soft and white.
Everything looks quieter, prettier.
The most wonderful gift of winter.

12/09/2025

12/09/2025

Good value Chain welding machine, for making low-grade chains.

02/07/2025

Our company's Automatic Chain Welding Machines are available in both standard and variable frequency models.
★★★ The advantages of the variable frequency version are as follows:
① The variable frequency welding current controller ensures balanced three-phase current, increasing efficiency by 150% using the same power transformer.
② Power consumption savings typically range at least 25%.
③ With built-in energy storage capacitors in the frequency converter, grid current during welding is reduced. This minimizes voltage fluctuations on the power grid, decreases line voltage drop, and reduces circuit losses.
④ Power factor reaches over 95% (compared to 65% for conventional two-phase models).
⑤ Reduced line voltage drop ensures stable voltage with minimal fluctuations during each welding cycle, guaranteeing consistent and reliable welding quality.


For more information about Automatic Chain Welding Machine, please contact us by email [email protected]. 😊

15/03/2025

Automatic industrial valves testing machine, Test benches for industrial valves, Customized machine,

15/03/2025

Double J hook making machine.

06/03/2025

We are one of most professional experienced Chain Making Machine manufacturers and suppliers in China . With more than 20 years accumulation of technology , our products have covered almost all process of chain production , these machines inculde Chain Bending Machine, Chain Welding Machine, Chain Calibrating Machine, Chain Proof Testing Machine, Chain Cutting Machine,Chain Marking Machine, Tyre Chain Making Machine ( V bar / Stud making , Chain Twisting , V bar Welding and Stud Welding Machines ), and Chain Heat Treatment Machine etc. And 80G 100G chain and accessories .

Somos um dos fabricantes e fornecedores de máquinas de correntes mais profissionais e experientes na China. Com mais de 20 anos de conhecimento e tecnologia, nossos produtos abrangem quase todos os processos de produção de correntes. Nossas máquinas efetuam a dobra, solda, calibração, marcação, corte e teste de correntes. Em nosso portifólio, possuímos também máquinas de fabricação de correntes para pneus (fabricação de barras em V / pinos, torção de correntes, soldagem de barras em V e máquinas de soldagem de pinos) e máquinas de tratamento térmico de correntes. Fornecemos também correntes e acessórios de 80G e 100G.

03/01/2025

Happy new year! 2025 is the Year of the Snake (from the Chinese Zodiac).
May you shed your old skin and emerge stronger and wiser this year of the snake.

26/12/2024

Automatic chain cutting machine, cuts chains as your requirements.