QRChains.com | Premium Industrial Chains & Sprockets Manufacturer

About QRChains

Hangzhou Qianrui Chain Manufacturing Co., Ltd specializes in the research, development, and production of industrial transmission and conveying chains. With years of expertise, we deliver reliable, high-tensile strength chains that meet international standards including ISO, ASME/ANSI, DIN, and JIS.

Our product range includes standard roller chains, conveyor chains, leaf chains, agricultural chains, flat top chains, and sprockets — engineered for durability, precision, and performance across diverse industrial environments.

ISO & ANSI Compliant Manufacturing
Advanced Heat Treatment Technology
Global Distribution Network
Custom Chain Solutions Available

Our Product Range

Engineered for strength, precision, and longevity — our chains meet the highest international standards and are trusted by industries worldwide.

Short Pitch Precision Roller Chain (A Series)

Conforms to ISO, ANSI, DIN, JIS standards. Ideal for high-speed power transmission with excellent wear resistance and fatigue strength.

• ISO/ANSI/DIN/JIS compliant
• High tensile strength
• Precision roller design

Heavy Duty Series Roller Chain (A/B Series)

Built with premium materials and advanced processing. Tensile strength exceeds ISO minimum by 1.15x. Perfect for demanding industrial applications.

• 1.15x ISO tensile strength
• Enhanced fatigue resistance
• Suitable for heavy loads

Conveyor Chain with Attachments

Designed for material handling systems. Features extended pins and attachments for connecting equipment and synchronizing movement.

• High wear resistance
• Extended pin options
• Customizable attachments

Leaf Chain

High-strength leaf chains for forklifts, lift trucks, and other lifting equipment. Designed for vertical load applications with minimal elongation.

• High load capacity
• Low elongation
• Precision manufacturing

Agricultural Chain

Robust chains designed for farm machinery, harvesters, and tractors. Resistant to dirt, moisture, and harsh operating conditions.

• Corrosion-resistant
• High durability
• Optimized for outdoor use

Stainless Steel Chain

Corrosion-resistant chains ideal for food processing, chemical, and marine environments. Available in short pitch, double pitch, and extended pin variants.

• Food-grade compliance
• Rust-proof construction
• Hygienic design

Hollow Pin Chain

Versatile chain with hollow pins allowing for attachment of cross rods, tools, or custom components. Used in assembly lines and special machinery.

• Customizable connections
• High flexibility
• Durable construction

Sprockets

Precision-engineered sprockets designed to perfectly match our roller chains. Ensures smooth engagement, reduced wear, and optimal power transmission.

• Matched to chain pitch
• Hardened teeth
• Multiple tooth configurations

Flat Top Chain

Ideal for conveyor systems in packaging, bottling, and food processing. Modular design allows for easy cleaning and maintenance.

• Easy to clean
• Modular construction
• Smooth surface finish

Cotter Type Short Pitch Chain

Designed for transportation and transmission systems. Offers versatility and reliability with multiple structural configurations.

• Universal design
• Diverse configurations
• High reliability

Why Choose QRChains?

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Precision Engineering

All chains are manufactured to exact ISO, ANSI, DIN, and JIS specifications for perfect fit and performance.

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High Durability

Advanced heat treatment and high-quality materials ensure long service life under heavy loads.

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Global Standards

Products meet international standards and are trusted by clients across continents.

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Custom Solutions

We offer tailored chain designs and attachments to meet unique industrial needs.

Frequently Asked Questions

What standards do your chains comply with?

Our chains conform to ISO, ASME/ANSI, DIN, JIS, and other international standards depending on the series and application.

Can you provide custom chain solutions?

Yes, we offer customization including special attachments, extended pins, material selection (including stainless steel), and non-standard pitches.

What industries use your chains?

Our products are used in agriculture, food processing, packaging, automotive, material handling, construction, and lifting equipment.

Do you offer sprockets to match your chains?

Yes, we manufacture precision sprockets designed to perfectly engage with our roller chains for optimal performance and longevity.

What is the advantage of hollow pin chains?

Hollow pin chains allow for the insertion of cross rods, tools, or attachments, making them ideal for assembly lines and specialized conveying systems.

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