Precision Custom Mechanical Parts

China's Top 5 Custom Automation Parts Manufacturer – 20+ Years of Excellence in Gears, Sprockets, Shafts, and CNC Fabrication. ISO-Certified, Exporting to 75+ Countries.

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About GRANGIN

GRANGIN is a nationally recognized high-tech enterprise and one of China’s top 5 custom automation parts manufacturers. With over 20 years of specialization in non-standard mechanical components, we deliver precision-engineered solutions for industrial automation, agricultural machinery, and conveying systems.

Certified with ISO 9001, ISO 45001, and ISO 14001, our 10,000+ sqm factory in Zhejiang employs over 100 skilled professionals, producing 25,000+ parts monthly with tolerances as tight as ±0.005mm.

20+

Years of Experience

75+

Countries Served

Our Product Range

Fully supports custom drawings and 80+ materials. No MOQ, one-stop service from design to packaging.

Precision Worm Gear

● Customizable
● Excellent material
● Stable structure
● Various specifications

Double Threaded Worm Gear

● Customizable
● Excellent material
● Stable structure
● Various specifications

Brass Worm Gear

● Customizable
● Excellent material
● Stable structure
● Various specifications

Standard Helical Gears

● Customizable
● Excellent material
● Stable structure
● Various specifications

Industrial Ball Screw

● High Load Capacity
● Reliable Performance
● Robust Design
● Multiple Sizes Available

Industrial Synchronous Pulley

● Customizable
● Excellent material
● Stable structure
● Various specifications

Steel Gear Shaft

● Customizable
● Excellent material
● Stable structure
● Various specifications

Industrial Spline Shaft

● Customizable
● Excellent material
● Stable structure
● Various specifications

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Why Choose GRANGIN?

Excellence, Undeniable. We deliver end-to-end solutions for your cyclic production demands.

Expert Customization

Chief engineer with 30+ years in automation. Average engineering team tenure exceeds 15 years. Comprehensive 3D custom design blueprints provided.

Quality Assurance

ISO 9001, ISO 45001, and ISO 14001 certified. Strict control of production quality inspection. High precision, high hardness, good materials.

One-Stop Service

From design to production to packaging. No MOQ, more flexibility. Professional export packaging for global delivery.

One-to-One Design

Dedicated engineering support for your unique requirements. Tailored solutions for agricultural machinery, conveying equipment, and industrial manufacturing.

Global Export

Exported to 75+ countries for over 20 years. Trusted by enterprises worldwide for reliable, high-performance mechanical components.

Award-Winning

Named "Science and Technology Little Giant" in 2023. Awarded "Integrity Enterprise" and "Grade-A Taxpayer" by Chinese authorities.

20+

Years in Business

10K+

Factory Area (sqm)

100+

Team Members

25K+

Monthly Output

Frequently Asked Questions

Yes, we fully support custom drawings. If you have the drawings, please email us directly at [email protected] for a quick quote.

We work with over 80 materials including carbon steel, stainless steel, aluminum, brass, and various engineering plastics.

We have no MOQ, offering maximum flexibility for prototyping, small batches, and large-scale production.

Our manufacturing tolerances are as tight as ±0.005mm, ensuring high precision and interchangeability.

Yes, we are certified with ISO 9001 (Quality), ISO 45001 (Safety), and ISO 14001 (Environmental) standards.

Get in Touch

Have questions about our custom mechanical parts? We're here to help you find the right solution.

For fastest response, please contact us through our official website.

Visit Official Website

Or email us directly: [email protected]

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