

Shanghai Ronjee Machinery | Custom Gears & Shafts for Transmission Industry
Drawings Customization & Sample Reverse Engineering

Two Customization Modes, One Stop Solution
Accept CAD Drawings & Sample Reverse Development, Fast Quotation & High Precision

Professional Manufacturer & Continuous Product Updates
New Products Launched Regularly, Adapt to Industry New Demands
Why Choose Shanghai Rongjee Machinery?
Meet the professionals behind our success, each bringing unique expertise and passion to our mission.

Dual Customization Modes
We support both drawing‑based customization (accepting CAD, STEP, PDF and other drawing formats) and sample‑based reverse engineering. For customers with only samples but no complete drawings, we can accurately restore product parameters using professional testing equipment to achieve reverse development, saving your design cost and time.

Fast Response & High Efficiency
We promise: 24‑hour quotation for drawing customization, 3 working days for the initial reverse engineering plan, and a shorter production cycle than the industry average. Our professional team responds to your needs in real time, solving pain points such as slow communication and long customization lead times.

Strict Quality Control
Equipped with advanced CNC hobbing machines, gear grinding machines, coordinate measuring machines (CMM) and other precision equipment, we carry out full‑process quality control from raw material selection to finished product delivery, ensuring every product meets international precision standards (tolerance ≤±0.005mm). ISO 9001 certified for reliable and trustworthy quality.

Professional & Localized Service
Our team has over 10 years of experience in gear and shaft customization, and is familiar with the transmission industry requirements across various countries. We offer one‑on‑one customer service, support multilingual communication (English, Spanish, German, etc.), and resolve your inquiries promptly.

Continuous Product Updates
We have a professional R&D team that keeps a close eye on the latest technologies and market demands in the global transmission industry. We launch new customized gear and shaft products every quarter, update product parameters and technical solutions in real time, and provide customers with more options and more suitable personalized solutions.
Comprehensive Gear Solutions
Innovative designs for every application.
Our Custom Services

Our All Services
We provide one-stop customized manufacturing services for gears, shafts and gearboxes.
● For gears and shafts, we support production per your 2D drawings with specified material, tolerance, heat treatment, surface requirements and quantity.
● We also offer reverse engineering, modeling and mass production from physical samples.
● For gearbox customization, please supply 2D/3D drawings of all components with full technical specifications, together with the complete assembly drawing.
Our one-stop solution covers drawing customization, sample reverse engineering, CAD modeling, machining, heat treatment, surface treatment and full gearbox assembly for mass production.

Drawing-Based Customization
We accept all major drawing formats, including CAD, STEP, PDF and DWG. According to your specific requirements for material, precision, dimensions and application scenarios, we can customize gears and shafts to fully meet your transmission needs. Our professional engineers are available to optimize your drawings as needed to further enhance product performance and reliability.

Sample-Based Reverse Engineering
If you only have samples instead of technical drawings, we can perform precise measurement and analysis using coordinate measuring machines (CMM) and professional gear analyzers. We will reconstruct 3D models and technical parameters to complete reverse engineering, ensuring customized products are fully consistent with your samples in dimensions, performance and appearance.
















