Professional Purpose Reducer Manufacturers

Professional Purpose Reducer Manufacturer

Shanghai SGR Heavy Industry Machinery Co., Ltd. is a Professional Purpose Reducer manufacturer and supplier based in Shanghai, China. We design and build custom gear reducers for applications that demand more than a standard catalog unit—where load conditions, hygiene requirements, or space constraints require a dedicated transmission solution. Our range includes planetary gearboxes, double-enveloping worm gearboxes, cylindrical worm gear reducers, and combination reducers, all engineered to meet specific operational targets.

With over 15 years of gear transmission experience and a 15,000 m² factory, we support projects from initial concept to series production. Our engineering team, composed of PhDs and senior engineers, has developed proprietary technologies such as the Four-Axis Linkage Complex Profile Grinding Machine and the Planar Double-Enveloping Worm Gear Optimization Design System. These capabilities allow us to deliver reducers with high precision, low noise, and long service life for industries including pharmaceutical, marine, mining, construction, and renewable energy.

Our Product Range and Application Fit

We offer a broad portfolio of reducers, each suited to specific duty cycles and mounting requirements. The table below summarizes our main product families and their typical applications.

For example, our TOP Annular Worm Gear Reducer for Tablet Presses is a dedicated solution for high-speed rotary tablet presses. It uses a precision-ground planar enveloping toroidal worm gear pair made of high-strength alloy steel, achieving multi-tooth synchronous meshing. This design provides low backlash (<1 arc-minute), high transmission accuracy, and excellent lubrication, ensuring stable operation even under periodic high-impact loads. The housing is cast from ductile iron for rigidity and vibration damping, and all sealing parts meet GMP and food-grade hygiene standards, making it suitable for cleanroom environments.

Engineering and Customization Approach

We understand that every application has unique requirements. Our engineering process begins with a thorough analysis of your operating conditions, including torque, speed, duty cycle, ambient temperature, and mounting constraints. We then select the appropriate gear type, materials, and configuration. Our R&D team can develop custom reducers based on your drawings or samples, or we can propose modifications to existing designs to optimize performance.

Key customization options include:

• Gear ratios from i≥10 up to high reduction combinations
• Input configurations: IEC motor flanges, shaft input, or direct coupling
• Output options: solid shaft, hollow shaft, splined, or custom flanges
• Materials: case-hardened alloy steel for gears, copper alloy for worm wheels, ductile iron or steel housings
• Sealing and lubrication systems for food-grade, cleanroom, or high-temperature environments
• Backlash levels from standard to ultra-low (<1 arc-minute)

Quality Assurance and Testing

Our factory is ISO 9001 certified and DNV-accredited. We operate a comprehensive quality control system that includes in-process inspections and final testing. Our laboratory is equipped with advanced instruments, including a domestically innovated Toroidal Worm and Hob Measuring Instrument (the first in China), 3D coordinate measuring machines, and a gearbox power and efficiency test system. These tools allow us to verify geometric accuracy, material integrity, and performance under load.

Each reducer undergoes a full-load test before shipment, where we measure efficiency, temperature rise, noise, and vibration. We also provide test reports and certificates upon request, ensuring full traceability.

Integration and Installation Support

We support you from the initial specification to commissioning. Our team can assist with motor selection, coupling design, and control system integration. For automated lines, we ensure that the reducer's mounting dimensions and shaft extensions match your existing equipment. We also provide installation manuals and on-site guidance if needed.

Our reducers are designed for easy maintenance, with accessible lubrication points and replaceable seals. We offer spare parts kits and provide documentation for routine servicing.

Information We Use to Configure Your Solution

To prepare an accurate proposal, we need the following project information:

• Required output speed (rpm) and torque (Nm) or input power (kW)
• Duty cycle: continuous, intermittent, or reversing loads
• Operating environment: temperature, humidity, dust, washdown, or cleanroom
• Mounting position and available space envelope
• Input source: motor type, speed, and flange dimensions
• Output shaft requirements: diameter, keyway, hollow bore, or flange
• Any applicable standards or certifications (e.g., GMP, ATEX, CE)
• Expected service life and maintenance intervals

With this data, our engineers can select the optimal gearbox type, calculate service factors, and provide a detailed quotation with drawings and performance data.

Frequently Asked Questions