Combination Reducer Manufacturers

Combination Reducer Manufacturer – Shanghai SGR Heavy Industry

As a Combination Reducer manufacturer and factory, Shanghai SGR Heavy Industry Machinery Co., Ltd. designs and builds integrated gear drives that combine the high torque density of planetary stages with the self-locking capability and smooth operation of toroidal worm gearing. Our combination reducers are engineered for applications where space is limited, output torque is high, and reliability under shock loads is non-negotiable.

With over 15 years of focused experience in gear transmission, we supply custom combination reducers to industries such as marine salvage, mud pumps, crushers, cranes, and battery plate rolling. Our in-house R&D team, advanced CNC machining, and rigorous testing ensure each unit meets your exact performance and durability requirements.

Our Combination Reducer Range

We offer a specialized line of combination reducers, primarily the planetary and toroidal worm combined reducer. This hybrid design delivers the best of both worlds: high reduction ratios and compactness from the planetary stage, plus the high shock resistance and quiet operation of the toroidal worm stage.

Our planetary and toroidal worm combined reducer is available in multiple frame sizes and can be configured with different input flanges, output shafts, and mounting options to match your drivetrain.

Engineering and Customization

We understand that each application has unique load profiles and space constraints. Our engineering team works directly with you to define the optimal combination of planetary and worm stages, ensuring the reducer delivers the required torque, speed, and efficiency while fitting within your envelope.

• Ratio selection: We calculate the ideal split between planetary and worm stages to achieve your target output speed and torque.
• Material and heat treatment: Gears are made from case-hardened alloy steel, ground for precision; worm wheels use high-grade bronze for wear resistance.
• Mounting flexibility: Foot, flange, or shaft-mounted designs available to suit your installation.
• Sealing and protection: Options for IP65+ protection, special coatings, and high-temperature or low-temperature lubricants.

Application Fit and Performance

Combination reducers are ideal for applications requiring high reduction ratios in a compact package, often with intermittent or reversing loads. The planetary stage provides high efficiency and torque density, while the toroidal worm stage adds shock absorption and can offer self-locking when the worm lead angle is small.

Typical installations include:

• Material handling: Cranes, hoists, and conveyors where precise positioning and high holding torque are required.
• Heavy machinery: Crushers, shredders, and mixers subject to high shock loads.
• Marine and offshore: Winches, salvage boats, and mud pumps that demand corrosion resistance and reliability.
• Industrial processing: Battery plate rolling, palm oil equipment, and other continuous-duty processes.

Quality Assurance and Testing

Our factory is ISO 9001 certified, and we operate a dedicated testing laboratory. Each combination reducer undergoes a full-load performance test to verify efficiency, temperature rise, and noise levels before shipment. We use a power and efficiency test system to ensure the unit meets your specifications.

We also have in-house measuring instruments, including a toroidal worm and hob measuring device (a first in China) and 3D coordinate measuring machines, to guarantee gear accuracy and profile conformity.

Installation, Maintenance, and Support

We provide comprehensive documentation with every unit, including installation manuals, lubrication schedules, and maintenance guidelines. Our support team is available for pre-sales engineering consultation and after-sales troubleshooting. We can also supply spare parts and service kits to minimize downtime.

Information We Use to Configure Your Solution

To prepare an accurate proposal and quotation, please provide the following details:

• Input speed (RPM) and motor power (kW or HP)
• Required output speed (RPM) or reduction ratio
• Output torque (Nm) and service factor
• Duty cycle and load characteristics (continuous, intermittent, shock)
• Mounting orientation and space constraints
• Ambient temperature, humidity, and any corrosive or hazardous environment
• Preferred shaft arrangement (solid, hollow, splined) and mounting type
• Any applicable standards or certifications (CE, ATEX, etc.)

Frequently Asked Questions

What is the difference between a combination reducer and a standard gearbox?

A combination reducer integrates two different gear technologies—typically planetary and worm—in a single housing. This allows for higher reduction ratios and better torque density than a single-stage worm or planetary unit, while also providing the shock resistance and self-locking capabilities of worm gearing.

Can you customize the combination reducer for my specific application?

Yes, we specialize in custom solutions. We can adjust the ratio, shaft configurations, mounting flanges, and materials to meet your exact requirements. Our R&D team will work with you to ensure optimal performance.

What is the typical lead time for a custom combination reducer?

Lead time depends on the complexity and quantity. For standard configurations, we can often ship within 30-45 days. Custom designs may take longer, but we will provide a clear schedule during the quotation phase.

Do you provide after-sales support and spare parts?

Absolutely. We offer a 1-year warranty on all gearboxes and provide spare parts, maintenance kits, and technical support throughout the product's lifecycle. Our team is available via email, phone, or WhatsApp.

What industries have your combination reducers been used in?

Our combination reducers have been deployed in marine salvage boats, mud pumps, crushers, cranes, battery plate rolling lines, and palm oil processing equipment, among others. We have extensive experience in heavy-duty and harsh environments.