SGR:Your trusted gearbox manufacturer for reliable, high-performance industrial solutions- Shanghai SGR Heavy Industry Machinery Co., Ltd.

When industrial equipment manufacturers source gearboxes, they are not simply buying a component—they are seeking a reliable, technically capable, and responsive transmission partner.

For small and medium-sized machinery producers, the ideal gearbox supplier must deliver consistent quality, proven durability, engineering support, and on-time delivery.

Above all, the gearbox must perform flawlessly under real-world operating conditions.SGR, a Shanghai-based manufacturer specializing in planetary gearboxes and double-enveloping worm gearboxes, has been meeting these exacting standards for over 15 years.

With deep expertise in mechanical transmission, SGR empowers OEMs across industries—from non-excavation drilling rigs to mining and textile machinery—with robust, precision-engineered drive solutions.

(1) SGR: 15+ Years of proven expertise in mechanical transmission

Founded on a foundation of engineering excellence, SGR has spent more than 15 years refining its capabilities in high-performance gearbox design and manufacturing. Our mission is simple: to deliver transmission systems that enhance the efficiency, reliability, and competitiveness of our customers’ equipment.Backed by a R&D team composed of doctoral-level engineers and senior technical experts, SGR has developed a fully integrated ecosystem for product development and quality assurance. This includes:

In-house planetary gear reducer design systems;
Proprietary optimization software for toroidal worm gear pairs;
Advanced manufacturing equipment such as 4-axis CNC complex surface grinders;
China’s first toroidal worm and hob measuring instrument;
Precision inspection tools including coordinate measuring machines (CMM);
Full-scale gearbox power performance testing platforms for load, efficiency, temperature, and vibration validation.

This vertically integrated approach ensures that every SGR gearbox is not only designed for performance but also rigorously tested under real operating conditions—before it ever reaches the customer.

(2) Core product Lines: planetary gearboxes & double-enveloping worm gearboxes

SGR focuses on two high-performance, high-demand gearbox technologies, each engineered for specific industrial applications.

High-torque planetary gearboxes

Designed for high power density and dynamic response, SGR planetary gearboxes are ideal for applications requiring compact size, high efficiency, and exceptional load capacity.

Key applications of SGR’s high-torque planetary gearboxes include:

Non-excavation horizontal directional drilling (HDD) rigs (both electric and hydraulic drive);
Small and medium-sized drilling equipment;
Generator sets;
Lifting and agricultural machinery.

These gearboxes feature hardened 20CrMnTi alloy steel gears, precision ground tooth profiles, and multi-stage planetary configurations to deliver torque outputs from 5,000 to over 500,000 Nm. With transmission efficiency exceeding 96% per stage, they reduce energy loss and heat generation—critical for continuous operation in demanding environments.

The gearbox manufacturer SGR can also customize planetary gearboxes according to your requirements.

Double-enveloping worm gearboxes (planar double-enveloping toroidal worm reducers)

Renowned for their high load capacity, smooth operation, and exceptional durability, SGR’s double-enveloping worm gearboxes are the preferred choice for heavy-duty industrial drives. The “double-enveloping” design means the worm and worm gear engage in a multi-tooth, line-contact meshing pattern, significantly increasing load distribution and reducing wear.

Typical applications of SGR’s double-enveloping worm gearboxes include:

Metallurgical rolling mills;
Mining conveyors and hoists;
Rubber and plastic machinery (e.g., extruders, mixers);
Glass manufacturing equipment;
Beverage and packaging filling lines.

These gearboxes offer high reduction ratios in a single stage, excellent shock absorption, and low noise—making them ideal for continuous, high-torque operations where reliability is non-negotiable.

The gearbox manufacturer SGR can also customize double enveloping worm gearboxes according to your requirements.

(3) Technology-driven innovation for superior product quality

At SGR, innovation is not a buzzword—it’s embedded in our DNA. We invest continuously in R&D to push the boundaries of gearbox performance, efficiency, and longevity.

Our proprietary double-enveloping worm pair optimization system enables precise tooth profile design, minimizing backlash and maximizing contact area. Combined with our 4-axis CNC grinding technology, we achieve micron-level accuracy in gear geometry—ensuring smooth meshing and extended service life.

Every SGR gearbox undergoes full-power endurance testing on our in-house test benches, simulating real-world loads, speeds, and thermal conditions. This allows us to validate performance, identify potential failure modes, and deliver products with proven reliability.For our customers, this means:

Reduced downtime due to gearbox failure;
Lower maintenance costs;
Longer equipment lifespan;
Faster time-to-market with reliable, pre-validated components.

Partner with SGR for performance, You can acquire a competitive industrial landscape, the right gearbox partner makes all the difference.

SGR combines 15+ years of engineering experience, cutting-edge manufacturing technology, and a customer-centric approach to deliver gearboxes that perform—day in and day out.Whether you need a compact planetary gearbox for a drilling rig or a heavy-duty worm reducer for a rolling mill, SGR provides the quality, reliability, and technical support your business demands.Choose SGR—where innovation meets industrial strength.(Author,SGR, Angie Zhang)

Email: export@sgr.com.cn

WhatsApp: +86 188 1807 0282

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