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Heavy Gearbox for Crane
Description:
Heavy-duty crane reducers/gearboxes are the core power transmission units for overhead cranes (bridge cranes) and gantry cranes. They convert high-speed low-torque power from motors into low-speed high-torque output, to drive hoisting, trolley travelling, long travelling and other mechanisms. Designed for heavy shock load, frequent start-stop, intermittent duty and harsh working environments, these gearboxes guarantee safe, stable and precise heavy-load lifting and positioning.
We supply both standard units and bespoke heavy-duty reducer solutions, especially custom development for large-tonnage cranes. We can provide products from well-known domestic and international reducer brands, with full engineering support for selection, modification and on-site replacement.
Application:
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Main hoisting mechanism of overhead cranes & gantry cranes (port, steel mill, hydropower station, heavy industry workshop, stockyard)
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Trolley cross-travel and crane long-travel drive mechanisms
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Special heavy-lift equipment: casting cranes, ladle cranes, nuclear cranes, shipyard gantry cranes, pump-storage hoisting cranes
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Retrofit & replacement of old crane gearboxes, upgrading for higher tonnage and heavier working duty
Main Types & Details:
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Helical parallel shaft reducer
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Most widely used for travelling mechanisms and medium-heavy hoisting. Stable running, low noise, high efficiency, easy maintenance. Common series: ZQ, ZSY, ZDY.
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Helical-bevel (bevel-helical) reducer
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Used when power transmission direction changes. Compact layout, suitable for trolley and integrated hoist drives.
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Planetary gear reducer
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High torque density, small footprint, large overload capacity. Preferred for large-tonnage main hoisting, compact winch systems.
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Three-point support crane dedicated reducer
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Professional crane structure, flexible mounting (horizontal / inclined), strong anti-shock performance, widely adopted for hoisting mechanism.
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Large synchronous double-input & double-output heavy gearbox
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For ultra-large tonnage cranes, realizes synchronous dual-side lifting, equipped with independent lubrication cooling and anti-reverse ratchet safety device.
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Features:
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Hardened & ground gear teeth (carburizing quenching), strong impact resistance, high load capacity
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High transmission efficiency (single stage ≥98%), low vibration, low noise
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Heavy cast alloy housing, fatigue resistant for frequent start-stop and shock load
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Optional forced lubrication + cooling system for continuous heavy-duty operation
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Built-in anti-reverse, overload protection interface for lifting safety
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Flexible customization: gear ratio, output shaft form, mounting flange, lubrication, sealing, brake interface
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Adapt to different crane working classes: A3 ~ A8 heavy duty
Technical Parameters:
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Matching crane tonnage: 5t ~ 1200t (custom ultra-large tonnage available)
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Input power range: 1.5kW ~ 1000kW
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Nominal transmission ratio: 10 ~ 400, non-standard ratio customizable
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Output torque: up to 2,000,000 N·m
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Gear accuracy grade: ISO 6 / AGMA 11
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Working temperature: -20℃ ~ +60℃; low-temperature sealing & heating system optional
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Mounting: horizontal, vertical, three-point suspension, flange mounting
Brands We Supply:
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International famous brands: FLENDER (Siemens), SEW, NORD, Bonfiglioli, Zollern, SUMITOMO
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Domestic famous brands: Taiyuan Heavy Industry (TZ), Guomao, Jiepai, Jiangsu Tailong, etc.
Our Customization Advantage:
We focus on large-tonnage custom heavy-duty crane reducers. According to your crane load, working duty, space limitation, torque requirement and old equipment drawing, our engineering team completes custom design, calculation, manufacturing and test.
We support: non-standard center distance, special shaft connection, synchronous double output, integrated brake, forced oil lubrication, explosion-proof, low-temperature, marine anti-corrosion version, and one-stop brand selection service.