Gearbox/Reducer for Slewing Drives | Specifications & Selection

Product Specifications

Technical details and manufacturing context for Gearbox/Reducer

Definition

A gearbox, also known as a reducer, is a critical component of slewing bearing and drive systems. It transmits power from the motor to the slewing ring, providing precise speed reduction and torque multiplication to enable controlled rotational movement of heavy loads in applications such as cranes, excavators, and wind turbines. The gearbox is designed to handle high radial and axial loads while maintaining accurate positioning. It typically uses a system of gears—such as planetary, helical, or worm gears—to achieve the desired reduction ratio. The housing is commonly made of cast iron (e.g., HT250) for strength and damping, though other materials may be used depending on the application. Key parameters include rated output torque (100–5000 N·m), reduction ratio (5–100), input speed (500–3000 rpm), efficiency (90–97%), backlash (≤0.1 deg, per ISO 1328), operating temperature (-20 to 60 °C), ingress protection (IP54–IP65, per IEC 60529), weight (10–500 kg), service factor (1.0–2.0, per ISO 6336), and noise level (≤75 dB(A), per ISO 8579-1). These values are reference ranges and must be verified for the specific model and application. The gearbox is selected based on required torque, speed, mounting configuration, and environmental conditions. Proper installation, lubrication, and maintenance are essential for reliable operation. Signs of wear include increased noise, vibration, or backlash. Overloading or exceeding input speed limits can cause overheating and premature failure. Always consult the legal manufacturer or supplier to confirm model-specific values and compliance with applicable standards.

Working Principle

The gearbox operates on the principle of gear ratio multiplication. Input power from the motor drives a primary gear, which engages with secondary gears to reduce output speed while proportionally increasing output torque. For example, a reduction ratio of 10:1 means the output speed is one-tenth of the input speed, while the torque is multiplied by approximately ten (minus efficiency losses). The specific gear arrangement—planetary, helical, or worm—determines the efficiency, backlash, and load capacity. The gearbox is designed to transmit power from the motor to the slewing ring, enabling controlled rotation of heavy loads. The housing supports the gears and maintains proper alignment, while seals and bearings protect internal components from contamination and wear.

Common Materials

Alloy Steel, Cast Iron, Hardened Steel Gears

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Output Torque	100–5000 N·m	Determines the size of the gearbox; higher torque requires larger unit.
Reduction Ratio	5–100	Ratio of input to output speed; affects torque multiplication.
Input Speed	500–3000 rpm	Maximum allowable input speed; exceeding may cause overheating.
Efficiency	90–97 %	Higher efficiency reduces energy loss and heat generation.
Backlash	≤0.1 deg	Critical for positioning accuracy; lower is better for precision applications.ISO 1328
Operating Temperature	-20–60 °C	Outside this range, lubricant performance degrades.
Ingress Protection	IP54–IP65	IP65 for dusty or wet environments.IEC 60529
Housing Material	HT250	Cast iron for strength and damping; aluminum for weight reduction.GB/T 9439
Weight	10–500 kg	Affects installation and structural support requirements.
Service Factor	1.0–2.0	Higher for shock loads or continuous operation.ISO 6336
Noise Level	≤75 dB(A)	Important for indoor or noise-sensitive applications.ISO 8579-1

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Housing Part
Encloses and protects internal gears, provides mounting points, and contains lubricant

Material: Cast Iron or Aluminum Alloy
Input Shaft Part
Receives power from the motor and transfers it to the primary gear

Material: Alloy Steel
Output Shaft Part
Delivers reduced speed and increased torque to the slewing bearing

Material: Hardened Alloy Steel
Gear Set
Performs the speed reduction and torque multiplication through meshing teeth

Material: Case-Hardened Steel or Carburized Steel
Bearings
Support rotating shafts and reduce friction between moving parts

Material: Bearing Steel with Anti-Friction Coatings
Seals Part
Prevent lubricant leakage and contamination ingress

Material: Synthetic Rubber or PTFE

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Gearbox/Reducer.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Slewing Bearing & Drive

View system integration details

Manufacturers of Gearbox/Reducer

12 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Guangdong SigGear Drive Intelligent Technology Co., Ltd.

Guangdong, CN

Founded 200820,000 m²

ISO 9001

Also makes: Speed Reducer/Gearbox, Planetary Gear Reducer, Motor Controller and 2 more