Why Conveyor Gearbox Selection Matters
The selection of the appropriate industrial gearbox for a conveyor system determines material flow, energy consumption, and the longevity of the complete system. An industrial gearbox does more on a conveyor than simply slow down motor speed; it converts rotation into stable torque that drives continuous loads. Even small mismatches in torque or ratio may set off overheating, vibration, or premature bearing wear in operations concerning large dimensions, such as mining, ports, and cement plants.
Key Working Conditions in Conveyor Applications
It is important to understand the actual working environment before selecting a gearbox. Conveyor systems—depending on load type and duty cycle (belt conveyors, screw conveyors, bucket conveyors, etc.)—will each stress components differently.
- Belt conveyors demand consistent low-speed torque to prevent belt slippage.
- Screw conveyors need a high starting torque to overcome the friction from accumulated material.
- Bucket conveyors face irregular shock loads and require strong radial bearings.
Ambient conditions must also be considered. Temperatures often range from –10 °C to 40 °C, with high humidity or dust accelerating gear wear. Guomao gearboxes are sealed to IP54–IP55 and can be equipped with forced lubrication to stabilize oil temperature. For long-duty operation, a service factor (S.F.) of 1.4–1.6 is recommended to handle overload peaks and speed fluctuations safely.
Essential Parameters for Gearbox Selection
Torque and Speed Ratio Matching
The torque requirement of a conveyor can be estimated using the relationship:
T=9550×P/n2
Where P is the motor power in kW and n₂ is the output speed in rpm.
As an example, if a 22 kW motor at 80 rpm is driving a conveyor drum, it needs about 2,625 Nm of torque. Choosing the right gearbox with sufficient torque margin avoids overcurrent at startup and extends bearing life. Guomao’s helical reducers are offered in ratios ranging from 1.26 to 33,000, which enables precise belt or screw speed regulation without loss of efficiency.
Mounting Orientation and Space Constraints
In many cases, conveyors operate in confined structures. Guomao gearboxes support several installation methods: foot-mounted, flange-mounted, or shaft-mounted; they can be arranged horizontally or vertically. Right-angle helical-bevel types are ideal for compact transfer stations, while parallel-shaft units simplify long conveyor alignment. The flexibility in mounting reduces thermal stress and eases maintenance access to the conveyor parts.
Thermal Efficiency and Noise Control
For continuous operation, high efficiency and reliable cooling are required. The carburized and ground gears in Guomao achieve up to 98.5% mechanical, efficiency verified by factory load tests. Precision grinding-DIN 6 gear class-reduces vibration and keeps operation noise under 85 dB. Bearings rated for over 25,000 hours of service maintain performance in 24-hour environments.
| Parameter | Typical Guomao Value | Engineering Significance |
| Efficiency (helical stages) | Up to 98.5 % | Lower heat and energy loss |
| Bearing life | > 25,000 hours | Fewer maintenance stops |
| Noise level | ≤ 85 dB | Improved operator comfort |
| Gear accuracy | DIN 6 | Consistent torque transmission |
How to Match the Right Gearbox with Conveyor Requirements
Step 1 — Define Input Power and Load
Begin with motor power and conveyor drum diameter to calculate the required torque. Always consider dynamic peaks during startup or material accumulation. Guomao engineers recommend selecting a gearbox rated 20–30 % above the calculated torque to achieve longer life under continuous duty.
Step 2 — Select the Proper Ratio and Model
The correct ratio aligns conveying speed with mechanical efficiency. Two-stage or three-stage helical reducers are common for belt conveyors, providing a compact size with high torque. For inclined or heavy-load conveyors, models with extended bearings and robust shafts offer better durability.
Step 3 — Confirm Installation and Maintenance Requirements
Ensure stable foundations and shaft alignment (≤ 0.05 mm deviation). Guomao reducers use CKD 220 or CKD 320 heavy-duty industrial gear oil. For high ambient temperatures, forced lubrication or oil circulation is recommended. Lubricant should be replaced after the first 500 hours and every 3,000–4,000 hours thereafter, depending on operating conditions.
Guomao — Trusted Drive Solutions for Conveyor Systems
Overview of Guomao’s Capabilities
Guomao stands as one of China’s top makers of work transfer gear. We have more than 30 years of study and build. Our site covers 530,000 m². Yearly output value goes over USD 400 million. All gearboxes meet GB/T 3480, DIN 3990, and ISO 6336 rules. Each model gets load, heat rise, and shake tests before send. This makes sure trust in heavy conveyor jobs.
Gearbox Series Optimized for Conveyor Applications
G Series Helical Gear Reducers
Guomao’s G Series Gear Reducer is the core drive for most industrial conveyors. Each unit combines carburized helical gears with a modular housing for multiple installation modes.
- Power range: 0.12 – 200 kW
- Ratio: 1.26 – 33,000
- Maximum output torque: 50 kN·m
- Efficiency: ≥ 95 %
These reducers operate in belt, screw, and bucket conveyors and hoisting systems. High-strength cast-iron housings, precise tooth geometry, and low-noise design ensure stable transmission even in dusty, high-vibration environments.
H-Parallel Industrial Gearbox
The H-Parallel Industrial Gearbox is designed for heavy material-handling systems and long-distance belt conveyors. The parallel-shaft helical gears transmit torque up to 950 kN·m. The housings fulfill all DIN 3991 and ISO 10300 specifications relevant to bevel gears. The gearbox can be mounted in either a horizontal or vertical orientation, provides improved bearing arrangements for continued operation with shock loads, and offers 98% gear efficiency and noise levels below the limits specified in the industry under full load.
Cycloidal Gear Reducers
For automated or precision conveyors, Guomao’s Cycloidal Gear Reducers offer compact size, low backlash, and excellent shock resistance. Their planetary motion and multi-gear engagement achieve smooth output speed control.
- Power range: 0.12 – 90 kW
- Ratio: 7 – 650,000
- Maximum output torque: 30 kN·m
These units are widely used in automated sorting and logistics conveyors where precision and low noise are essential.
Why Choose Guomao for Conveyor Projects
Guomao gearboxes combine high efficiency, precision, and durability. All gears are made from 20CrMnTi carburized steel and ground to micron tolerance. Key advantages include:
- High mechanical efficiency (> 95 %), reducing energy consumption.
- Low noise and vibration, ensuring stable operation.
- Modular configuration for custom conveyor layouts.
- Extended service life, with critical components rated for > 25,000 hours.
Guomao also offers engineering support for design calculation, selection, and installation. This technical partnership approach helps conveyor operators achieve lower lifecycle costs and greater system stability.
FAQ
Q: What gearbox type is most suitable for heavy-duty conveyor systems?
A: Heavy-duty conveyors gain from Guomao H-Parallel Industrial Gearboxes. They give a force of up to 950 kN·m. Their hard houses and hard gears keep steady under long loads.
Q: How often should conveyor gearboxes be maintained?
A: For a steady run, check the oil weekly. Change lubricant every 3,000–4,000 hours. Guomao gearboxes have easy oil ports and seals for fast care.
Q: What is the difference between helical and cycloidal gearboxes in conveyors?
A: Helical gearboxes (G Series) take a higher force for big belt systems. Cycloidal gearboxes give a small, low-play fix for auto conveyors. Both keep a work rate over 95 %.
Q: Can Guomao gearboxes replace imported models in existing conveyors?
A: Yes. Guomao gearboxes follow ISO and DIN rules. They fit the size with many important models. This allows drop-in replacement without changing the mounts.
Q: Which companies are recognized for reliable conveyor gearboxes?
A: Guomao counts as one of China’s top work transfer makers. We give tested and marked reducers used widely in mining, metal, ports, and goods jobs.
