R/K/F/S series helical gear reducers are high-performance, hard-tooth-surface gearboxes designed for industrial applications requiring compact structure, high torque output, and long-term operational stability.
Featuring carburized and quenched alloy-steel gears that undergo precision grinding, these reducers deliver exceptional durability, high transmission efficiency, and low noise even in heavy-duty working environments.

The series offers multiple structural forms—including inline (R series), right-angle bevel-helical (K series), shaft-mounted (F series), and parallel-shaft helical (S series)—providing wide installation flexibility and compatibility with various motor types.
The gearbox can be supplied as an integrated motor-reducer assembly using high-quality copper-coil motors for excellent reliability and consistent power delivery.

Engineered for modern industry, the R/K/F/S series is widely adopted across metallurgy, mining, port machinery, petrochemical equipment, wind power systems, hoisting and logistics machinery, packaging lines, environmental equipment, and general factory automation.

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Features

Superior Performance

• Hard-tooth-surface gears with carburizing and quenching treatment for long service life.
• High load-carrying capacity with minimized vibration during heavy-load operation.
• Precision gear grinding and hobbing ensure smooth operation and high efficiency.

High Efficiency & Low Noise

• Helical gear design provides high transmission efficiency and excellent mechanical stability.
• Significantly reduced noise compared with worm and spur gear reducers.

Integrated Motor Gearbox Design

• Fully compatible with standardized IEC copper-coil motors.
• New-generation rotor technology ensures high reliability and energy efficiency.

Compact Structure & Space Saving

• Modular design with multiple mounting options.
• Smaller footprint compared with traditional gearbox systems.

Wide Application Versatility

• Suitable for continuous operation under demanding industrial environments.
• Flexible installation: foot-mounted, flange-mounted, or shaft-mounted.

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Specifications & Parameters

R Series Helical Gear Reducers

Model	Input Power (kW)	Ratio Range	Max Torque (Nm)
R17	0.12–0.75	3.83–81.64	87
R27	0.12–3	3.37–135	128
R37	0.12–3	3.83–134.8	196
R47	0.12–5.5	3.83–177	305
R57	0.12–7.5	4.39–187	440
R67	0.12–7.5	4.29–199.8	595
R77	0.18–11	5.31–195.2	705
R87	0.55–22	5.3–246.54	1310
R97	0.55–30	4.5–289.74	2110
R107	2.2–45	5.004–251.17	4380
R137	5.5–55	5.14–223.6	7910
R147	11–90	5–163.31	12700
R167	11–160	5–229.71	17700

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RX Series Helical Gear Reducers (High-Speed Input)

Model	Input Power (kW)	Ratio Range	Max Torque (Nm)
RX37	0.12–1.1	1.62–4.43	20
RX57	0.12–5.5	1.3–5.5	71
RX67	0.12–7.5	1.4–6.07	120
RX77	1.1–11	1.42–6.53	215
RX87	3–22	1.39–6.45	395
RX97	5.5–30	1.42–5.79	600
RX107	5.5–45	1.44–6.63	810

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Application Scenarios

Port Machinery

• Conveyor drives
• Container handling equipment
• Winches and hoists

Petrochemical Equipment

• Pumps, mixers, agitators
• Drilling equipment

Tower Cranes & Construction Machinery

• Slewing drives
• Hoisting mechanisms

Factory Automation & Machinery

• Packaging lines
• Assembly conveyors
• Printing and textile machines

Wind Power Systems

• Yaw drives
• Pitch control mechanisms

Hoisting & Logistics Equipment

• Automated warehouse conveyors
• Lifting platforms
• Material handling machines