R Series Helical Gear Motors

R‑series helical gear reducer is hardened‑helical‑gear speed‑reduction equipment, widely‑used general‑purpose industrial transmission gearbox for diverse speed‑reduction applications across multiple industries.

This R‑series gearbox supports direct‑motor‑input connection and provides versatile mounting configurations, including foot‑mount and flange‑mount options. Thanks to its compact offset‑output structure and integrated one‑piece cast housing, this industrial reducer achieves small installation footprint, high mechanical rigidity, and longer‑lasting bearing service life for heavy‑duty operating conditions.

The R Series inline helical gearbox is a high-efficiency industrial gear reducer designed for conveyor systems, material handling equipment, packaging machines, mixers, and general industrial drives.

With modular design, hardened helical gears, and multiple mounting configurations, the R Series provides high torque density, smooth operation, and long service life for demanding industrial applications.

It can be supplied as a complete geared motor solution with IEC or NEMA motors, brake motors, inverter motors, and explosion-proof motors.

Main Components

Housing

High-strength cast iron housing provides excellent rigidity, vibration resistance, and stable operation under heavy loads.

Gears

Precision machined helical gears with optimized tooth profile ensure smooth meshing, high transmission efficiency, reduced noise, and extended service life.

Bearings

Premium bearings are selected according to load conditions to improve reliability and continuous operation capability.

Shaft Design

High-strength alloy steel shafts provide excellent torque transmission capability and resistance against shock loads.

Input Configurations

Complete geared motor solution with electric motor
Solid shaft input
IEC motor adapter
NEMA motor interface
Custom motor mounting solutions available

IEC or NEMA Motor Flange
4. Applicable Motors:

The R Series gearbox can be combined with:

Three-phase asynchronous motors
Single-phase motors
Brake motors
Variable frequency drive motors
Explosion-proof motors
Multi-speed motors
Roller motors
Customized motors

Brake Motors
Inverter Motors
Multi-speed Motors
Explosion-proof Motor
Roller Motor
5. Output Configurations:
Solid Shaft Output

Models:

R Series (Foot-mounted): R18~R168
RS Series (Foot-mounted, Solid Shaft Input)
RF Series (Flange-mounted): RF18~RF168
RFS Series (Flange-mounted, Solid Shaft Input)
RX Series (1 Stage, Foot-mounted): RX38~RX158
RXS Series (1 Stage, Foot-mounted, Solid Shaft Input)
RXF Series (1 Stage, Flange-mounted): RXF38~RXF158
RXFS Series (1 Stage, Flange-mounted, Solid Shaft Input)
RM Series (agitator gearboxes): Specially designed for agitating applications

Key Features

1. High Efficiency Transmission

Helical gear design ensures efficient power transmission and reduced energy consumption.

2. Compact Modular Design

Multiple housing sizes and mounting options simplify installation and maintenance.

3. High Torque Density

Optimized gear geometry provides high torque output within a compact footprint.

4. Low Noise Operation

Precision gears provide smooth engagement and quiet running performance.

5. Long Service Life

Robust housing design and high-quality components ensure reliable operation in industrial environments.

6. Flexible Combination

Can be combined with R, K, F, S series gearboxes and UDL variable speed drives for complete solutions.

Parameters:

2 Stage or 3 Stage

Models	Output Shaft Dia.	Input Shaft Dia.	Power(kW)	Ratio	Max. Torque(Nm)
R/RF18	20mm	–	0.18~0.75	3.83~74.84	85
R/RF28	25mm	16mm	0.18~3	3.37~135.09	130
R/RF38	25mm	16mm	0.18~3	3.41~134.82	200
R/RF48	30mm	19mm	0.18~5.5	3.83~176.88	300
R/RF58	35mm	19mm	0.18~7.5	4.39~186.89	450
R/RF68	35mm	19mm	0.18~7.5	4.29~199.81	600
R/RF78	40mm	24mm	0.18~11	5.21~195.24	820
R/RF88	50mm	28mm	0.55~22	5.36~246.54	1550
R/RF98	60mm	38mm	0.55~30	4.49~289.6	3000
R/RF108	70mm	42mm	2.2~45	5.06~245.5	4300
R/RF138	90mm	55mm	5.5~55	5.51~223.34	8000
R/RF148	110mm	55mm	11~90	5.00~163.46	13000
R/RF168	120mm	70mm	11~160	8.77~196.41	18000

1 Stage

Models	Output Shaft Dia.	Input Shaft Dia.	Power(kW)	Ratio	Max. Torque(Nm)
RX/RXF38	20mm	16mm	0.18~1.1	1.6~3.76	20
RX/RXF58	20mm	19mm	0.18~5.5	1.3~5.5	70
RX/RXF68	25mm	19mm	0.18~7.5	1.4~6.07	135
RX/RXF78	30mm	24mm	1.1~11	1.42~5.63	215
RX/RXF88	40mm	28mm	3~22	1.39~6.44	400
RX/RXF98	50mm	38mm	5.5~30	1.42~5.82	600
RX/RXF108	60mm	42mm	7.5~45	1.44~6.65	830
RX/RXF128	75mm	55mm	7.5~90	1.56~6.47	1110
RX/RXF158	90mm	70mm	11~132	1.63~6.22	1680

Installation:

Foot Mounted
Flange Mounted

Lubrication:

Oil-bath and Splash Lubrication

Cooling:

Natural Cooling

Applications

Conveyor Systems

Belt conveyors
Roller conveyors
Chain conveyors
Material handling equipment

Industrial Machinery

Packaging machines
Textile machines
Food processing equipment
Mixing systems

Heavy Duty Applications

Mining equipment
Steel industry
Cement plants
Bulk material handling

Special Applications

Agitators
Mixers
Extrusion auxiliary equipme

R Series Helical Gear Reducer FAQ

Q1: What motors are compatible with the R series helical gear reducer? A1: The R series gearbox supports single-phase AC motors, three-phase AC motors, brake motors, inverter motors, multi-speed motors, roller motors and explosion-proof motors. It is compatible with both IEC and NEMA motor flanges for diverse installation needs.

Q2: What mounting options does the R series gear reducer have? A2: It provides two mainstream mounting types: foot-mounted and flange-mounted. Solid shaft input models including RS, RFS, RXS and RXFS series are available for special mechanical configuration requirements.

Q3: How many reduction stages are available for R series reducers? A3: The R series includes single-stage, two-stage and three-stage reduction designs. RX and RXF series are single-stage gear reducers, while R and RF series adopt two-stage and three-stage reduction structures for wider speed ratio ranges.

Q4: Can the R series helical gearbox be combined with other gearbox series? A4: Yes. The modular R series reducer can be flexibly combined with K series, F series, S series and UDL series gearboxes to achieve larger reduction ratios and meet heavy-duty working conditions.

Q5: What are the lubrication and cooling methods of the R series reducer? A5: The standard lubrication method is oil-bath and splash lubrication. The gearbox adopts natural cooling as the standard cooling solution, which is stable and low-maintenance for long-term operatio

Q6: What industries and applications are R series reducers suitable for? A6: R series helical gear reducers are widely used in agitators, mixers, conveyor systems, packaging machinery, mining equipment, cement industry equipment and various general industrial speed reduction transmission scenarios.

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