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R-series helical gear reducer
- Product Description
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┃ R-series helical gear reducer
Covering six sizes of single-stage gear reducers and fourteen sizes of two- and three-stage gear reducers, the R-series helical gear motor‑reducers perfectly meet the requirements for power output and installation space.
┃ Advantage
● High power density
● Long service life
● R37 to R167 can provide low backlash.
● RM series, specially designed for mixing applications.
● The time-tested modular concept and stringent quality standards enable SEW‑EURODRIVE to offer a diverse portfolio of products with finely graded torque and gear ratios. This exceptional versatility has established SEW‑EURODRIVE as a benchmark in the field of drive technology.
┃ We can supply gear reducers in the following specifications:
● Single-stage or multi-stage gear transmission
● Base mounting
● Flange mounting
● Base flange installation
● Flange mounting with an enhanced bearing housing
┃ Original text is empty or contains only invisible characters — preserved as-is. SEW R-Series Helical Gear Reducers
Gear transmission efficiency can reach as high as 98%, with low vibration and minimal noise.
Solid shaft, flange‑mounted or foot‑mounted, and can serve as the input stage of a multi‑stage gearbox.
Output speed: 0.05 rpm – 1829 rpm
Output torque/power: 50 Nm – 18,000 Nm / 0.09 kW – 160 kW
Frame size: R37, R47, R57, R67, R77, R87, R97, R107, R137, R147, R167
RS37,RS47,RS57,RS67,RS77,RS87,RS97,RS107,RS137,RS147,RS167
RF37,RF47,RF57,RF67,RF77,RF87,RF97,RF107,RF137,RF147,RF167
RX37, RX47, RX57, RX67, RX77, RX87, RX97, RX107
RXF37,RXF47,RXF57,RXF67,RXF77,RXF87,RXF97,RXF107
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Their key features include a compact design and quiet operation. The high quality of the materials used, combined with a quality assurance system certified to ISO 9001, ensures exceptional reliability and guarantees seamless integration and adaptability to various media. The housing and cover of the gearbox are manufactured from high‑strength GG20 gray cast iron, featuring robust dimensions and deep ribbing that can withstand substantial pressure and vibration.

For lifting applications, for the food industry, industrial use, bevel gears, for conveyor systems, for the paper industry, for pharmaceutical applications, for machine tools, for pumps, for hoisting equipment, for conveyors, for the cement industry, for mixers, for agitators, and for the steel industry.
Price, Performance, and Reliability—A Universal Gearbox Solution
Today, our industrial gearboxes are highly favored by customers for their exceptional reliability, superior quality, and compelling price‑performance ratio. Our versatile gearbox designs seamlessly integrate with a wide range of standard options, such as motor bell housings, check valves, and ferrous‑metal seals. As a result, our product portfolio offers virtually limitless design possibilities. The compact footprint of our gearboxes, the choice between horizontal and vertical mounting, the availability of multiple mounting configurations—including base‑mounted and shaft‑mounted units—and the straightforward connection of auxiliary components all provide you with maximum flexibility when designing your plant.
Diversity and Flexibility — Application Solutions
With its range of helical gear reducers, Flender now offers the largest portfolio of application-specific solutions to date, enabling it to meet virtually all drive‑technology requirements across hundreds of industrial and raw‑material extraction applications.
An Overview of Your Benefits Reliability and Fail-Safe Operation
Large-scale modular systems provide the optimal gearbox solutions.
High efficiency
Rapid global availability
Comprehensive Parts Program
Five output shaft versions, enabling easy connection to working machinery.
Can be used as a standalone gear set or integrated into a drive system.
Adopted as an industry standard and used worldwide.
Mining and Cement: Conveyor Belts, Bucket Elevators, Crushers
Crane: crane, trolley, container crane
Power generation: cooling towers, water turbines, hydraulic propellers
Plastics and Rubber: Single-Screw Extruder
Pulp and Paper: Paper Machine
Water and Wastewater: Aerator
Food and beverages: mixers, aerators
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