Audible noise is evidence to investigate, but fault location depends on whether the sound tracks speed, torque or the machine structure.
Helical Gearbox Noise Diagnosis by Speed and Load
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EP-R117 Helical Gear Reducer – High Torque Industrial Gearmotor
The EP-R117 inline helical gearmotor delivers approximately 11,000 Nm output torque and a radial load capacity of ~42,000 N for steel mill auxiliary drives, marine winch systems, and large cooling tower fans. IP55. MOQ: 1–5 sample units; mixed orders from ~USD 1,500; lead time 10–25 working days.
EP-R117 Helical Gear Reducer – High Torque Industrial Gearmotor
The EP-R117 inline helical gear reducer is the frame-117 model in Ever Power's industry-proven R-series inline helical gearmotor lineup. Designed for demanding industrial applications that require reliable, high-efficiency speed reduction with multi-orientation mounting flexibility, the EP-R117 delivers maximum output torque of 11,000 Nm and supports permitted radial loads up to 42,000 N N. Motor power compatibility spans from 0.18 kW through high-power configurations, with gear ratios ranging from i = 3.57 to i = 199.81. The EP-R117 is the natural choice for steel mills, marine winches, large-scale industrial processing applications where performance, compactness, and low maintenance cost are all priorities. Browse the complete Ever Power gear reducer range or contact us for a tailored application review.
The EP-R117 delivers 11,000 Nm output torque within an inline coaxial form factor, providing steel-plant and marine-grade torque density without the complex external shaft arrangements of traditional industrial gear boxes.
EP-R117 — standard foot-mount (R) inline helical gear reducer
Available Configurations
R117
Foot-mount, solid output shaft. Standard horizontal installation for conveyor, mixer, and industrial drives.
Foot-mount, solid output shaft. Standard horizontal installation for conveyor, mixer, and industrial drives.
RF117
Flange-mount output variant. The flanged housing mates directly to the driven machine's input face for alignment-free installation.
Flange-mount output variant. The flanged housing mates directly to the driven machine's input face for alignment-free installation.
R117 with Pre-stage
Two or three-stage combinations extending gear ratio coverage while maintaining the EP-R117 output shaft dimensions. Contact Ever Power for specific pre-stage options.
Two or three-stage combinations extending gear ratio coverage while maintaining the EP-R117 output shaft dimensions. Contact Ever Power for specific pre-stage options.
Technical Specifications
| Parameter | Value / Range |
|---|---|
| Frame Size | 117 |
| Motor Power Range | 0.18 kW – 160 kW (config.) |
| Gear Ratio (i) | 3.57 – 199.81 |
| Max Output Torque | 11,000 Nm |
| Gear Unit Weight (foot/flange) | ~250 kg / ~270 kg |
| Max Permitted Radial Load | 42,000 N N |
| Mounting Positions | M1 – M6 |
| Lubrication | Synthetic gear oil, sealed for life |
| Protection Class | IP55 standard |
| Transmission Efficiency | > 96% per stage |
| Housing Material | Cast iron / die-cast aluminium |
Selection Parameter Table – EP-R117
| Output Speed / Input Speed [rpm] | Output Torque [Nm] | Gear Ratio i | Radial Load [N] | Service Factor fB | Model |
|---|---|---|---|---|---|
| 5252 | 14 | 0.27 | 26885 | 0.85 | R117 |
| 4614 | 16 | 0.31 | 29545 | 1.00 | R117 |
| 4205 | 18 | 0.34 | 30620 | 1.10 | R117 |
| 3996 | 18 | 0.36 | 30810 | 1.15 | R117 |
| 3505 | 20 | 0.41 | 32585 | 1.35 | R117 |
| 3142 | 23 | 0.46 | 33440 | 1.55 | R117R97 |
Mounting Positions M1–M6
Available mounting positions M1–M6 for the R-series (foot-mount models)
M1: Output shaft horizontal right — standard for conveyor and pump drives.
M2: Output shaft horizontal left — mirror-image installation.
M3: Shaft downward — agitators, thickener rakes, screw conveyors.
M4: Shaft upward — overhead drives, fan towers, elevated conveyors.
M5: Horizontal motor, angled shaft down — compact side-entry layouts.
M6: Horizontal motor, angled shaft up — inclined conveyor and upward feed drives.
Model Number Explanation
Model number designation — Ever Power R-series inline helical gearmotor
| Code Element | Meaning | Example |
|---|---|---|
| R | Inline helical gear series | R |
| F (optional) | Flange output; absent = foot mount | RF117 |
| 117 | Frame size designation | R117 |
| Pre-stage suffix | Additional gear stage for extended ratio | R117R77 |
Industry Applications
Heavy Conveyor Systems
Belt conveyors, apron conveyors, and bucket elevators in mining, quarrying, and bulk material handling facilities specify the EP-R117 for its high radial load capacity and reliable sealed lubrication.
Belt conveyors, apron conveyors, and bucket elevators in mining, quarrying, and bulk material handling facilities specify the EP-R117 for its high radial load capacity and reliable sealed lubrication.
Industrial Mixing & Processing
Reactor agitators, thickener rake drives, and large mixer drives benefit from the EP-R117's high starting torque and consistent speed characteristics under variable-viscosity loads.
Reactor agitators, thickener rake drives, and large mixer drives benefit from the EP-R117's high starting torque and consistent speed characteristics under variable-viscosity loads.
Steel Mills, Marine Winches, Large-Scale Industrial Processing
Applications in steel mills, marine winches, large-scale industrial processing environments rely on the EP-R117 for its combination of output torque, sealed maintenance-free operation, and multi-orientation mounting flexibility.
Applications in steel mills, marine winches, large-scale industrial processing environments rely on the EP-R117 for its combination of output torque, sealed maintenance-free operation, and multi-orientation mounting flexibility.
Customer Case Studies
Japan · Steel Industry
★★★★★
A Japanese integrated steel mill fitted EP-R117 gearmotors on their continuous casting dummy-bar pulling drives. The extremely high torque requirement under cold-start conditions was met by the R117's high-ratio configurations. "We replaced hydraulic motor drives on two strands with EP-R117 electric gearmotors. Startup reliability improved significantly—we eliminated three to four false-start hydraulic faults per week that were costing us casting time."
Norway · Marine Winch Systems
★★★★★
A Norwegian maritime equipment manufacturer selected EP-R117 drives for their offshore anchor-handling winch auxiliary drives. Compact packaging within the winch drum assembly was essential. "The inline coaxial layout of the R117 saved 280 mm of axial length compared to a parallel-shaft solution, allowing us to meet the deck penetration dimensions specified by the vessel owner. Reliability over 14 months of offshore operation has been exceptional."
China · Power Generation
★★★★☆
A Chinese power plant cooling tower operator installed EP-R117 drives on their large-diameter cooling fan gear assemblies. The drives run continuously at variable speed via VFD control. "VFD speed range from 15 to 50 Hz covers our full operational envelope. The EP-R117 maintains stable, quiet operation across the entire speed range. Energy savings from variable-speed operation versus our old fixed-speed drives reduced cooling tower power consumption by 22%."
Frequently Asked Questions
Why Specify the EP-R117 from Ever Power?
Ever Power delivers the EP-R117 inline helical gear reducer with full application engineering support, including selection assistance, 3D CAD data, dimensional drawings, and post-delivery commissioning guidance. Our technical team has experience across the industries described above and can advise on motor pairing, mounting configuration, and service factor selection for your specific application. Visit the Ever Power company page to learn more about our engineering approach, or go straight to the contact page to reach our technical sales team.
Request EP-R117 Pricing, Datasheets & Application Support
Tell us your speed, torque, mounting, and environment requirements. Sample orders and mixed-model inquiries welcome.
Blogs Updated
Coupling Alignment for Inline Helical Gearbox Installations
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Helical Gearbox Oil Leak Diagnosis and Seal Protection
Oil observed on a housing may have traveled from a vent, joint or shaft seal; finding the first wet point is essential.