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-R47 Helical Gear Reducer – Foot Mount & Flange Mount
The EP-R47 inline helical gear reducer offers up to 550 Nm output torque and a permitted radial load of 5,824 N, ideal for belt/chain drives in pump, compressor, and material handling applications. IP55 sealed. MOQ: 1–5 sample units; mixed orders from ~USD 1,500; lead time 10–25 working days.
EP-R47 Helical Gear Reducer – Foot Mount & Flange Mount
The EP-R47 inline helical gear reducer is the frame-47 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-R47 delivers maximum output torque of 550 Nm and supports permitted radial loads up to 5,824 N N. Motor power compatibility spans from 0.12 kW through high-power configurations, with gear ratios ranging from i = 3.57 to i = 139.99. The EP-R47 is the natural choice for pump drives, compressors, material handling 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.
High permitted radial load up to 5,824 N makes the EP-R47 ideal for belt-pulley, chain-sprocket, and pinion drives without additional bearing support.
EP-R47 — standard foot-mount (R) inline helical gear reducer
Available Configurations
R47
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.
RF47
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.
R47 with Pre-stage
Two or three-stage combinations extending gear ratio coverage while maintaining the EP-R47 output shaft dimensions. Contact Ever Power for specific pre-stage options.
Two or three-stage combinations extending gear ratio coverage while maintaining the EP-R47 output shaft dimensions. Contact Ever Power for specific pre-stage options.
Technical Specifications
| Parameter | Value / Range |
|---|---|
| Frame Size | 47 |
| Motor Power Range | 0.12 kW – 160 kW (config.) |
| Gear Ratio (i) | 3.57 – 139.99 |
| Max Output Torque | 550 Nm |
| Gear Unit Weight (foot/flange) | 18 kg / 18 kg |
| Max Permitted Radial Load | 5,824 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-R47
| Output Speed / Input Speed [rpm] | Output Torque [Nm] | Gear Ratio i | Radial Load [N] | Service Factor fB | Model |
|---|---|---|---|---|---|
| 231 | 195 | 6.25 | 5007 | 1.15 | R47 |
| 179 | 252 | 8.10 | 5359 | 1.50 | R47 |
| 156 | 289 | 9.28 | 5425 | 1.70 | RF47 |
| 147 | 307 | 9.86 | 5473 | 1.80 | RF47 |
| 117 | 386 | 12.41 | 5757 | 2.50 | R47R17 |
| 106 | 427 | 13.67 | 5776 | 2.70 | R47R17 |
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 | RF47 |
| 47 | Frame size designation | R47 |
| Pre-stage suffix | Additional gear stage for extended ratio | R47R77 |
Industry Applications
Heavy Conveyor Systems
Belt conveyors, apron conveyors, and bucket elevators in mining, quarrying, and bulk material handling facilities specify the EP-R47 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-R47 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-R47'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-R47's high starting torque and consistent speed characteristics under variable-viscosity loads.
Pump Drives, Compressors, Material Handling
Applications in pump drives, compressors, material handling environments rely on the EP-R47 for its combination of output torque, sealed maintenance-free operation, and multi-orientation mounting flexibility.
Applications in pump drives, compressors, material handling environments rely on the EP-R47 for its combination of output torque, sealed maintenance-free operation, and multi-orientation mounting flexibility.
Customer Case Studies
Malaysia · Chemical Processing
★★★★★
A specialty chemical plant in Johor selected EP-R47 gearmotors for their paddle mixer drives. The units operate 24/7 in humid, corrosive vapour conditions. "IP55 sealing proved itself over 26 months of continuous operation. We had zero gearbox-related unplanned stops, which is remarkable given our harsh process environment."
Canada · Mining Conveyor
★★★★★
A Canadian open-pit mine deployed EP-R47 units on their ore-sorting conveyor infeed drives. The high radial load capacity eliminated the need for outboard bearings on sprocket drives. "We saved roughly $4,200 per drive train in bearing housings and installation labour. The EP-R47 handles the sprocket load without any vibration that would have troubled a smaller unit."
South Africa · Water Treatment
★★★★☆
A municipal water treatment plant in Gauteng replaced ageing worm gearboxes on slow-speed paddle flocculators with EP-R47 units. Energy consumption dropped measurably. "Our energy auditor confirmed a 14% reduction in drive-train power consumption on those flocculators. The payback period on the investment was under eight months."
Frequently Asked Questions
Why Specify the EP-R47 from Ever Power?
Ever Power delivers the EP-R47 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-R47 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
Flexible couplings accommodate limited relative movement, but poor shaft alignment still affects bearings and seals.
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.