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-R147 Helical Gearmotor – Large Frame Inline Speed Reducer
The EP-R147 helical gear reducer achieves up to 45,000 Nm output torque and radial loads to 70,200 N. Available with R77 pre-stage for ratios up to i=21,221—suited for kiln auxiliary drives, ball mill positioning, and port scraper slewing. IP55. MOQ: 1–5 sample units; mixed orders from ~USD 1,500; lead time 15–30 working days.
EP-R147 Helical Gearmotor – Large Frame Inline Speed Reducer
The EP-R147 inline helical gear reducer is the frame-147 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-R147 delivers maximum output torque of 45,000 Nm and supports permitted radial loads up to 70,200 N N. Motor power compatibility spans from 0.12 kW through high-power configurations, with gear ratios ranging from i = 3.57 to i = 21,221. The EP-R147 is the natural choice for kilns, ball mills, heavy elevator systems, large drums 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-R147 achieves extreme torque output up to 45,000 Nm and radial loads up to 70,200 N, entering the territory of purpose-built heavy process drives while retaining the catalogue availability and standard IEC motor interface of the R-series platform.
EP-R147 — standard foot-mount (R) inline helical gear reducer
Available Configurations
R147
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.
RF147
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.
R147 with Pre-stage
Two or three-stage combinations extending gear ratio coverage while maintaining the EP-R147 output shaft dimensions. Contact Ever Power for specific pre-stage options.
Two or three-stage combinations extending gear ratio coverage while maintaining the EP-R147 output shaft dimensions. Contact Ever Power for specific pre-stage options.
Technical Specifications
| Parameter | Value / Range |
|---|---|
| Frame Size | 147 |
| Motor Power Range | 0.12 kW – 160 kW (config.) |
| Gear Ratio (i) | 3.57 – 21,221 |
| Max Output Torque | 45,000 Nm |
| Gear Unit Weight (foot/flange) | 295–428 kg / 315–438 kg |
| Max Permitted Radial Load | 70,200 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-R147
| Output Speed / Input Speed [rpm] | Output Torque [Nm] | Gear Ratio i | Radial Load [N] | Service Factor fB | Model |
|---|---|---|---|---|---|
| 0.07 | 18107 | 21221 | 61275 | 0.95 | R147R77 |
| 0.08 | 15833 | 18637 | 63935 | 1.10 | R147R77 |
| 0.09 | 13837 | 16209 | 65170 | 1.25 | R147R77 |
| 0.12 | 11278 | 12278 | 66725 | 1.60 | R147 |
| 0.16 | 8395 | 9841 | 69350 | 2.10 | R147 |
| 0.20 | 6439 | 7538 | 70015 | 2.70 | R147 |
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 | RF147 |
| 147 | Frame size designation | R147 |
| Pre-stage suffix | Additional gear stage for extended ratio | R147R77 |
Industry Applications
Heavy Conveyor Systems
Belt conveyors, apron conveyors, and bucket elevators in mining, quarrying, and bulk material handling facilities specify the EP-R147 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-R147 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-R147'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-R147's high starting torque and consistent speed characteristics under variable-viscosity loads.
Kilns, Ball Mills, Heavy Elevator Systems, Large Drums
Applications in kilns, ball mills, heavy elevator systems, large drums environments rely on the EP-R147 for its combination of output torque, sealed maintenance-free operation, and multi-orientation mounting flexibility.
Applications in kilns, ball mills, heavy elevator systems, large drums environments rely on the EP-R147 for its combination of output torque, sealed maintenance-free operation, and multi-orientation mounting flexibility.
Customer Case Studies
Germany · Cement Industry
★★★★★
A German cement group standardised on EP-R147 gearmotors for their rotary kiln auxiliary drives. The requirement was for extreme torque delivery during kiln creep operation for maintenance. "We need the kiln to turn at 0.07 rpm during lining inspection, which requires extreme gear reduction. The EP-R147's R77 pre-stage combination delivers this ratio without a custom drive solution. The reliability of the inline helical design has given us confidence in the auxiliary drive that our previous hydraulic creep drive never provided."
Brazil · Mining – Ball Mills
★★★★★
A Brazilian iron ore producer uses EP-R147 drives on the auxiliary positioning drives for their ball mill shells during maintenance. High torque under zero-speed conditions with minimal creep was specified. "The R147 provides the extremely high torque needed to move a loaded ball mill for relining. The sealed helical design also means we do not need to rig special lubrication systems during the short maintenance drive cycles. This represents a major simplification of our reline procedure."
South Korea · Port Material Handling
★★★★☆
A South Korean port operator installed EP-R147 units on the slewing drives of their bulk material storage bridge scrapers. "The requirement was for high torque, very slow slewing speed, and reliable operation in coastal salt-air environment. The sealed EP-R147 met all three without modification. Operational uptime for these drives has been 99.7% over the first 18 months."
Frequently Asked Questions
Why Specify the EP-R147 from Ever Power?
Ever Power delivers the EP-R147 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-R147 Pricing, Datasheets & Application Support
Tell us your speed, torque, mounting, and environment requirements. Sample orders and mixed-model inquiries welcome.
Blogs Updated
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Helical Gearbox Oil Leak Diagnosis and Seal Protection
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