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
Foot-mount, solid output shaft. Standard horizontal installation for conveyor, mixer, and industrial drives.
Flange-mount output variant. The flanged housing mates directly to the driven machine’s input face for alignment-free installation.
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)
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
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.
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.
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
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.”
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.”
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
What is the maximum output torque of the EP-R147?
What is the maximum gear ratio available for the EP-R147?
What is the permitted radial load on the EP-R147?
What are the MOQ and lead time for EP-R147?
Can the EP-R147 operate in a corrosive coastal environment?
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.
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