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-R97 Helical Gear Reducer – Compact High-Efficiency Gearmotor
The EP-R97 inline helical gearmotor delivers up to 4,600 Nm output torque and a permitted radial load of 26,980 N—ideal for large thickeners, reactor agitators, and mineral processing drives. IP55 sealed. MOQ: 1–5 sample units; mixed orders from ~USD 1,500; lead time 10–25 working days.
EP-R97 Helical Gear Reducer – Compact High-Efficiency Gearmotor
The EP-R97 inline helical gear reducer is the frame-97 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-R97 delivers maximum output torque of 4600 Nm and supports permitted radial loads up to 26,980 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-R97 is the natural choice for cement, chemical, heavy processing, mining 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-R97 combines a very high output torque of 4,600 Nm with a compact inline coaxial form factor, making it the preferred choice when bevel-helical or shaft-mounted drives are too costly or too complex for the available installation space.
EP-R97 — standard foot-mount (R) inline helical gear reducer
Available Configurations
R97
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.
RF97
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.
R97 with Pre-stage
Two or three-stage combinations extending gear ratio coverage while maintaining the EP-R97 output shaft dimensions. Contact Ever Power for specific pre-stage options.
Two or three-stage combinations extending gear ratio coverage while maintaining the EP-R97 output shaft dimensions. Contact Ever Power for specific pre-stage options.
Technical Specifications
| Parameter | Value / Range |
|---|---|
| Frame Size | 97 |
| Motor Power Range | 0.18 kW – 160 kW (config.) |
| Gear Ratio (i) | 3.57 – 199.81 |
| Max Output Torque | 4600 Nm |
| Gear Unit Weight (foot/flange) | 125–135 kg / 148 kg |
| Max Permitted Radial Load | 26,980 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-R97
| Output Speed / Input Speed [rpm] | Output Torque [Nm] | Gear Ratio i | Radial Load [N] | Service Factor fB | Model |
|---|---|---|---|---|---|
| 3160 | 8 | 0.46 | 20425 | 1.00 | R97 |
| 2659 | 10 | 0.55 | 23275 | 1.20 | R97 |
| 2387 | 11 | 0.61 | 24415 | 1.35 | R97 |
| 1922 | 13 | 0.75 | 25840 | 1.65 | R97 |
| 1429 | 17 | 1.01 | 26505 | 2.20 | R97 |
| 1040 | 21 | 1.39 | 26885 | 3.05 | R97R57 |
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 | RF97 |
| 97 | Frame size designation | R97 |
| Pre-stage suffix | Additional gear stage for extended ratio | R97R77 |
Industry Applications
Heavy Conveyor Systems
Belt conveyors, apron conveyors, and bucket elevators in mining, quarrying, and bulk material handling facilities specify the EP-R97 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-R97 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-R97'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-R97's high starting torque and consistent speed characteristics under variable-viscosity loads.
Cement, Chemical, Heavy Processing, Mining
Applications in cement, chemical, heavy processing, mining environments rely on the EP-R97 for its combination of output torque, sealed maintenance-free operation, and multi-orientation mounting flexibility.
Applications in cement, chemical, heavy processing, mining environments rely on the EP-R97 for its combination of output torque, sealed maintenance-free operation, and multi-orientation mounting flexibility.
Customer Case Studies
China · Cement Industry
★★★★★
A cement plant in Shandong Province standardised on EP-R97 gearmotors for their cement mill feed conveyors after competitive testing against bevel-helical alternatives. "The EP-R97's inline layout reduced our installation depth by 320 mm compared to the bevel-helical we had specified, which resolved a structural interference issue we had been trying to engineer around for months. The units have operated reliably for 26 months without interruption."
Kazakhstan · Mining & Mineral Processing
★★★★★
A copper concentrator plant in Kazakhstan uses EP-R97 drives on their thickener rake arms. The M3 (shaft-down) mounting is required for this application. "The sealed lubrication in the EP-R97 means our maintenance team does not access the gearbox internals at all during normal operation. With remote-location staffing constraints, a maintenance-free drive is a genuine operational advantage."
Belgium · Chemical Processing
★★★★☆
A Belgian specialty chemical manufacturer installed EP-R97 units on the reactor agitator drives of three new reactor vessels. Precise speed with high starting torque was the design requirement. "We specified the R97 because of its ability to start under full reaction-mix viscosity. The high starting torque margin and smooth helical gear operation gave us process consistency we could not achieve with our previous worm-drive units."
Frequently Asked Questions
Why Specify the EP-R97 from Ever Power?
Ever Power delivers the EP-R97 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-R97 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.