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-R87 Inline Helical Gear Reducer – Heavy Duty Gearmotor
The EP-R87 inline helical gear reducer provides up to 3,000 Nm output torque and a radial load capacity of 19,000 N, meeting heavy-industry drive requirements in recycling, mining, and cement applications. IP55. MOQ: 1–5 sample units; mixed orders from ~USD 1,500; lead time 10–25 working days.
EP-R87 Inline Helical Gear Reducer – Heavy Duty Gearmotor
The EP-R87 inline helical gear reducer is the frame-87 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-R87 delivers maximum output torque of 3000 Nm and supports permitted radial loads up to 19,000 N N. Motor power compatibility spans from 0.12 kW through high-power configurations, with gear ratios ranging from i = 3.57 to i = 199.81. The EP-R87 is the natural choice for recycling, mining conveyors, large-scale 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.
With output torque reaching 3,000 Nm and a permitted radial load up to 19,000 N, the EP-R87 enters heavy-industry territory, replacing custom-engineered drive solutions with a catalogue unit that ships in standard lead times.
EP-R87 — standard foot-mount (R) inline helical gear reducer
Available Configurations
R87
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.
RF87
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.
R87 with Pre-stage
Two or three-stage combinations extending gear ratio coverage while maintaining the EP-R87 output shaft dimensions. Contact Ever Power for specific pre-stage options.
Two or three-stage combinations extending gear ratio coverage while maintaining the EP-R87 output shaft dimensions. Contact Ever Power for specific pre-stage options.
Technical Specifications
| Parameter | Value / Range |
|---|---|
| Frame Size | 87 |
| Motor Power Range | 0.12 kW – 160 kW (config.) |
| Gear Ratio (i) | 3.57 – 199.81 |
| Max Output Torque | 3000 Nm |
| Gear Unit Weight (foot/flange) | 87–88 kg / 94–95 kg |
| Max Permitted Radial Load | 19,000 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-R87
| Output Speed / Input Speed [rpm] | Output Torque [Nm] | Gear Ratio i | Radial Load [N] | Service Factor fB | Model |
|---|---|---|---|---|---|
| 1377 | 9 | 1.05 | 18525 | 1.20 | R87 |
| 1208 | 11 | 1.19 | 19000 | 1.35 | R87 |
| 1033 | 13 | 1.40 | 19000 | 1.60 | R87 |
| 906 | 14 | 1.60 | 19000 | 1.80 | R87 |
| 702 | 17 | 2.06 | 19000 | 2.35 | R87R57 |
| 616 | 19 | 2.35 | 19000 | 2.65 | R87R57 |
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 | RF87 |
| 87 | Frame size designation | R87 |
| Pre-stage suffix | Additional gear stage for extended ratio | R87R77 |
Industry Applications
Heavy Conveyor Systems
Belt conveyors, apron conveyors, and bucket elevators in mining, quarrying, and bulk material handling facilities specify the EP-R87 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-R87 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-R87'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-R87's high starting torque and consistent speed characteristics under variable-viscosity loads.
Recycling, Mining Conveyors, Large-Scale Processing
Applications in recycling, mining conveyors, large-scale processing environments rely on the EP-R87 for its combination of output torque, sealed maintenance-free operation, and multi-orientation mounting flexibility.
Applications in recycling, mining conveyors, large-scale processing environments rely on the EP-R87 for its combination of output torque, sealed maintenance-free operation, and multi-orientation mounting flexibility.
Customer Case Studies
Netherlands · Recycling Industry
★★★★★
A Dutch waste-processing facility installed EP-R87 drives on their shredder infeed conveyor. The units handle intermittent peak torques when large objects are fed. "The torque capacity of the EP-R87 absorbed the shock loads that were destroying our previous helical-bevel units every three to four months. We've now run for 18 months without a single gearbox failure in the same application."
Argentina · Mining Operations
★★★★★
An Argentine open-pit copper mine uses EP-R87 gearmotors on their secondary crushing conveyor discharge drives. Continuous abrasive dust exposure was a concern. "The IP55 sealed housing proved itself. After two years of 24/7 operation in dusty mine conditions, we opened one unit for inspection—the internal gearing showed minimal wear and the lubricant was still within specification. We are now ordering these units as our standard for this application."
Spain · Cement Plant
★★★★☆
A cement production facility in Catalonia replaced bevel-helical drives on their raw meal conveyor bucket elevator with EP-R87 units. The inline coaxial arrangement simplified their maintenance access. "Access time for a gearbox inspection dropped from 4 hours to 45 minutes because we no longer need to disconnect an external bevel stage. The R87's inline design is a genuine maintenance advantage in our plant layout."
Frequently Asked Questions
Why Specify the EP-R87 from Ever Power?
Ever Power delivers the EP-R87 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-R87 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.