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-R57 Inline Helical Gearmotor – High Torque Speed Reducer
The EP-R57 helical gear reducer provides up to 760 Nm output torque and a radial load capacity of 7,553 N. Suitable for food processing conveyors, water treatment scrapers, and textile machinery. IP55 sealed. MOQ: 1–5 sample units; mixed orders from ~USD 1,500; lead time 10–25 working days.
EP-R57 Inline Helical Gearmotor – High Torque Speed Reducer
The EP-R57 inline helical gear reducer is the frame-57 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-R57 delivers maximum output torque of 760 Nm and supports permitted radial loads up to 7,553 N N. Motor power compatibility spans from 0.12 kW through high-power configurations, with gear ratios ranging from i = 3.57 to i = 186.89. The EP-R57 is the natural choice for food processing, chemical, water treatment 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-R57's large permitted radial load of up to 7,553 N allows direct coupling of heavy sprockets and pulleys in demanding conveyor head-drive applications without external bearing pedestals.
EP-R57 — standard foot-mount (R) inline helical gear reducer
Available Configurations
R57
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.
RF57
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.
R57 with Pre-stage
Two or three-stage combinations extending gear ratio coverage while maintaining the EP-R57 output shaft dimensions. Contact Ever Power for specific pre-stage options.
Two or three-stage combinations extending gear ratio coverage while maintaining the EP-R57 output shaft dimensions. Contact Ever Power for specific pre-stage options.
Technical Specifications
| Parameter | Value / Range |
|---|---|
| Frame Size | 57 |
| Motor Power Range | 0.12 kW – 160 kW (config.) |
| Gear Ratio (i) | 3.57 – 186.89 |
| Max Output Torque | 760 Nm |
| Gear Unit Weight (foot/flange) | 23–25 kg / 27–28 kg |
| Max Permitted Radial Load | 7,553 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-R57
| Output Speed / Input Speed [rpm] | Output Torque [Nm] | Gear Ratio i | Radial Load [N] | Service Factor fB | Model |
|---|---|---|---|---|---|
| 538 | 6 | 2.70 | 6565 | 0.90 | RF57 |
| 486 | 7 | 3.00 | 6774 | 1.00 | RF57 |
| 424 | 8 | 3.41 | 7087 | 1.10 | R57 |
| 372 | 9 | 3.88 | 7211 | 1.30 | R57 |
| 252 | 13 | 5.74 | 7448 | 1.90 | R57 |
| 174 | 19 | 8.31 | 7543 | 2.75 | R57R37 |
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 | RF57 |
| 57 | Frame size designation | R57 |
| Pre-stage suffix | Additional gear stage for extended ratio | R57R77 |
Industry Applications
Heavy Conveyor Systems
Belt conveyors, apron conveyors, and bucket elevators in mining, quarrying, and bulk material handling facilities specify the EP-R57 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-R57 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-R57'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-R57's high starting torque and consistent speed characteristics under variable-viscosity loads.
Food Processing, Chemical, Water Treatment
Applications in food processing, chemical, water treatment environments rely on the EP-R57 for its combination of output torque, sealed maintenance-free operation, and multi-orientation mounting flexibility.
Applications in food processing, chemical, water treatment environments rely on the EP-R57 for its combination of output torque, sealed maintenance-free operation, and multi-orientation mounting flexibility.
Customer Case Studies
Singapore · Food & Beverage Processing
★★★★★
A contract beverage manufacturer in Singapore retrofitted EP-R57 gearmotors on their bottle-wash tunnel conveyor drives, replacing older worm units that were running hot. "Surface temperature dropped from 78°C to 41°C after the switch. We also eliminated the oil-change schedule entirely since the EP-R57 runs sealed for life—saving about 40 maintenance-hours per year across eight conveyors."
France · Water Treatment Plant
★★★★★
A French municipal utility specified EP-R57 units for slow-speed sludge scrapers in circular clarifiers. The M4 (shaft-up) mounting was critical. "We've operated these drives for three years in partly submerged mounting conditions with splash exposure. The IP55 housing has shown no signs of ingress and the units have required zero unscheduled maintenance since installation."
India · Textile Machinery
★★★★☆
An Indian textile machinery manufacturer in Surat uses EP-R57 drives on their wide-format fabric stentering machines. Consistent low-vibration speed is essential to prevent fabric tension variation. "The helical gearing gives us smoother rotation at 45 rpm than our previous drives delivered at double the price. The units also run quieter, which matters on our factory floor where workers operate eight-hour shifts."
Frequently Asked Questions
Why Specify the EP-R57 from Ever Power?
Ever Power delivers the EP-R57 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-R57 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.