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
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-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)
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
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.
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.
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
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.”
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.”
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
What is the maximum output torque of the EP-R57?
Can I mount the EP-R57 with the shaft pointing upward (M4)?
What is the maximum gear ratio available for the EP-R57?
What is the MOQ and lead time for EP-R57 orders?
How does the EP-R57 compare to the EP-R47?
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.