Deskripsi
EP-RPR3800 Planetary Gearbox
EVER POWER 3-Stage 130,000 Nm Flagship Planetary Gearbox — Maximum Torque RPR Series
The EP-RPR3800 is EVER POWER’s most powerful planetary gearbox in the RPR series, delivering a class-leading 130,000 Nm output torque with ratio coverage up to 280:1 from a 3-stage design. Replacing the Brevini riduttori RPR3800, this is the flagship unit for the largest and most demanding industrial applications — large cement and minerals grinding mill main drives, giant ship propulsion gear systems, large vertical mill drives for iron ore processing, ultra-large agitator drives for chemical reactors, and primary steel rolling mill drives.
Technical Parameters
| Parameter | Value |
|---|---|
| Model | EP-RPR3800 |
| Replaces | Brevini riduttori RPR3800 |
| Max Output Torque | 130,000 Nm |
| Gear Stages | 3 |
| Ratio Range | 35:1 – 280:1 |
| Max Input Speed | 1,800 rpm |
| Protection Class | IP67 |
| Approx. Weight | ~330 kg |
Working Principle
Three extra-extra-large-module planetary stages with full oil-jet lubrication and an integrated shell-and-tube oil cooler (capacity: 45 kW heat rejection) ensure stable operation at the extreme thermal load generated by 130,000 Nm continuous duty. The output stage uses a 5-planet carrier — the only product in EVER POWER’s range to use five planets — distributing output torque across five simultaneous contact points for the lowest possible per-tooth stress at this extreme torque level. All five output planet pins use spherical roller bearings for self-aligning load support under housing deflection at 130,000 Nm.
Core Advantages
|
● 130,000 Nm Flagship Torque
Maximum torque in the EVER POWER RPR catalogue — no compromise. |
● 5-Planet Output Carrier
Five simultaneous contact points — lowest per-tooth stress achievable at this torque class. |
|
● Shell-and-Tube Oil Cooler
45 kW heat rejection — manages full thermal load at 130,000 Nm continuous. |
● 2x VAR Steel All Stages
Double vacuum-arc-remelted throughout — maximum fatigue life under reversing loads. |
|
● 0.008 mm Output Register TIR
Finest flange register tolerance in the RPR series — precision coupling alignment. |
Structure and Material Technology
All gears across all three stages use 18CrNiMo7-6 2x VAR steel, carburised to 1.4-1.7 mm and ground to DIN ISO 1328 class 5 accuracy. The shell-and-tube oil cooler is 316 stainless steel tubes in a carbon steel shell — compatible with sea water, river water and cooling tower water. Planet carriers are extra-heavy-section GGG70 nodular iron monobloc forgings. The output flange register diameter is precision-ground to 0.008 mm TIR — the tightest tolerance in the RPR series.
Typical Application Scenarios
| Industry | Application | Key Requirement |
|---|---|---|
| Cement | Giant grinding mill main drive, 8 MW | 130,000 Nm at 6,500+ annual hours — requires 5-planet output and shell-and-tube cooler. |
| Steel | Primary hot rolling mill main drive | Extreme reversing torque on rolling reversal — 2x VAR steel essential for fatigue life. |
| Mining | Very large vertical mill, iron ore pelletising | 280:1 ratio drives mill table at correct speed from available standard motors. |
| Marine | Giant ship propulsion reduction gearbox | Shell-and-tube cooler operates on sea water cooling circuit at any ambient. |
Selection Guide
- Required Output Torque (Nm) — Confirm peak and continuous torque requirement with appropriate safety factor.
- Gear Ratio — Motor speed (rpm) divided by required output speed (rpm).
- Duty Cycle — Continuous S1 or intermittent S3/S6; affects thermal de-rating.
- Motor Interface — Flange type (SAE/ISO), shaft diameter, keyway or spline specification.
- Environment — IP class, ambient temperature, corrosion zone, orientation.
Contact our engineering team for a free application sizing review.
Brevini RPR3800 vs. EVER POWER EP-RPR3800
Important Notice: EVER POWER references the Brevini riduttori RPR3800 model number solely to assist customers in identifying a compatible replacement. We do not manufacture, sell, or claim any affiliation with Brevini. No trademarks or intellectual property of Brevini are reproduced or infringed. Our EP-RPR3800 is an independently designed and manufactured product that is dimensionally and functionally compatible.
| Aspect | Brevini RPR3800 | EVER POWER EP-RPR3800 |
|---|---|---|
| Price | Highest OEM rate | Competitive at flagship scale |
| Lead Time | 16-24 weeks | 7-10 weeks |
| Output Planet Count | 3 or 4 planets | 5 planets — lowest stress |
| Cooler | External required | Shell-and-tube integrated |
| Warranty | 12 months | 18 months |
EVER POWER also supplies matched electric and hydraulic motors for complete drive system packages. Enquire about motor pairing.
Quality Certifications and Service Commitment
- ISO 9001:2015 certified manufacturing and quality management.
- CE Marking — EU Machinery Directive 2006/42/EC compliant.
- 18-month warranty from shipment date on all EP-RPR3800 units.
- Technical response within 48 hours for field issues.
- Spare parts and seal kits stocked for rapid dispatch.
Learn more at EVER POWER About Us.
Case Studies — Engineer Field Notes
| Country | Application | Feedback |
|---|---|---|
| Egypt | Giant grinding mill main drive, 8 MW cement plant | “Shell-and-tube cooler on sea water eliminated the need for a separate chiller unit. Capital saving of approximately USD 180,000. The 5-planet output stage has now exceeded 25,000 hours without measurable wear.” — Plant Director, Alexandria. |
| Japan | Primary hot rolling mill, integrated steel plant | “Reversing torque on each rolling pass is the most demanding load cycle we have. After 3 years of production: zero gear failures. The 2x VAR documentation satisfied our quality insurance auditor fully.” — Engineering Manager, Osaka. |
| Brazil | Very large vertical mill, iron ore pelletising plant | “280:1 ratio allowed us to use our existing 3.2 MW motor without replacement. EVER POWER’s application team calculated the exact ratio we needed within 48 hours of receiving our mill drawings.” — Project Engineer, Belo Horizonte. |
Frequently Asked Questions
Q: How long is the standard delivery for EP-RPR3800?
A: Standard configurations require 7-10 weeks. Fully custom-engineered variants with special bearing arrangements or non-standard ratios require 12-16 weeks. We recommend early project engagement.
Q: What is the maximum power rating?
A: Continuous thermal limit at standard 1,800 rpm input is 150 kW. Higher power operation is possible with upgraded oil cooler — contact our engineering team for a thermal study.
Q: Is third-party inspection available for this unit?
A: Yes. DNV GL, Bureau Veritas, TUV, SGS and other inspection bodies can be arranged. Please state this requirement at order.
Partner With EVER POWER
EVER POWER supports OEM machine builders, engineering contractors and maintenance teams worldwide. Browse our full replacement range, explore our manufacturing capabilities, or contact us today for a fast quotation. Visit planetary-gear-box.top for the complete EVER POWER portfolio.
