Descrizione
EP-PWD3300 Planetary Winch Drive Gearbox – 33,000 Nm
Brevini PWD3300 Compatible Replacement | EVER POWER
The EP-PWD3300 represents EVER POWER’s solution for high-cycle, high-torque winching where continuous duty is the norm. Engineered as a functional equivalent to the Brevini riduttori PWD3300, this unit is built for machine builders and operators who need 33,000 Nm output torque with predictable, maintenance-friendly performance.
Product Overview
Key applications: heavy deck cranes on cargo vessels, land-based drilling rig drawworks, offshore derrick assist winches, heavy-duty forestry cableway systems. The EP-PWD3300 features a reinforced output-stage planet carrier with a 4-planet configuration to maximise load-sharing efficiency and extend bearing life in continuous-duty cycles.
Technical Parameters
| Parameter | Value |
|---|---|
| Model | EP-PWD3300 |
| Replaces | Brevini riduttori PWD3300 |
| Max Output Torque | 33,000 Nm |
| Gear Stages | 3 |
| Planet Count (Output Stage) | 4 planets |
| Ratio Range | 30:1 – 200:1 |
| Max Input Speed | 1,000 rpm |
| Efficiency | >= 95% (per stage) |
| Housing Material | GGG50 ductile iron |
| Protection Class | IP66 |
| Operating Temp. | -30 degC to +80 degC |
| Approx. Weight | ~145 kg |
| Brake Option | Spring wet multi-disc / dry disc / none |
| Surface Treatment | Epoxy primer + polyurethane topcoat |
Working Principle
The 4-planet output stage is the defining feature of the EP-PWD3300. Conventional 3-planet designs distribute load across three contact points. Adding a fourth planet increases simultaneous tooth contacts, reducing tooth root stress by approximately 25% at the same torque level – resulting in longer fatigue life or greater tolerance of peak overload transients. Helical-cut teeth across all stages further reduce noise and smooth the torque curve for precision crane operations.
Core Advantages
| ► 4-Planet Output Stage 25% lower tooth stress – extended life in continuous high-cycle duty. |
► Full Helical Tooth Profile Quieter operation and gradual load engagement across all three stages. |
| ► High Overload Tolerance Handles 2.8x rated torque peaks without plastic deformation of gear teeth. |
► Long Service Interval Oil change intervals up to 2,500 hours with recommended synthetic lubricant. |
| ► Direct Drop-In for Brevini PWD3300 Identical bolt pattern, shaft dimensions and brake release port locations minimise retrofit downtime. |
|
Structure and Material Technology
All internal gear components are manufactured from 20CrMnTi and 17CrNiMo6 case-hardening steels. Carburising depth is controlled to 0.9-1.3 mm. After heat treatment, all gears undergo profile grinding to ISO accuracy grade 5. The output carrier is a single-piece forged construction. Radial shaft seals on the output side are double-lip FKM units rated for continuous immersion in synthetic oils.
Typical Application Scenarios
| Industry | Application | Scenario Notes |
|---|---|---|
| Marine/Offshore | Cargo vessel derrick winch | High cycle rate requires extended bearing life – 4-planet stage delivers this. |
| Drilling | Land rig drawworks fast-line winch | Peak torque transients during pipe-stuck events are absorbed without damage. |
| Forestry | Running skyline cableway bull-block drive | Helical gearing reduces noise in noise-sensitive logging areas. |
| Heavy Lift | Gantry crane load equaliser winch | Smooth torque output essential for synchronised multi-crane lifts. |
Selection Guide
- Confirm Duty Cycle Class (S1 continuous or S3/S6 intermittent) to determine thermal de-rating.
- State Peak Torque including shock factor. EP-PWD3300 handles up to 2.8x rated torque.
- Motor Interface – SAE flange type, pilot diameter, shaft keyway dimensions.
- Brake Release Pressure – typically 25-50 bar hydraulic; confirm available circuit pressure.
- Drum Bore and Spline – provide drum drawing for our team to confirm fit.
Contact EVER POWER engineers for your free selection assessment.
Brevini PWD3300 vs. EVER POWER EP-PWD3300
Disclaimer: Reference to Brevini riduttori PWD3300 is purely for customer cross-reference convenience. EVER POWER does not manufacture, distribute or hold any certification on behalf of Brevini. The EP-PWD3300 is an independent EVER POWER design.
| Aspect | Brevini PWD3300 | EVER POWER EP-PWD3300 |
|---|---|---|
| Planet Count (Output Stage) | 3 planets | 4 planets – higher load share |
| Price | OEM premium | Cost-competitive alternative |
| Lead Time | 10-18 weeks | 3-6 weeks |
| Overload Tolerance | 2.5x rated | 2.8x rated |
| OEM/ODM Service | Not available | Full OEM drawing service available |
Complete motor and gearbox packages available. Ask about our motor supply program.
Quality Certifications and Service Commitment
- ISO 9001:2015 – Full manufacturing traceability and documentation package.
- CE Marking – European machinery compliance declaration supplied with each unit.
- 18-month warranty – Covers all material and manufacturing defects.
- Hydrostatic leak test on every unit before shipping.
Read more at EVER POWER About Us.
Case Studies – Engineer Field Notes
| Country | Application | Feedback |
|---|---|---|
| Saudi Arabia | Land drilling rig drawworks auxiliary, desert environment | “Operated at 48 degC ambient without oil degradation. Thermal management is clearly engineered into the design.” – Rig Manager, Eastern Province. |
| Poland | Steel plant ladle crane auxiliary hoist upgrade | “The 4-planet design has clearly improved bearing life over our previous 3-planet units.” – Maintenance Director, Katowice. |
| New Zealand | Forestry skyline cableway main winch | “The noise reduction from the helical gears is noticeable and welcomed by operators in native forest buffer zones.” – Operations Manager, Northland. |
Frequently Asked Questions
Q: Why choose 4 planets over the standard 3-planet design?
A: Four planets share output torque across more simultaneous tooth contacts. Each tooth carries less stress, extending pitting fatigue life – particularly important in high-cycle continuous-duty applications.
Q: Can you supply with Bosch Rexroth / Parker / Eaton motor flanges?
A: Yes. We stock or machine flanges to fit major hydraulic motor brands. Provide the motor model number in your enquiry.
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