EP-Winch Drive Planetary Gearbox Reducer
The EP Winch Drive Planetary Gearbox Reducer is a multi-stage planetary reduction unit purpose-built to fit inside cable drums, converting hydraulic or electric motor input into the high-torque, low-speed output demanded by industrial winch systems. Rated in conformance with FEM standards, class M5 (T5-L2), it supports output speeds up to 25 rpm and torque values ranging from 870 N·m to 275,000 N·m across the full EP series. Its rotating housing flange design allows the gearbox to serve simultaneously as the structural drum mount — eliminating secondary bearing housings and reducing overall system weight and footprint.
EP Series — Heavy-Duty Winch Solutions
EP Winch Drive Planetary Gearbox
Engineered for lifting, pulling, and tensioning operations in demanding environments — the EP Winch Drive Planetary Gearbox delivers superior torque output, compact drum-fit design, and FEM M5-rated performance trusted by engineers across mining, marine, construction, and oil & gas sectors worldwide.
Gear Ratio: 5.3–400
FEM M5 Rated
Hydraulic & Electric Motor Ready
1. Technical Specifications — EP Winch Drive Planetary Gearbox Series
The following table presents 20 key technical parameters drawn from the EP-Winch Drive Planetary Gearbox. Data conforms to FEM M5 / DIN ISO 9001 engineering standards. For non-standard torque or ratio requirements, custom-ratio winch drive planetary gearbox configurations are available on request.
| Model | Max Torque (N·m) | Gear Ratio (i) | Max Input Speed (rpm) | Braking Torque (N·m) | Max Output Speed (rpm) | Duty Class |
|---|---|---|---|---|---|---|
| EP400W1 | 870 | 6.09 | 1,000 | 130 | 25 | FEM M5 |
| EP401W1 | 1,300 | 6.2 | 1,000 | 270 | 25 | FEM M5 |
| EP402W2 | 4,000 | 12.4 – 37.1 | 3,500 | — | 25 | FEM M5 |
| EP403W2 | 4,000 | 15.4 – 40 | 3,500 | 270 | 25 | FEM M5 |
| EP405W | 7,000 | 20 – 80 | 3,500 | 270 | 25 | FEM M5 |
| EP405.4W | 5,500 | 26 – 57 | 3,500 | 280 | 25 | FEM M5 |
| EP406AW | 12,500 | 23 – 220 | 3,500 | 430 | 25 | FEM M5 |
| EP406W | 13,000 | 28 – 140 | 3,500 | 430 | 25 | FEM M5 |
| EP406BW3 | 17,500 | 63 – 136 | 3,500 | 430 | 25 | FEM M5 |
| EP407AW | 18,000 | 38 – 136 | 3,500 | 430 – 530 | 25 | FEM M5 |
| EP407W3 | 26,000 | 63 – 136 | 3,500 | 530 | 25 | FEM M5 |
| EP410W3 | 37,500 | 62 – 177 | 3,500 | 530 | 25 | FEM M5 |
| EP413W3 | 42,500 | 86 – 172 | 3,500 | 610 | 25 | FEM M5 |
| EP414W3 | 67,000 | 76 – 186 | 3,500 | 1,200 | 25 | FEM M5 |
| EP415W3 | 100,000 | 81 – 215 | 3,000 | 1,200 | 25 | FEM M5 |
| EP416W3 | 140,000 | 87 – 255 | 3,000 | 2,000 | 25 | FEM M5 |
| EP417W3 | 200,000 | 123 – 365 | 3,000 | 2,000 | 25 | FEM M5 |
| EP419W3 | 275,000 | 161 – 306 | 2,500 | 3,000 | 25 | FEM M5 |
| All EP-W (Std.) | 870 – 275,000 | 5.3 – 400 | 1,000 – 3,500 | 130 – 3,000 | 25 max | FEM M5 (T5-L2) |
| Interchangeable With | Rexroth GFT…W Series / Bonfiglioli 800 Series — same mounting dimensions, drop-in replacement | |||||
Note: All values represent nominal operating conditions. Actual performance may vary with motor selection, lubrication type, and ambient temperature. Consult application engineers for duty cycles exceeding 10 hours/day or ambient temperatures below −10°C or above +50°C.
2. Five Key Advantages of the EP Winch Drive Planetary Gearbox
① Drum-Integrated Design
The gearbox housing features two close-mounted flanges — one bolted to the winch frame, the other fixed directly to the cable drum. This integrated architecture means the drive housing itself becomes the primary structural element of the drum assembly. Engineers save on installation time and eliminate the need for external drum bearings, resulting in a more compact, lighter-weight winch system without sacrificing structural integrity.
② Broad Torque Range
With output torque spanning from 870 N·m (EP400W1) up to 275,000 N·m (EP419W3), the EP Winch Drive Planetary Gearbox covers practically every lifting and pulling application — from small utility winches on service trucks to heavy-duty offshore mooring and mine hoist systems. Engineers can select the exact model that fits their load cycle without over-specifying, reducing both capital cost and operating mass.
③ FEM M5 Certified Performance
Performance figures for the EP Winch Drive Planetary Gearbox are verified against FEM standards, class M5 (T5-L2), with output maximum speeds of 25 rpm — the globally recognized benchmark for self-propelled and onboard cranes. This certification gives procurement teams in regulated industries, including EU CE-marked machinery and North American ASME-governed crane systems, immediate confidence in the drive's load cycle suitability.
④ Universal Motor Compatibility
The EP planetary winch gearbox accommodates axial piston hydraulic motors, hydraulic orbit motors, and electric motor adaptors. Optional hydraulic accessories include pressure relief valves and overcenter valves, making it straightforward to integrate into existing hydraulic circuits on cranes, excavators, or marine vessels. This versatility reduces the need for custom adaptor plates and shortens procurement lead times considerably.
⑤ Drop-in Interchangeability
Technical data and installation dimensions for the EP400W series match those of Rexroth GFT…W and Bonfiglioli 800 Series gearboxes, meaning the EP unit can serve as a direct replacement without structural modification. For maintenance teams managing legacy fleets or for OEMs seeking to diversify their supply chain, this interchangeability dramatically lowers the total cost of ownership and shortens machine downtime during overhaul cycles.
3. Product Overview: EP Winch Drive Planetary Gearbox
The EP Winch Drive Planetary Gearbox is an internally-fitted multi-stage planetary reducer specifically designed to be installed inside a winch drum, converting high-speed motor rotation into the controlled, high-torque output required for cable spooling, anchor handling, load lowering, and horizontal pulling. Unlike externally-mounted gearboxes that demand additional structural bracketing and alignment procedures, the EP- Winch Drive Planetary Gearbox uses a self-contained rotating housing that simultaneously anchors to the winch frame and drives the cable drum — dramatically simplifying the mechanical package.
The design philosophy behind the winch drive planetary gearbox centers on maximizing torque density per unit volume. Planetary gear trains inherently distribute load across multiple planet gears orbiting a central sun gear, which allows the EP-Winch Drive Planetary Gearbox to transmit torques that would be physically impossible for equivalent parallel-shaft or bevel-helical units of the same envelope. This load-sharing characteristic also reduces tooth contact stresses, extends gear and bearing fatigue life, and keeps operating temperatures within manageable limits even during extended duty cycles in hot or harsh environments.
Available gear ratios span from 5.3 to 400, covering everything from fast-haul light-tension rope applications to slow but powerful heavy-lift winch configurations. Input speeds up to 3,500 rpm are accepted on standard models, making the EP-Winch Drive Planetary Gearbox compatible with both fixed-displacement and variable-displacement hydraulic motors commonly found on crane hydraulic circuits and offshore deck machinery.
4. How the Winch Drive Planetary Gearbox Works
At its core, the EP Winch Drive Planetary Gearbox operates on classical epicyclic (planetary) gear geometry. The input shaft, driven by the motor, connects to the central sun gear. Surrounding the sun gear are typically three or more planet gears, each meshing simultaneously with the sun gear and with the fixed internal ring gear (annulus). As the sun gear rotates, the planet gears revolve around it, carrying the planet carrier — which constitutes the output — with them. This arrangement multiplies torque proportionally to the gear ratio while dividing rotational speed by the same factor.
In the EP series, multiple planetary stages are arranged in series to achieve high overall gear ratios (up to 400:1) within a single compact axial length. Each stage passes its output to the sun gear of the next, providing progressive torque multiplication. The final output stage drives the outer housing flange, which in a winch application is directly coupled to the cable drum. As the housing rotates, the drum turns with it, winding or releasing the rope.
The rotating housing principle is what sets the winch drive planetary gearbox apart from conventional reducers. Rather than the housing being a static structural shell, the EP housing actively participates in torque transmission. One flange is bolted rigidly to the stationary winch frame; the other flange rotates and drives the drum. This dual-function construction eliminates the need for a separate drum mounting flange and the associated additional bearing supports, making the complete winch assembly lighter and mechanically more elegant.
When a hydraulic parking brake option is selected, the brake acts on the input side of the gear train, locking the sun gear shaft when hydraulic pressure is removed. This fail-safe design ensures that loads cannot descend or reverse in the event of hydraulic pressure loss — an essential safety feature for crane hoisting and underground mining hoist applications where uncontrolled load movement is a critical hazard.
5. Materials & Construction
The durability of a planetary winch gearbox in real-world lifting conditions depends critically on material selection and heat treatment precision. Each component in the EP series is specified to industrial-grade metallurgical standards used by tier-one crane and mining OEMs globally.
Planet & Sun Gears: Manufactured from alloy steel grades equivalent to AISI 4140 or 20CrMnTi, with carburizing and case-hardening applied to achieve surface hardness in the range of 58–62 HRC while maintaining a tough core. The tooth profile is machined to DIN/ISO Grade 6 accuracy class, ensuring minimal transmission error and quiet running even at higher input speeds. Final tooth flanks are honed or shot-peened to improve surface finish and compressive residual stress, which directly extends fatigue life under the cyclic loading typical of crane hoisting.
Ring Gear (Annulus): Produced from medium-carbon alloy steel (40Cr or 42CrMo equivalent) with induction hardening on the tooth surfaces. The ring gear is precision ground to match the planet gear specifications, and its bore is finished to H7 tolerance to maintain consistent planetary mesh geometry across the full torque range.
Housing & Flanges: The outer rotating housing is cast from high-grade ductile iron (GGG-50 / QT500) or fabricated from S355 structural steel on larger frame sizes. Flanges are machined to tight flatness and perpendicularity tolerances to ensure accurate alignment with the winch frame and drum, preventing premature bearing and seal wear caused by misalignment. Flange bolt patterns conform to standard SAE and metric pitch circles for direct motor adaptor compatibility.
Bearings: The EP Winch Drive Planetary Gearbox uses a robust rolling bearing system specifically selected to absorb the combined radial and axial forces exerted on the ring gear and output flange under full torque load. Main output bearings are typically matched-pair tapered roller or angular contact bearings rated to an L10 service life exceeding 20,000 hours at nominal load, aligning with ISO 281 bearing life calculation standards. Planet pin bearings use needle or cylindrical roller bearings for high load capacity in minimal radial space.
Sealing System: Radial lip seals (PTFE-lipped or NBR compound) protect the internal gear oil from external contamination including water ingress, dust, and rope lubricant splash — a real concern in marine deck winch and construction site environments. Breather vents with check valves prevent pressure buildup from thermal cycling during start-stop operations.
Lubrication: The gearbox operates on splash lubrication with an oil fill volume appropriate to each frame size. Recommended lubricant grade is ISO VG 220 mineral gear oil (GL-4/GL-5 rating) or equivalent synthetic PAO gear oil for extreme temperature environments. Oil change intervals are specified at 3,000 operating hours or 18 months, whichever comes first.
6. Application Scenarios
The EP Winch Drive Planetary Gearbox is deployed across a wide spectrum of load-handling and tension-control applications. Representative use cases are described below.
Crane Hoisting — Onboard & Self-Propelled
Mobile cranes, tower cranes, and ship-mounted knuckle boom cranes all rely on the compact winch drive planetary gearbox for precise load control. The FEM M5 rating ensures the drive meets the duty-cycle demands of continuous lifting operations in ports, shipyards, and construction sites. Multiple EP models cover single-rope hook blocks from 3-tonne utilities to 250-tonne offshore heavy-lift configurations.
Mining Hoist & Underground Winch
Underground coal and hard-rock mining operations in regions including Colombia's Bucaramanga and Medellín industrial zones and across the U.S. mountain states use winch drive gearboxes for personnel and material cages, rope haulage systems, and slope hoist inclines. The robust bearing system and high-braking-torque options of the EP series are specifically suited to the long-duty, high-cycle demands of mine hoist applications. The industrial winch planetary gearbox heavy-duty configuration in the EP410W3 and above is particularly appropriate for mine environments.
Oil & Gas — Drilling & Subsea
Offshore drilling platforms and pipeline laying vessels demand compact winch drive planetary gearboxes that can survive saltwater spray, vibration, and temperature extremes without seal failure or lubricant degradation. The EP series' IP-compatible sealed design, combined with option for ATEX-compatible brake modules, makes it a practical choice for the winch drive gearbox oil gas Colombia supplier market, as well as Gulf of Mexico and North Sea offshore deck machinery. Typical uses include tugger winches, anchor handling winches, and umbilical tensioners.
Port & Marine Mooring Equipment
Mooring winches at commercial ports — including Barranquilla port, one of Colombia's busiest — operate continuously against fluctuating vessel line tensions. The planetary winch gearbox Barranquilla port market specifically requires drives that maintain holding torque under dynamic loading without slipping. The EP series' hydraulic parking brake option locks the drum automatically when hydraulic pressure drops, preventing uncontrolled rope payout during power interruptions — a critical safety requirement under IMO mooring equipment guidelines.
Construction & Infrastructure
The winch drive gearbox Colombia construction sector is a growing market, with infrastructure expansion projects requiring reliable pulling equipment for formwork hoists, material hoists on high-rise projects, and cable-laying winches for bridge and tunnel construction. The planetary reducer's compact drum-fit format allows integration into purpose-designed winch drums that mount flush within structural ironwork, reducing the exposed mechanical footprint on active construction sites.
Truck-Mounted Recovery & Towing Winches
Truck-mounted crane recovery vehicles and heavy-vehicle recovery winches use compact planetary winch gearbox configurations to deliver pulling forces of 5 to 50 tonnes from within a space-constrained drum housing. The lower EP400W and EP405W models are popular choices for self-recovery and towing applications where packaging constraints are tight and weight is a premium consideration. The electric motor adaptor option is used in vehicles where hydraulic systems are not available.
7. Regulatory Compliance & Industry Standards
Buyers and engineers specifying a winch drive planetary gearbox for regulated applications should be aware of the following standards and regional requirements. These regulations govern the design, testing, and documentation of hoisting and pulling equipment that incorporates planetary gear drives.
European Union (EU/EEA): Machinery Directive 2006/42/EC applies to winch assemblies incorporating the EP gearbox when sold as part of a complete lifting machine. Essential Health and Safety Requirements (EHSRs) under this directive govern load-bearing components, braking systems, and overload protection. CE marking on the finished winch system requires that the planetary reducer meets design verification under EN ISO 4301 (crane duty classification) and EN 13135 (hoisting equipment — design requirements). Manufacturers should also consult EN 14492-1 (powered winches) for rope termination and rated capacity marking requirements.
United States (OSHA / ASME): OSHA 29 CFR 1926.1416 governs equipment design and inspection for construction crane hoisting components. ASME B30.7 (Base-Mounted Drum Hoists) specifies design factors, braking holding requirements, and load testing procedures for drum winches — directly applicable to systems built around the EP Winch Drive Planetary Gearbox. AGMA 6013-A16 and AGMA 2101-D04 provide gear rating standards applicable to enclosed industrial gear drives.
Colombia (ICONTEC / Ministerio del Trabajo): Colombia's industrial safety framework draws from ICONTEC NTC standards adapted from ISO and ASME. For lifting equipment in mining, the Ministerio de Minas y Energía enforces Decreto 1886 (underground mining safety regulation), which requires documented gear drive specifications and brake performance certification for all hoist systems. Winch drive planetary gearbox manufacturers or importers serving the winch drive planetary gearbox Medellín industrial and Bucaramanga industrial markets should ensure gear unit documentation includes Spanish-language technical datasheets, rated capacity labeling per ICONTEC NTC 2083, and third-party inspection reports from recognized bodies (ICONTEC, Bureau Veritas, or SGS).
ISO Global Standards: ISO 9001:2015 Quality Management System certification governs manufacturing process control. ISO 6336 provides the international basis for spur and helical gear load capacity calculation, and ISO 281 governs rolling bearing life calculation — both directly relevant to planetary gearbox engineering. FEM 1.001 (Federation Européenne de la Manutention) classifies lifting appliance drive components, and FEM M5 (T5-L2) — the rating class for the EP series — represents the second-highest duty classification, suitable for demanding industrial environments.
Australia, Canada, and Other Markets: In Australia, AS 1418 (Cranes, Hoists & Winches) series standards apply to drive components used in lifting equipment sold to Australian buyers. Canada follows CSA Z150 and provincial occupational health and safety acts for crane and hoist drive components. Buyers in South Korea and Japan must comply with KGS and JIS B 1702 gear precision standards respectively when incorporating planetary gear reducers into certified lifting machinery.
8. About Us
We are a dedicated manufacturer of industrial planetary gear systems, specializing in winch drives, slew drives, travel drives, and custom reduction solutions for demanding applications across mining, construction, marine, and energy sectors. Our engineering team brings decades of hands-on experience in planetary gear design, backed by advanced CNC gear grinding and precision machining capabilities that meet or exceed international gear standards including ISO 6336 and AGMA 6013.
Our production processes operate under ISO 9001:2015 certified quality management — every EP Winch Drive Planetary Gearbox undergoes full assembly inspection, gear contact pattern verification, and no-load running tests before shipment.
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9. Related Products — Complete Drive System Solutions
The EP Winch Drive Planetary Gearbox performs best as part of a fully matched drive system. We also supply complementary components engineered for system compatibility — eliminating the integration challenges that arise when mixing drives from multiple suppliers.
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Frequently Asked Questions
Q1. What is the best winch drive planetary gearbox for heavy-duty crane applications where I need a high braking torque without adding external brake modules?
For heavy-duty crane duty with integrated braking, the EP414W3 through EP419W3 models include hydraulic-released parking brake options delivering braking torques from 1,200 to 3,000 N·m — sufficient to hold rated cable loads without external add-on brakes. The brake acts on the input shaft inside the gearbox housing, using spring-applied hydraulic-release architecture that defaults to the locked state if hydraulic pressure is lost. This fail-safe configuration is compatible with ISO 4301 crane duty class M5 requirements and is routinely specified on ship-mounted cranes, offshore deck cranes, and large tower crane jib winches. If you can describe your rope load and rope speed requirements, our application engineers can recommend the appropriate model.
Q2. How does the EP winch drive planetary gearbox compare with the Rexroth GFT-W series — can I use it as a direct replacement without machining the drum bore?
Yes — the EP-W series is dimensionally matched to Rexroth GFT…W and Bonfiglioli 800 Series installation envelopes. Mounting flange bolt circles, pilot bore diameters, and drum bore dimensions follow the same reference standard, which means the EP unit can be removed and replaced in a maintenance cycle without modifying the host winch frame or drum. It is worth verifying the specific model-to-model dimensional table against your existing assembly drawing, as some sub-models in both families have minor revision differences. Our technical team can provide a dimensional comparison datasheet for any EP model vs. its Rexroth or Bonfiglioli equivalent on request.
Q3. What distinguishes a compact planetary winch gearbox from a standard inline planetary reducer when space inside the drum is severely restricted?
A compact planetary winch gearbox like the EP series is purpose-engineered to fit inside the drum bore with the motor protruding from one end and the drum flanges directly forming the structural joint. This differs from a standard inline planetary reducer where the housing is a fixed static case and a separate output shaft or flange connects externally to the drum. In a drum-integrated design, the overall axial length of the drive system is dramatically shorter because no separate drum mounting hub or external pillow block bearings are needed. The practical result is that winch drums can be made with shorter barrel lengths — often 100–200mm shorter — reducing overall crane dead weight and improving boom tip geometry for onboard crane applications.
Q4. Which motor type — axial piston hydraulic or electric — gives better efficiency when paired with the EP compact planetary winch gearbox for a port mooring winch in a tropical climate?
Both motor types are compatible with the EP series, and the choice depends more on the ship's power infrastructure than on the gearbox itself. Axial piston hydraulic motors deliver higher power density per kilogram and handle shock loads well — advantageous in mooring duty where line tension spikes are common. However, hydraulic circuits require careful management in tropical port environments to prevent oil degradation from heat. Electric motor configurations with variable frequency drives (VFDs) offer more precise speed control and lower maintenance burden. For Barranquilla port and similar tropical locations, if a shore power grid is reliable, a high-efficiency IE3 electric motor with a VFD paired to the planetary winch gearbox often results in lower total operating cost over a 10-year vessel service life.
Q5. When should I replace the gear oil in my EP winch drive planetary gearbox and what type of oil is recommended for offshore or tropical operation?
Standard oil change interval is every 3,000 operating hours or 18 months, whichever comes first. For offshore or tropical environments where operating temperature regularly exceeds 40°C, we recommend switching from mineral ISO VG 220 gear oil to a full-synthetic PAO (polyalphaolefin) gear oil of equivalent viscosity grade. Synthetic oil offers significantly better oxidation stability, which extends the change interval to 5,000–6,000 hours and reduces the risk of sludge formation that can block planetary carrier oil passages. Avoid mixing mineral and synthetic oils. When topping up, always use the same brand and viscosity grade. Drain, flush with a light flushing oil, and refill when transitioning from mineral to synthetic to avoid compatibility issues.
Q6. How do I calculate the correct gear ratio for my planetary winch gearbox when I know the required rope speed and motor RPM?
The gear ratio (i) is calculated as: i = Motor RPM ÷ Required Output RPM. First, determine the required output RPM from rope speed: Output RPM = (Rope Speed in m/min) ÷ (π × Drum Diameter in meters). For example, a target rope speed of 15 m/min with a 0.6-m-diameter drum gives Output RPM = 15 ÷ (π × 0.6) ≈ 7.96 rpm. If your motor runs at 1,400 rpm, you need i = 1,400 ÷ 7.96 ≈ 176. Browse the EP series table to select a model whose ratio range brackets 176 — the EP415W3 (ratio 81–215) or EP416W3 (ratio 87–255) would both cover this requirement. Always apply a service factor of at least 1.3–1.5 for crane duty when selecting the output torque rating.
Q7. Which planetary winch gearbox heavy duty model is best suited for a mine hoist in Colombia where I need to handle loads exceeding 80 tonnes on an inclined shaft?
For inclined shaft mine hoisting with loads exceeding 80 tonnes, the EP415W3 (max torque 100,000 N·m) or EP416W3 (max torque 140,000 N·m) would typically be the starting point for selection, depending on drum diameter and rope configuration. For a multi-rope or Koepe-type arrangement, multiple units may be used in parallel. Critical for Colombian underground mine compliance under Decreto 1886 is the braking holding torque — both models offer 1,200–2,000 N·m brake torque respectively, which combined with the gear ratio provides rope-holding capacity well in excess of the static load. Our applications engineering team can assist with the full hoist sizing calculation including acceleration torque and thermal duty cycle analysis.
Editor: PXY
