416W3 Winch Drive Planetary Gearbox Reducer

Power = torque x speed. At 200,000 Nm and 10 rpm: P = 200,000 x 10 x 2 x 3.14 / 60 = 209 kW. At 94% efficiency, the gearbox dissipates 12.6 kW as heat. If the output speed were 25 rpm (like the smaller models): P = 524 kW, heat = 31.4 kW. The oil-bath cooling capacity of the 416W3 housing is approximately 15-18 kW at +85 deg C oil temperature in still air. At 10 rpm, the thermal balance holds. At 25 rpm, it does not.

The output bearings carry 200,000 Nm of torque as a radial load. Bearing L10 life is inversely proportional to speed — doubling the output speed halves the bearing life at the same load. The 10 rpm limit ensures the output bearings achieve the FEM M6 design target of 30,000+ hours at continuous rated torque. At 25 rpm, the L10 life would drop to approximately 12,000 hours — below the M6 requirement and unacceptable for production mining winders.

On an 800 mm PCD drum: 10 rpm = 25.1 m/min. On a 600 mm PCD drum: 10 rpm = 18.8 m/min. These speeds are within the operational range of deep mining winders (15-30 m/min) and AHTS anchor handling (5-20 m/min). The 10 rpm limit does not restrict the practical applications — it aligns the gearbox output with the actual speed range the machines operate in. No 200,000 Nm winch application needs 25 rpm at the drum.

Ultra-Deep Mining Main Winders (800-1,500 m)

Main production winders at the deepest operating mines — South African gold and platinum mines at 1,000-1,500 metre depths, and Canadian nickel mines at 800-1,200 metres. The combined skip, ore, and rope weight at these depths reaches 80-120 tonnes. The 416W3 at ratio 200-300 provides the drum torque, and the 1,800 Nm brake holds the loaded skip at any point in the shaft with a safety factor exceeding 2.5 even at the deepest point where the rope weight is maximum.

Large AHTS Main Winches (300+ t Bollard Pull)

Main anchor handling winches on the largest class of AHTS vessels, deploying and recovering anchor chain assemblies weighing 150-250 tonnes from water depths of 1,000-2,500 metres. The 416W3 at ratio 150-250 with triple or quadruple electric motor drives provides the sustained line pull for deep-water anchor deployment, and the 1,800 Nm brake holds the chain at any depth during operational pauses. The slewing drive positions the stern roller and the auxiliary drives operate the tugger winches and chain stoppers.

Semi-Submersible Mooring Winches

Mooring winches on semi-submersible drilling rigs and floating production platforms maintaining station against ocean currents, wind, and wave forces. Each mooring leg may carry 100-200 tonnes of line tension during storm conditions. The 416W3 provides the torque to pay out or haul in wire rope under these tensions, and the 1,800 Nm brake holds the mooring line at constant tension during station-keeping — a function that may last weeks or months continuously. The track drive handles the anchor chain windlass on the same platform.

How does the 1,800 Nm brake physically differ from the 610 Nm brake in the 413W3?

The 1,800 Nm brake uses a fundamentally larger assembly: piston diameter approximately 60% greater, 4-5 friction discs instead of 3, and a Belleville spring stack producing nearly 3x the clamping force. The hydraulic release pressure remains within the 35-45 bar range because the larger piston area absorbs the increased spring force. The brake housing bore in the 416W3 is a dedicated section of the main housing casting — not an adaptor bolted to a standard housing — which ensures concentricity between the brake and the gear train without the alignment tolerances that add-on brake assemblies introduce.

How many motors does the 416W3 typically require?

At ratio 200, the motor input torque is 1,000 Nm — requiring approximately 1,800 cc/rev from a single hydraulic motor at 350 bar. This far exceeds any standard motor. Triple-motor (3 x 600 cc/rev) or quadruple-motor (4 x 450 cc/rev) hydraulic configurations are typical. Alternatively, a single or dual large-frame AC induction motor (500-800 kW, 1,000-2,500 rpm) with a variable-frequency drive provides the input power with simpler mechanics and regenerative braking capability. Most new-build 416W3 applications specify electric drive.

What crane capacity is needed to install a 1,850 kg winch drive?

Minimum 4,000 kg at the working radius. On AHTS vessels, the vessel crane handles the installation during dry-dock or quayside maintenance. On mining headframes, the installation crane is typically a dedicated overhead bridge crane with 5-10 tonne capacity built into the headframe structure. A purpose-built lifting frame matched to the 416W3 housing is essential — the unit cannot be slung with generic rigging due to the asymmetric weight distribution caused by the large brake assembly on one end. Contact Korea Ever-Power for the lifting frame specification.

What oil volume does the 416W3 require?

Approximately 35-50 litres depending on the ratio and mounting angle. Use API GL-5 SAE 80W-90 EP gear oil (or full synthetic SAE 75W-90 for temperatures below -15 deg C). First change at 250 hours. Subsequent changes every 1,000-1,500 hours. Oil sampling every 500 hours is mandatory. At this torque class, an external oil cooler with circulation pump is strongly recommended for any application where the duty cycle exceeds 50% of rated power continuously — the oil-bath convection alone may not maintain the temperature below 85 deg C in warm climates or enclosed machinery rooms.

What is the expected overhaul interval for the 416W3 at sustained mining production duty?

Target first overhaul at 20,000-25,000 hours at FEM M6 with full maintenance compliance. The 1,850 kg housing provides substantial thermal mass and structural rigidity that extends component life compared to smaller models at equivalent duty intensity. Brake disc replacement at 8,000-12,000 hours depending on the cycle rate. Seal replacement at 8,000-10,000 hours. Bearing inspection at 15,000 hours. The gear set typically survives to the first overhaul without replacement. Overhaul cost is approximately 35-45% of new unit price. Turnaround time: 6-10 weeks from receipt at the factory.

How does the winch drive compare to a direct-drive electric motor at 200,000 Nm?

A direct-drive (no gearbox) torque motor producing 200,000 Nm would weigh approximately 15,000-25,000 kg and require a custom-wound stator with a diameter exceeding 3 metres — it is not a standard product. The 416W3 at 1,850 kg plus a 500-800 kW standard electric motor at 500-1,000 kg totals 2,350-2,850 kg for the same drum torque. The geared solution is 5-10 times lighter, uses standard catalogue motors, and provides the mechanical brake that direct-drive solutions cannot offer without an external braking system. For all practical purposes, the planetary gearbox is the only viable architecture for 200,000 Nm drum-integrated winch drives.

Main production winder at a 1,200-metre gold mine. 416W3 at ratio 280, dual 750 kW AC motors with VFD. The skip carries 22 tonnes of ore at 350 cycles per day through a shaft where the 1,200-metre rope weighs 7,200 kg. The 1,800 Nm brake at ratio 280 produces 504,000 Nm at the drum — holding the loaded skip plus rope at SF = 2.9 at the deepest point. After 10 months of production duty (approximately 5,400 hours), the brake holding test shows 0.8% degradation from factory — well within the 5% threshold for our next DMR inspection. The previous winder (different supplier, 160,000 Nm class) was showing 4.2% brake degradation at the same service hours. The 416W3 is operating in a different reliability league.

350 t bollard pull AHTS, main anchor handling winch, 416W3 at ratio 200, quad 400 kW electric motors. The vessel completed 14 deep-water anchor deployments in the Gulf of Mexico during the first 8 months of operation — the deepest at 1,800 metres. The 1,800 Nm brake held the 180-tonne chain assembly at 1,800 metres for 6 hours during a weather standby without any drift on the chain counter. Oil temperature peaked at 71 deg C during the heaviest retrieval operation (15 m/min at 85% rated torque for 45 continuous minutes). The external oil cooler maintained stable temperatures throughout. ABS class survey passed without findings.

Semi-submersible drilling rig, 8-point mooring system, one 416W3 per mooring leg at ratio 250. The winches maintain constant mooring tension during drilling operations — each leg carries 80-150 tonnes depending on current and weather conditions. The 416W3 has operated continuously for 7 months with periodic tension adjustments and one full mooring line recovery for inspection. The 4-star is a maintenance observation: the 1,850 kg unit weight means that the annual brake inspection requires the rig crane to lift the drum assembly — a 12-hour operation that occupies the main deck crane and blocks cargo operations for an entire day. If the brake could be inspected through an access port in the drum housing without removing the complete unit, the annual inspection downtime would drop from 12 hours to approximately 3 hours per mooring winch. For an 8-winch rig, this is 72 hours of saved crane time per year.