{"id":1224,"date":"2026-06-29T02:57:49","date_gmt":"2026-06-29T02:57:49","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?p=1224"},"modified":"2026-06-29T02:57:49","modified_gmt":"2026-06-29T02:57:49","slug":"winch-drive-planetary-gearbox-for-anchor-windlass","status":"publish","type":"post","link":"https:\/\/planetary-gearboxes.com\/ja\/winch-drive-planetary-gearbox-for-anchor-windlass\/","title":{"rendered":"Winch Drive Planetary Gearbox for Anchor Windlass"},"content":{"rendered":"
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Winch Drive Series \u2014 Marine & Offshore Equipment<\/p>\n

Winch Drive Planetary Gearbox for Anchor Windlass<\/h1>\n

The anchor windlass is the single most safety-critical powered mechanism on any vessel \u2014 controlling the deployment and retrieval of an anchor chain that may weigh 50 tonnes and reach depths of 100 metres. The winch drive planetary gearbox<\/a> at its heart must deliver massive torque multiplication in a salt-saturated deck environment, hold the chain under full load with zero creep, and restart under the full static load of a hung anchor without hesitation.<\/p>\n

500 \u2013 50,000 Nm output torque<\/span>
\nIP68 marine standard<\/span>
\nRatios to 5,000:1<\/span>
\nIACS \/ DNV \/ ABS ready<\/span><\/div>\n<\/div>\n

<\/p>\n

Every vessel that anchors \u2014 from a 2,000-tonne coastal ferry to a 300,000-tonne VLCC supertanker \u2014 depends on a windlass gearbox engineered for the harshest mechanical environment on earth. The open forecastle deck combines continuous salt spray, structural vibration from hull flexing, and temperature cycles from tropical heat to arctic cold. In this environment, a winch drive planetary gearbox must deliver high reduction ratios \u2014 typically 200:1 to 2,000:1 \u2014 within the compact envelope that anchor windlass designers specify, with a built-in fail-safe holding brake that prevents chain runback under any condition. Korea Ever-Power supplies marine-grade planetary winch drive gearboxes for anchor windlass applications across the full vessel spectrum, with housings, seals, and fasteners engineered for the full 25-year vessel design life without gearbox replacement.<\/p>\n

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Anchor Windlass Applications: From Coastal Craft to VLCC<\/h2>\n

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\"Anchor<\/div>\n

Anchor windlass systems span an enormous range of chain calibres, holding loads, and deployment depths. The winch drive planetary gearbox must be selected against the specific combination of maximum chain pull, chain speed, motor type, and available deck space that each vessel class imposes:<\/p>\n

Coastal and Short-Sea Vessels (500\u20135,000 GT):<\/strong> Ferries, RoRo vessels, coastal bulk carriers, and offshore supply vessels operating in water depths to 80 metres with chain calibres of 28 to 60 mm. Maximum chain pull at the wildcat of 50 to 250 kN. Gearbox output torque requirements of 500 to 5,000 Nm per unit, typically two windlass units per vessel. These vessels anchor frequently \u2014 sometimes multiple times per day on ferry services \u2014 placing high cycle demands on the gearbox holding brake and input shaft seal.<\/p>\n

Medium Ocean-Going Vessels (5,000\u201350,000 GT):<\/strong> General cargo ships, container feeders, bulk carriers, and product tankers anchoring in depths to 150 metres. Chain calibres of 60 to 95 mm, maximum chain pull of 250 to 800 kN. Output torque 5,000 to 18,000 Nm per windlass unit. Classification society rules (IACS Unified Requirements, DNV, ABS) specify the minimum windlass holding power as a function of chain grade and calibre \u2014 the gearbox must hold the specified static chain load with the motor de-energised and the holding brake applied.<\/p>\n

Large Deep-Water Capable Vessels (50,000+ GT):<\/strong> VLCCs, large bulk carriers, and anchor handling tug supply vessels operating in depths to 300 metres or more. Chain calibres of 95 to 162 mm, maximum chain pull of 800 to 3,500 kN at the anchor windlass. Output torque 18,000 to 50,000 Nm per unit. At these torque levels, the planetary architecture is the only practical solution \u2014 the torque density of a multi-stage planetary unit exceeds any parallel-shaft gearbox of equivalent output rating by a factor of 3 to 5 in gearbox envelope volume.<\/p>\n

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Why Planetary Architecture Dominates Anchor Windlass Drive Design<\/h2>\n

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\"Winch<\/div>\n

Anchor windlass designers consistently specify planetary gearboxes over parallel-shaft worm or helical alternatives for four structural reasons that become more pronounced as the required output torque increases:<\/p>\n

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\u2699 Coaxial Compactness<\/h3>\n

The coaxial input-output arrangement allows the motor, gearbox, and wildcat drum to align on a single centreline, minimising forecastle deck footprint. A 3-stage planetary unit producing 20,000 Nm output typically occupies 40 to 60% of the deck area of a parallel-shaft helical unit of equivalent rating.<\/p>\n<\/div>\n

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\ud83d\udcc8 High Single-Train Ratio<\/h3>\n

A two-stage planetary unit achieves ratios of 50:1 to 400:1; a three-stage unit reaches 500:1 to 5,000:1 \u2014 all in one compact housing. This eliminates secondary reduction stages, reducing component count, seal interfaces, and oil leak risk in the marine environment.<\/p>\n<\/div>\n

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\ud83d\udeab Integrated Holding Brake<\/h3>\n

The SAHR multi-disc holding brake integrates directly into the planetary housing as a modular cartridge on the input side of the reduction \u2014 a compact disc pack holds the full output chain load. This eliminates the external brake drum and band brake arrangement that adds deck height and maintenance complexity to older windlass designs.<\/p>\n<\/div>\n

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\u26ed Self-Locking Under Load<\/h3>\n

At gear ratios above approximately 50:1, a planetary gearbox becomes mechanically irreversible \u2014 the output cannot back-drive the input due to friction and inertia of the multiple gear meshes. This self-locking characteristic provides a secondary hold on the anchor chain even if the holding brake fails, preventing runback.<\/p>\n<\/div>\n<\/div>\n

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Korea Ever-Power Winch Drive Range \u2014 Anchor Windlass Selection Guide<\/h2>\n

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\"ZR75<\/p>\n

Korea Ever-Power planetary winch drive gearboxes for anchor windlass cover output torques from 500 Nm (small coastal craft) to 50,000 Nm (VLCC and large bulk carriers). All models are available with SAE or IEC input flanges, SAHR or SAER holding brake, and marine-grade IP67 or IP68 sealing as specified by the windlass designer or classification society surveyor.<\/p>\n

The ZL55 and ZR75 serve smaller vessels with up to 5 stages of reduction and ratios reaching 4,884:1. The 407AW, 414W3, 417W3, and 419W3 cover the medium and heavy ocean-going vessel range, all supplied as standard with IP68 FKM marine sealing, 316L stainless fasteners, and C5-M corrosion protection.<\/p>\n

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\n\n\n\n\n\n\n\n\n\n\n
\u30e2\u30c7\u30eb<\/th>\n\u51fa\u529b\u30c8\u30eb\u30af<\/th>\n\u30b9\u30c6\u30fc\u30b8<\/th>\n\u6bd4\u7387\u7bc4\u56f2<\/th>\nVessel Class<\/th>\n\u5165\u529b\u30d5\u30e9\u30f3\u30b8<\/th>\nSeal Grade<\/th>\n<\/tr>\n<\/thead>\n
ZL55<\/td>\n500 \u2013 2,000 Nm<\/td>\n1\u20135<\/td>\n3.7 \u2013 3,497<\/td>\nCoastal \/ small OSV<\/td>\nSAE \/ IEC<\/td>\nIP67<\/td>\n<\/tr>\n
ZR75<\/td>\n1,500 \u2013 6,000 Nm<\/td>\n2\u20135<\/td>\n5.1 \u2013 4,884<\/td>\nShort-sea \/ ferry<\/td>\nSAE \/ IEC<\/td>\nIP67<\/td>\n<\/tr>\n
407AW<\/td>\n3,000 \u2013 10,000 Nm<\/td>\n2\u20133<\/td>\n50 \u2013 1,200<\/td>\nGeneral cargo \/ bulk<\/td>\nSAE B\/C \/ IEC<\/td>\nIP68 FKM<\/td>\n<\/tr>\n
414W3<\/td>\n8,000 \u2013 22,000 Nm<\/td>\n3<\/td>\n100 \u2013 2,500<\/td>\nOcean-going \/ tanker<\/td>\nSAE C\/D \/ IEC<\/td>\nIP68 FKM<\/td>\n<\/tr>\n
417W3<\/td>\n15,000 \u2013 35,000 Nm<\/td>\n3<\/td>\n100 \u2013 2,500<\/td>\nLarge bulk \/ AHTS<\/td>\nSAE D \/ IEC<\/td>\nIP68 FKM<\/td>\n<\/tr>\n
419W3<\/td>\n25,000 \u2013 50,000 Nm<\/td>\n3\u20134<\/td>\n200 \u2013 5,000<\/td>\nVLCC \/ large vessel<\/td>\nSAE D \/ IEC<\/td>\nIP68 FKM<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

Marine-Grade Engineering: Beyond Standard Industrial Specifications<\/h2>\n

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\"Winch<\/div>\n

The forecastle deck environment subjects the anchor windlass gearbox to corrosion attack fundamentally different from inland industrial applications. Korea Ever-Power marine-grade winch drive gearboxes incorporate engineering responses to each specific attack mode:<\/p>\n

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\ud83c\udf0a<\/span><\/p>\n

IP68 Immersion Sealing<\/h3>\n<\/div>\n

Forecastle deck gearboxes experience sustained submersion during heavy weather when breaking seas sweep the deck. Korea Ever-Power marine-duty units are rated IP68 at 1.5 metres sustained depth, using FKM floating face seals on the output shaft and PTFE-lip radial seals on the input shaft, with O-ring face seal housing joints replacing standard gaskets.<\/p>\n<\/div>\n

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\u26c7<\/span><\/p>\n

C5-M Corrosion Protection<\/h3>\n<\/div>\n

All external surfaces receive a three-coat system: zinc-rich epoxy primer (60 microns DFT minimum), epoxy barrier mid-coat (80 microns), and polyurethane topcoat (60 microns) \u2014 rated to ISO 12944 C5-M (marine, high corrosivity). All external fasteners are A4-316L stainless steel with stainless threaded inserts in tapped housing bores.<\/p>\n<\/div>\n

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\ud83d\udd50<\/span><\/p>\n

Wide Temperature Range<\/h3>\n<\/div>\n

Units are filled as standard with fully synthetic ISO VG 220 gear oil with pour point below -45\u00b0C, maintaining adequate viscosity from cold-start at -40\u00b0C through sustained operation at +80\u00b0C in tropical conditions. Standard mineral gear oils are not approved for marine winch drive applications in Korea Ever-Power supply.<\/p>\n<\/div>\n

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\ud83d\udd0c<\/span><\/p>\n

Marine Breather System<\/h3>\n<\/div>\n

A sealed, labyrinth-type breather-desiccant assembly rated IP66 is positioned at the highest housing point, plumbed away from the deck wash zone, allowing pressure equalisation while trapping moisture and particulate that would otherwise corrode gear and bearing surfaces internally. The desiccant cartridge is replaceable at annual dry-dock service without gearbox disassembly.<\/p>\n<\/div>\n<\/div>\n

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Integrated Holding Brake: Classification Society Compliance and Fail-Safe Design<\/h2>\n

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\"414W3<\/p>\n

IACS Unified Requirement W1 and W22, together with DNV Rules for Ships Part 4 Chapter 4 and ABS Rules for Steel Vessels Part 4, all impose explicit requirements on anchor windlass holding power \u2014 the windlass, with the motor de-energised and relying only on the mechanical holding brake, must hold a specified static chain tension without chain movement. This is the foundation of the holding brake specification for every anchor windlass gearbox Korea Ever-Power supplies.<\/p>\n

Spring-Applied, Hydraulically-Released (SAHR) Brake:<\/strong> The standard for hydraulic-motor-driven windlasses. The brake is engaged by compressed springs whenever hydraulic pressure is absent \u2014 ensuring the chain is held whenever the hydraulic power unit shuts down or loses pressure. Spring force is calculated to hold the classification society specified chain tension at the brake disc diameter used, with a 1.5 safety factor on required holding torque. Only an active hydraulic signal releases the brake for anchor lowering or retrieval.<\/p>\n

Spring-Applied, Electrically-Released (SAER) Brake:<\/strong> Used with electric-motor-driven windlasses. The SAER operates on the same fail-safe principle \u2014 springs apply, electromagnet releases \u2014 using a 24V or 48V DC electromagnet energised from the vessel control system as the release mechanism. The SAER module integrates into the same gearbox housing position as the SAHR variant, enabling the same gearbox output stage to serve both electric and hydraulic motor configurations by changing only the input brake module.<\/p>\n

Manual Override Provision:<\/strong> Classification society rules require that the windlass can be operated manually in the event of total power failure. Korea Ever-Power winch drive gearboxes for anchor windlass applications are available with a manual override shaft provision on the input face, allowing a manual ratchet handle to engage the sun gear directly and operate the windlass at reduced speed during emergency recovery.<\/p>\n

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Motor Integration: Hydraulic, Electric, and Dual-Drive Configurations<\/h2>\n

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\"407AW<\/p>\n

Anchor windlass drives use three motor technologies depending on vessel type and age. The winch drive planetary gearbox must interface correctly with each:<\/p>\n

Hydraulic Motor (most common on commercial vessels):<\/strong> Variable-displacement hydraulic motors are the dominant drive for commercial vessel anchor windlasses because they provide inherent overload protection \u2014 the hydraulic relief valve limits chain pull to the system pressure setting regardless of operator action. The motor mounts to the gearbox via SAE two-bolt or four-bolt flange (SAE A, B, or C depending on motor displacement). Korea Ever-Power winch drive gearboxes for hydraulic motor input include a case drain isolation feature preventing cross-contamination of hydraulic and gear oil circuits at the motor interface.<\/p>\n

AC Electric Motor (growing on LNG carriers, cruise vessels):<\/strong> Electric windlass drives use IE3 or IE4 three-phase AC motors controlled by a dedicated VFD, enabling precise chain speed control for delicate manoeuvring in crowded anchorages. IEC B5 flange mounting in frames IEC 132 to IEC 250 covers the power range for most electric windlass applications. Korea Ever-Power WD gearboxes for electric motor input include pre-machined IEC B5 input flanges and integrated speed sensor provisions for chain speed feedback to the VFD controller.<\/p>\n

Dual-Drive (Electric and Hydraulic):<\/strong> Some vessel designs specify dual-drive windlasses \u2014 an electric motor for normal operations with a hydraulic motor as backup, both capable of driving the same gearbox input shaft. Korea Ever-Power supplies dual-input planetary gearboxes with two input flanges on opposing faces of the input housing, with a selector mechanism preventing simultaneous engagement. This configuration satisfies flag state redundancy requirements for anchor equipment on passenger vessels and DP-rated offshore support vessels.<\/p>\n

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Testing, Certification, and Classification Society Approval<\/h2>\n

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\"Korea<\/div>\n

Every Korea Ever-Power winch drive gearbox supplied for anchor windlass applications undergoes a multi-stage testing protocol before shipment. Classification society surveyors may witness any stage upon request, and full test records ship with every unit:<\/p>\n

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\u2460 No-Load Run-In<\/p>\n

60-minute no-load rotation at rated input speed in both directions. Oil temperature, noise level, and vibration recorded. Abnormal heat or noise terminates the test for investigation.<\/p>\n<\/div>\n

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\u2461 100% Rated Torque Load Test<\/p>\n

30-minute loaded operation at rated output torque. Oil temperature must stabilise within specification limits. Gear mesh noise within specified dB(A) limit at 1 metre. All seal interfaces checked for oil seepage.<\/p>\n<\/div>\n

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\u2462 Brake Holding Test<\/p>\n

Static hold at 1.5x rated output torque with brake engaged and motor de-energised. Zero output shaft movement over 10-minute hold period. Brake disc temperature recorded before and after.<\/p>\n<\/div>\n

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\u2463 IP68 Immersion Test<\/p>\n

Complete gearbox submerged to 1.5 metres for 60 minutes. Post-immersion inspection for water ingress at all seal interfaces. Conducted on sample basis per production batch for all IP68-rated units.<\/p>\n<\/div>\n

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\u2464 Cold-Start Test<\/p>\n

For arctic-rated units: gearbox cooled to -35\u00b0C and operated at 50% rated torque within 30 seconds of start. Required for vessels trading in IACS Polar Code environmental categories.<\/p>\n<\/div>\n<\/div>\n

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Manufacturing Quality: In-House Gear Cutting, Hardening, and Grinding<\/h2>\n

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\"Korea<\/div>\n

<\/p>\n

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\"Planetary<\/p>\n

The reliability of a marine winch drive gearbox across a 25-year vessel life depends on the manufacturing process quality of its internal components. Korea Ever-Power maintains all critical gear manufacturing processes in-house:<\/p>\n

Gear Material and Heat Treatment:<\/strong> Sun gears, planet gears, and ring gears are manufactured from case-hardening alloy steel (20CrMnTi or 20CrNiMo depending on torque class), carburised to a case depth of 0.8 to 1.5 mm and quench-hardened to 58 to 62 HRC surface hardness with a tough, ductile core. The compressive residual stress introduced by carburising and quenching significantly extends the surface fatigue life of gear teeth under the cyclic loading of anchor retrieval operations.<\/p>\n

Gear Grinding to DIN 5 Tolerance:<\/strong> All marine winch drive gears are finish-ground to DIN 5 tooth profile and lead tolerance after heat treatment, correcting the distortion introduced by carburising and quenching. DIN 5 accuracy reduces gear mesh noise \u2014 important for passenger vessel windlass applications where bridge noise is regulated \u2014 and ensures consistent load distribution across the full tooth face width, preventing the edge loading that initiates pitting and spalling at tooth ends.<\/p>\n

Planet Carrier Precision Machining:<\/strong> Planet carriers are machined on 5-axis CNC machining centres and measured on coordinate measuring machines to verify planet pin position to within \u00b10.01 mm of the theoretical position \u2014 ensuring equal load sharing between all three or four planets. Unequal load sharing concentrates the total torque on one or two planets, reducing the effective gearbox capacity to a fraction of its rated value.<\/p>\n

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Common Anchor Windlass Gearbox Failures and Prevention<\/h2>\n

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\n\n\n\n\n\n\n\n\n\n
Failure Mode<\/th>\nRoot Cause<\/th>\nDetection<\/th>\nPrevention<\/th>\n<\/tr>\n<\/thead>\n
Water ingress \u2014 gear corrosion<\/td>\nDegraded output shaft seal or inadequate breather allowing moisture entry during thermal cycling<\/td>\nRust-coloured oil at drain; elevated water content in oil analysis at dry-dock<\/td>\nAnnual seal inspection and breather desiccant replacement; oil analysis at each dry-dock interval<\/td>\n<\/tr>\n
Brake disc glazing<\/td>\nRepeated partial brake releases under load \u2014 chain slipping slightly at each anchoring cycle<\/td>\nReduced brake holding torque at periodic holding test; glazed disc surface at inspection<\/td>\nAvoid partial releases under load; replace disc pack at each dry-dock regardless of apparent condition<\/td>\n<\/tr>\n
Planet bearing pitting<\/td>\nOverload during high-energy anchor retrieval \u2014 shock torque exceeds bearing Hertz stress limit<\/td>\nMetallic particles in oil; vibration increase at specific rotation speeds<\/td>\nFit hydraulic relief valve at correct pressure; annual oil analysis to trend bearing wear metals<\/td>\n<\/tr>\n
Sun gear tooth fracture<\/td>\nChain snatch load \u2014 anchor catching on seabed generates momentary torque spike 4 to 5 times rated<\/td>\nSudden loss of drive; large metallic fragments at drain plug magnetic core<\/td>\nFit torque-limiting coupling between motor and gearbox; limit chain speed near seabed during retrieval<\/td>\n<\/tr>\n
Fastener corrosion seizure<\/td>\nZinc-plated steel fasteners corroding in marine environment \u2014 impossible to remove without damage<\/td>\nRust weeping from fastener heads; fasteners impossible to loosen at service interval<\/td>\nSpecify A4-316L stainless fasteners and stainless threaded inserts \u2014 never use zinc-plated hardware on forecastle deck equipment<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Why Windlass Manufacturers and Vessel Operators Choose Korea Ever-Power<\/h2>\n
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IP68<\/p>\n

Sustained immersion standard on all marine-grade units \u2014 exceeding IP67 minimum for forecastle deck equipment<\/p>\n<\/div>\n

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DIN 5<\/p>\n

Gear grinding accuracy on all marine winch drive sun, planet, and ring gears \u2014 lower noise, equal planet load sharing<\/p>\n<\/div>\n

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25 yr<\/p>\n

Design-life bearing sizing \u2014 L10h calculated at IACS W1\/W22 holding load case, not generic industrial assumptions<\/p>\n<\/div>\n

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IACS<\/p>\n

Full test records and material traceability \u2014 DNV, ABS, BV, Lloyd Register surveyor witness testing on request<\/p>\n<\/div>\n<\/div>\n

Korea Ever-Power application engineers provide free load case analysis and gearbox sizing for all new vessel and retrofit windlass projects \u2014 send us your chain calibre, maximum chain pull, motor type, and wildcat drum diameter to receive a holding brake torque calculation and preliminary gearbox selection within 24 hours.<\/p>\n

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\"Korea<\/div>\n<\/div>\n

<\/p>\n

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Source Your Anchor Windlass Winch Drive Gearbox<\/h2>\n

Whether you are designing a new anchor windlass for a vessel under construction, sourcing a replacement gearbox for a vessel in service, or upgrading an existing windlass to meet current classification society holding requirements \u2014 Korea Ever-Power delivers marine-grade, classification-ready winch drive planetary gearboxes from stock and to custom specification. Send us your chain calibre, maximum chain pull, motor type, and wildcat drum diameter for a free application review, holding brake sizing, and dimensional drawing within 48 hours.<\/p>\n

\ud83d\udcd1 View Winch Drive Range<\/a>
\n\ud83d\udcde Request Application Review<\/a><\/div>\n<\/div>\n

Edit by Cxm<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Winch Drive Series \u2014 Marine & Offshore Equipment Winch Drive Planetary Gearbox for Anchor Windlass The anchor windlass is the single most safety-critical powered mechanism on any vessel \u2014 controlling the deployment and retrieval of an anchor chain that may weigh 50 tonnes and reach depths of 100 metres. The winch drive planetary gearbox at its heart must deliver massive torque multiplication in a salt-saturated deck environment, hold the chain under full load with zero creep, and restart under the full static load of a hung anchor without hesitation. 500 \u2013 50,000 Nm output torque IP68 marine standard Ratios to 5,000:1 IACS \/ DNV \/ ABS ready Every vessel that […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[965],"tags":[],"class_list":["post-1224","post","type-post","status-publish","format-standard","hentry","category-application-and-technical-guid"],"_links":{"self":[{"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/posts\/1224","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/comments?post=1224"}],"version-history":[{"count":2,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/posts\/1224\/revisions"}],"predecessor-version":[{"id":1226,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/posts\/1224\/revisions\/1226"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/media?parent=1224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/categories?post=1224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/tags?post=1224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}