{"id":1294,"date":"2026-06-30T05:19:01","date_gmt":"2026-06-30T05:19:01","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?p=1294"},"modified":"2026-06-30T05:19:01","modified_gmt":"2026-06-30T05:19:01","slug":"winch-drive-planetary-gearbox-for-truck-mounted-crane","status":"publish","type":"post","link":"https:\/\/planetary-gearboxes.com\/bg\/winch-drive-planetary-gearbox-for-truck-mounted-crane\/","title":{"rendered":"Winch Drive Planetary Gearbox for Truck-Mounted Crane"},"content":{"rendered":"
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Winch Drive Series \u2014 Mobile Crane & Construction Lifting Equipment<\/p>\n

Winch Drive Planetary Gearbox for Truck-Mounted Crane<\/h1>\n

Truck-mounted cranes \u2014 from 25-tonne city cranes to 1,000-tonne all-terrain behemoths \u2014 share a common mechanical challenge: the main and auxiliary hoist winch gearboxes must fit within the boom head and the crane superstructure while delivering the high reduction ratios and fail-safe holding brakes required by EN 13000 and ASME B30.5 crane safety standards. The \u043f\u043b\u0430\u043d\u0435\u0442\u0430\u0440\u043d\u0430 \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u043d\u0430 \u043a\u0443\u0442\u0438\u044f \u0441 \u043b\u0435\u0431\u0435\u0434\u043a\u0430<\/a> must handle the shock loads of dynamic lifts, the sustained loads of long picks, and the rapid duty cycles of construction crane work \u2014 all in an outdoor environment from arctic to tropical.<\/p>\n

2,000 \u2013 50,000 Nm output torque<\/span>
\nEN 13000 \/ ASME B30.5 compliant<\/span>
\nDual SAHR brake for man-riding<\/span>
\n-40\u00b0C to +55\u00b0C operating range<\/span><\/div>\n<\/div>\n

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Truck-mounted and all-terrain mobile cranes are among the most versatile and widely used lifting machines in construction, industrial plant maintenance, and infrastructure work. From a 25-tonne rough terrain crane erecting precast concrete panels on a housing site to a 1,000-tonne all-terrain crane assembling offshore wind turbine nacelles, the hoist winch drive gearbox is the component that translates engine or electric power into controlled, precise wire rope motion \u2014 and in doing so must meet the crane safety standards that classify these machines as life-safety equipment. Korea Ever-Power supplies planetary winch drive gearboxes for truck-mounted crane applications covering the full capacity range, with EN 13000 and ASME B30.5 design compliance, dual independent brake capability, and the wide temperature range and outdoor environmental resistance that construction site deployment demands across every climate zone.<\/p>\n

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Mobile Crane Hoist Applications: Rough Terrain to All-Terrain<\/h2>\n

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\"Truck-mounted<\/div>\n

Rough Terrain Cranes \u2014 25 to 120 Tonne (2,000\u201312,000 Nm):<\/strong> Rubber-tyred cranes designed for off-road travel and short-radius lifting on construction sites. Single-drum main hoist with maximum line pull of 40 to 120 kN at minimum drum layer. These machines work in intermittent duty \u2014 multiple short picks per hour during structural steel or precast erection \u2014 with the hoist drum accumulating 200 to 400 complete cycles per day. The gearbox operates in the outdoor construction environment with dust, cement slurry, and temperature variation from pre-dawn cold to afternoon heat. EN 13000 requires the crane design to prevent uncontrolled load descent under all failure conditions \u2014 the gearbox SAHR brake must hold the rated single-line pull statically with the motor de-energised and must re-engage within the time specified by the crane control system on operator release of the hoist lever.<\/p>\n

All-Terrain Cranes \u2014 100 to 500 Tonne (8,000\u201335,000 Nm):<\/strong> Multi-axle highway-capable cranes that combine road travel performance with off-road capability. Two or three hoist drums \u2014 main hoist, auxiliary hoist, and (on larger units) a separate luffing winch for the fly jib \u2014 each with independent gearbox and motor. Main hoist maximum line pull of 100 to 350 kN. These cranes perform complex lifts \u2014 tandem lifts with multiple cranes, picks with long booms at maximum radius, and critical infrastructure lifts that may take 6 to 12 hours \u2014 requiring the hoist gearbox to hold sustained loads at rated capacity for extended periods while the rigging crew works the load into position.<\/p>\n

Crawler Crane Conversions and Large Capacity Units \u2014 200 to 1,000 Tonne (15,000\u201350,000 Nm):<\/strong> The largest truck-mounted and self-propelled wheeled cranes approach the capacity of small crawler cranes and are used for heavy industrial lifting \u2014 plant and pressure vessel installation, offshore load-out operations, and modular construction. Main hoist maximum line pull up to 500 kN. The gearbox torque requirement at this capacity level demands three or four planetary stages with output torques up to 50,000 Nm. At these sizes, the gearbox weight and envelope become critical constraints \u2014 the hoist gearbox must be transportable as part of the crane within the standard transport permit weights and widths, placing a premium on the torque density advantage of the planetary architecture over parallel-shaft alternatives.<\/p>\n

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EN 13000 and ASME B30.5: Crane Hoist Gearbox Safety Requirements<\/h2>\n

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\"Winch<\/div>\n
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\ud83d\udeab<\/span><\/p>\n

Brake Design Factor \u2014 EN 13000<\/h3>\n<\/div>\n

EN 13000 Clause 5.3.3 requires that the hoist brake be capable of holding 1.5 times the maximum rated line pull statically with the motor de-energised. This 1.5 times factor accounts for dynamic load amplification during sudden stop and the possibility of load distribution variation in multi-part reeving systems. Korea Ever-Power mobile crane hoist gearbox SAHR brakes are sized to hold 1.5 times maximum rated line pull at the brake disc diameter, with the spring force selected to maintain this holding torque across the full spring working life of 200,000 engagement cycles \u2014 the crane inspection interval used by most major rental fleets.<\/p>\n<\/div>\n

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Load Holding Under Power Failure<\/h3>\n<\/div>\n

ASME B30.5 Section 5-1.9.2 requires that the hoist brake automatically engage and hold the load whenever the operator releases the hoist control, whenever control power is lost, and whenever the crane engine or electric drive shuts down. The SAHR brake in Korea Ever-Power mobile crane gearboxes satisfies this requirement through the spring-applied design \u2014 the brake is always engaged unless an active hydraulic or electrical signal holds it open. Any power loss immediately releases the brake control signal and the springs close the brake within the specified response time.<\/p>\n<\/div>\n

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\ud83d\udcc8<\/span><\/p>\n

Design Factor 2.0 on Structural Components<\/h3>\n<\/div>\n

EN 13000 specifies a minimum design factor of 2.0 on the yield strength of structural components (gears, shafts, carriers) at the rated working load. Korea Ever-Power truck crane hoist gearboxes verify this design factor through FEA of each critical component at the maximum rated single-line pull, with the calculated maximum stress compared to the 0.2% proof stress of the material (not ultimate tensile strength) \u2014 a more conservative basis that provides additional margin for the dynamic load variations that real crane lifts generate.<\/p>\n<\/div>\n

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\ud83d\udd27<\/span><\/p>\n

Duty Classification M3 to M5<\/h3>\n<\/div>\n

ISO 4301 defines crane duty classifications from M1 (light, infrequent) to M8 (heavy, continuous). Truck-mounted cranes in construction and industrial service typically fall in classifications M3 to M5, depending on the lifting frequency and average load ratio. Korea Ever-Power truck crane gearbox gear tooth fatigue life calculations are performed at the M4 duty classification as the standard specification, with M5 available for cranes used in high-frequency rental service. The gear fatigue life at M4 corresponds to approximately 3.2 million load cycles over the crane design life of 10 to 20 years.<\/p>\n<\/div>\n<\/div>\n

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Korea Ever-Power Mobile Crane Hoist Drive Selection Guide<\/h2>\n

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\"ZR75<\/p>\n

Korea Ever-Power planetary winch drive gearboxes for truck-mounted crane applications cover the full capacity range from small rough terrain cranes through the largest all-terrain units. All crane hoist gearboxes are supplied with EN 13000 and ASME B30.5 design factor 2.0 verification, SAHR brake sized to 1.5 times rated line pull, M4 duty classification gear fatigue life calculation, and IP67 outdoor sealing as the baseline specification.<\/p>\n

For cranes used in personnel lifting (man-basket operations), the dual SAHR brake configuration \u2014 primary on input shaft, secondary on output shaft \u2014 is mandatory under EN 13000 Annex E and is available as a standard product configuration on all Korea Ever-Power crane hoist gearboxes above 407AW size.<\/p>\n

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\n\n\n\n\n\n\n\n\n\n
\u041c\u043e\u0434\u0435\u043b<\/th>\n\u0418\u0437\u0445\u043e\u0434\u0435\u043d \u0432\u044a\u0440\u0442\u044f\u0449 \u043c\u043e\u043c\u0435\u043d\u0442<\/th>\n\u0415\u0442\u0430\u043f\u0438<\/th>\n\u0414\u0438\u0430\u043f\u0430\u0437\u043e\u043d \u043d\u0430 \u0441\u044a\u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u0435\u0442\u043e<\/th>\nCrane Application<\/th>\nDuty Class<\/th>\nBrake Config<\/th>\n<\/tr>\n<\/thead>\n
ZR75<\/td>\n1,500 \u2013 6,000 Nm<\/td>\n2\u20135<\/td>\n5.1 \u2013 4,884<\/td>\nRT crane 25\u201350 t, auxiliary hoist<\/td>\nM3\u2013M4<\/td>\nSingle SAHR<\/td>\n<\/tr>\n
407AW<\/td>\n3,000 \u2013 10,000 Nm<\/td>\n2\u20133<\/td>\n50 \u2013 1,200<\/td>\nAT crane 100 t main hoist<\/td>\nM4<\/td>\nSingle \/ Dual SAHR<\/td>\n<\/tr>\n
414W3<\/td>\n8,000 \u2013 22,000 Nm<\/td>\n3<\/td>\n100 \u2013 2,500<\/td>\nAT crane 200\u2013300 t main hoist<\/td>\nM4\u2013M5<\/td>\nDual SAHR<\/td>\n<\/tr>\n
417W3<\/td>\n15,000 \u2013 35,000 Nm<\/td>\n3<\/td>\n100 \u2013 2,500<\/td>\nAT crane 400\u2013600 t main hoist<\/td>\nM4\u2013M5<\/td>\nDual SAHR<\/td>\n<\/tr>\n
419W3<\/td>\n25 000 \u2013 50 000 \u041d\u043c<\/td>\n3\u20134<\/td>\n200 \u2013 5,000<\/td>\nAT crane 600\u20131,000 t main hoist<\/td>\nM4\u2013M5<\/td>\nDual SAHR<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Dynamic Lifting: Load Spectrum, Dynamic Factor, and Gearbox Fatigue Life<\/h2>\n

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\"417W3<\/p>\n

Mobile crane lifts are classified as dynamic operations \u2014 the gear teeth in the hoist gearbox experience both the static load from the suspended weight and the dynamic amplification from load pickup, deceleration stops, and boom head movement. EN 13000 defines dynamic factors (\u03c6) that amplify the static load for fatigue calculation purposes: \u03c6\u2082 for steady hoisting, \u03c6\u2083 for load pickup, and \u03c6\u2084 for sudden release. Korea Ever-Power truck crane gearbox fatigue life calculations apply these dynamic factors to the full operating load spectrum rather than calculating fatigue at static rated load only.<\/p>\n

Load Spectrum Approach:<\/strong> A construction crane does not lift its maximum rated load on every cycle \u2014 most lifts are at 40 to 70% of the rated capacity. ISO 4301 classifies the load spectrum into five groups (Q0 to Q4) based on the relative frequency of maximum load lifts. Korea Ever-Power applies the Q2 load spectrum (medium use \u2014 most lifts below 50% rated load, with occasional maximum load cycles) as the standard specification for construction crane gearboxes, consistent with the M4 duty classification.<\/p>\n

Gear Tooth Fatigue at M4\/Q2:<\/strong> Applying the EN 13000 dynamic factors and the ISO 4301 Q2 load spectrum to the Korea Ever-Power gear tooth bending fatigue S-N curve for 20CrNiMo case-hardened and shot-peened gears produces a gear tooth fatigue life of 3.2 million load cycles at M4\/Q2 specification. At 300 lift cycles per day and 250 operating days per year, this corresponds to 4.3 years of service \u2014 well within the planned maintenance inspection interval for most crane operators, who inspect and recertify hoist gearboxes at 5-year intervals as part of the crane certification cycle.<\/p>\n

Shock Load at Load Pickup:<\/strong> The most damaging event in a crane hoist cycle is load pickup \u2014 when the crane hooks a previously-grounded load and takes the weight rapidly as the hoist line comes taut. The resulting load shock can reach 1.6 to 2.2 times the static load weight (dynamic factor \u03c6\u2083 per EN 13000). Korea Ever-Power truck crane gearboxes are rated for a shock factor of 2.5 times rated output torque for pulse durations up to 150 milliseconds \u2014 above the maximum EN 13000 \u03c6\u2083 factor \u2014 providing additional margin for the occasional severe shock that occurs when a load is picked from a difficult-access position.<\/p>\n

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Hydraulic and Electric Drive Integration for Mobile Crane Hoists<\/h2>\n

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\"Winch<\/div>\n

Hydraulic Drive (Standard for Diesel-Powered Mobile Cranes):<\/strong> The vast majority of truck-mounted and all-terrain cranes use hydraulic hoist drives \u2014 the crane engine drives a variable-displacement pump that feeds piston motors on the hoist winch gearbox input. Variable-displacement motor control provides proportional speed control from creep to full hoisting speed. Load-sensing circuits maintain the motor pressure proportional to the load, providing inherent overload protection and smooth speed control across the full load range. Korea Ever-Power crane hoist gearboxes are available with SAE B, C, and D flange inputs for all hydraulic motor sizes used in the mobile crane market, with case drain isolation as standard to prevent cross-contamination of hydraulic and gear oil circuits.<\/p>\n

Electric Drive (Growing on Hybrid and Electric Cranes):<\/strong> Hybrid and fully electric mobile cranes \u2014 driven by battery packs or grid connection at urban construction sites \u2014 use electric hoist motors rather than hydraulic. The electric drive eliminates hydraulic oil fire risk on critical lifts and provides precise speed control at all load levels. Korea Ever-Power crane gearboxes for electric drive cranes include IEC B5 flanges in frames IEC 160 to IEC 315 for the high-torque servo and induction motors used in crane hoist service, with regenerative braking compatibility \u2014 the gearbox transmits equal torque in hoisting and lowering directions without de-rating, enabling energy recovery during lowering of heavy loads.<\/p>\n

Free-Fall Hoist Provision:<\/strong> Some crane operations \u2014 particularly clamshell bucket earthmoving and demolition work \u2014 require free-fall hoisting, where the drum is released to spin freely under gravity rather than being driven by the motor. Free-fall operation requires the gearbox to disconnect from the motor while the drum rotates freely, then re-engage smoothly as the brake is applied and the motor reconnects. Korea Ever-Power crane hoist gearboxes for free-fall operation include a wet clutch disengagement provision on the input side of the first planetary stage, enabling smooth free-fall engagement and controlled re-engagement as specified by the crane control system.<\/p>\n

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Testing, Certification, and Crane Manufacturer Approval<\/h2>\n

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\"Korea<\/div>\n

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\"Planetary<\/p>\n

Korea Ever-Power crane hoist gearboxes undergo a factory acceptance test that satisfies the crane manufacturer quality assurance requirements and supports the crane certification documentation submitted to TUV, Lloyd Register, Bureau Veritas, or the applicable national crane inspection authority:<\/p>\n

Rated Load Test at EN 13000 Dynamic Factor:<\/strong> The gearbox is loaded to 1.25 times rated output torque \u2014 equivalent to the EN 13000 \u03c6\u2083 dynamic load factor applied to the maximum rated line pull \u2014 and held for 30 minutes. No permanent deformation, seal leakage, or noise change is permitted. This test replicates the most severe dynamic load the gearbox will experience during normal crane operation.<\/p>\n

Brake Holding Test at 1.5x Rated:<\/strong> Both primary and secondary SAHR brakes (where fitted) are tested independently at 1.5 times rated output torque. Each brake holds the test load for 15 minutes with motor de-energised. Zero drum movement and disc temperature below 200\u00b0C are required.<\/p>\n

Shock Load Test:<\/strong> Twenty impulse applications of 2.5 times rated torque via flywheel release, simulating load pickup shock events. MPI inspection of gear teeth and carrier arms after the shock test sequence. Any indication of surface crack initiation at the tooth root fails the test.<\/p>\n

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Common Mobile Crane Hoist 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
Brake spring fatigue \u2014 holding failure<\/td>\nHigh-cycle brake use in rental fleet service \u2014 spring preload loss after 200,000 engagement cycles without inspection<\/td>\nLoad movement under static hold with motor de-energised; brake holding test failure at annual crane inspection<\/td>\nReplace spring pack at 200,000 cycles or 5-year interval; annual brake holding test at 1.5x rated load<\/td>\n<\/tr>\n
Gear tooth fatigue \u2014 overloaded picks<\/td>\nRepeated operation above rated line pull \u2014 overloaded hooks or suspended load heavier than documented<\/td>\nGear noise increase after campaign of heavy lifts; micro-pitting visible at tooth flank on annual inspection<\/td>\nFit rated load limiter on crane control system; enforce slinging weight recording before any lift<\/td>\n<\/tr>\n
Water ingress \u2014 outdoor storage<\/td>\nThermal cycling during outdoor overnight storage drawing moisture through breather \u2014 condensation corrosion on gear and bearing surfaces<\/td>\nRust-stained oil at drain plug; elevated iron in annual oil sample<\/td>\nFit marine-grade desiccant breather; annual oil change and gear surface inspection at crane recertification<\/td>\n<\/tr>\n
Planet bearing seizure \u2014 cold start<\/td>\nMineral oil at -30\u00b0C too viscous to circulate to planet bearings within first 2 minutes of morning operation<\/td>\nBearing noise after winter campaigns; metallic debris at drain plug inspection<\/td>\nSpecify PAO synthetic oil pour point below -45\u00b0C for cranes operating below -20\u00b0C; 3-minute no-load warm-up before first lift<\/td>\n<\/tr>\n
Housing paint corrosion \u2014 coastal sites<\/td>\nStandard industrial paint without marine-grade zinc primer \u2014 substrate corrosion progressing to housing wall thinning at bolt bosses<\/td>\nVisible rust at housing ribs; bolt boss corrosion reducing thread engagement depth at inspection<\/td>\nSpecify C5-M three-coat paint system for cranes used within 10 km of coast; annual touch-up of any paint damage before rust initiation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Why Mobile Crane Manufacturers and Rental Fleets Choose Korea Ever-Power<\/h2>\n

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\"Korea<\/div>\n

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\"Korea<\/p>\n
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2.0x<\/p>\n

Design factor on structural components \u2014 FEA-verified at EN 13000 and ASME B30.5 rated working load, accepted by all major crane certification bodies<\/p>\n<\/div>\n

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1.5x<\/p>\n

Brake holding factor \u2014 SAHR brake sized to 1.5 times maximum rated line pull per EN 13000 Clause 5.3.3, verified at factory acceptance test<\/p>\n<\/div>\n

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M4\/Q2<\/p>\n

ISO 4301 duty class and load spectrum for standard construction crane application \u2014 gear tooth fatigue life of 3.2 million cycles, with M5 available for rental fleet service<\/p>\n<\/div>\n

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2.5x<\/p>\n

Shock load rating for load pickup events \u2014 above the maximum EN 13000 \u03c6\u2083 dynamic factor, providing margin for difficult-access and tandem lift operations<\/p>\n<\/div>\n<\/div>\n

Korea Ever-Power crane hoist gearbox proposals include EN 13000 and ASME B30.5 compliance summaries, gear tooth fatigue life calculations at the specified duty classification, brake holding torque verification, and dimensional drawings for integration into the crane superstructure design. Contact us with your crane rated capacity, maximum line pull, duty classification, and motor specification for a free compliance review and gearbox sizing proposal within 48 hours.<\/p>\n

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Source Your Truck-Mounted Crane Winch Drive Planetary Gearbox<\/h2>\n

Whether you are specifying hoist gearboxes for a new crane build programme, sourcing replacement units for a rental fleet recertification, or upgrading existing crane hoists to current EN 13000 or ASME B30.5 requirements \u2014 Korea Ever-Power delivers design-factor-verified, EN-compliant planetary winch drive gearboxes with the crane manufacturer documentation package. Send us your rated capacity, maximum line pull, duty classification, and drive type for a free EN 13000 compliance review and gearbox proposal 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 Mobile Crane & Construction Lifting Equipment Winch Drive Planetary Gearbox for Truck-Mounted Crane Truck-mounted cranes \u2014 from 25-tonne city cranes to 1,000-tonne all-terrain behemoths \u2014 share a common mechanical challenge: the main and auxiliary hoist winch gearboxes must fit within the boom head and the crane superstructure while delivering the high […]<\/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-1294","post","type-post","status-publish","format-standard","hentry","category-application-and-technical-guid"],"_links":{"self":[{"href":"https:\/\/planetary-gearboxes.com\/bg\/wp-json\/wp\/v2\/posts\/1294","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/bg\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/bg\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/bg\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/bg\/wp-json\/wp\/v2\/comments?post=1294"}],"version-history":[{"count":2,"href":"https:\/\/planetary-gearboxes.com\/bg\/wp-json\/wp\/v2\/posts\/1294\/revisions"}],"predecessor-version":[{"id":1298,"href":"https:\/\/planetary-gearboxes.com\/bg\/wp-json\/wp\/v2\/posts\/1294\/revisions\/1298"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/bg\/wp-json\/wp\/v2\/media?parent=1294"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/bg\/wp-json\/wp\/v2\/categories?post=1294"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/bg\/wp-json\/wp\/v2\/tags?post=1294"}],"curies":[{"name":"\u0440\u0430\u0431\u043e\u0442\u043d\u0430 \u0441\u0440\u0435\u0449\u0430","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}