Which ship-to-shore crane gearbox fits hoist, trolley, gantry, or boom drive?

Port Infrastructure · Container Terminal Equipment

Ship-to-Shore Crane Gearbox: Drive Systems for the World’s Most Productive Container Handling Equipment

The ship-to-shore crane gearbox (STS crane gearbox) operates in a continuous production environment where a single drive failure stops container throughput for an entire berth — typically $50,000–$200,000 per hour in vessel and terminal revenue. The specification requirements for each of the four STS drive positions reflect this consequence: they are the most precisely documented, most stringently tested planetary gearbox applications in the port equipment sector.

A ship-to-shore gantry crane has four independent drive systems, each using planetary gearboxes: the hoist drive (lifts containers between ship and quay), the trolley drive (moves the spreader along the crane girder), the gantry travel drive (moves the entire crane along the quay rail), and the boom hoist drive (raises and lowers the landside boom for maintenance and vessel clearance). Each drive position has a different operating duty cycle, torque class, and failure consequence.

HOIST
60–150 t
SWL range
200,000–500,000 Nm
Output torque

Hoist Drive — The Safety-Critical Position

The container crane hoist gearbox is the highest-consequence drive on the STS crane. It lifts containers weighing 20–65 tonnes at the spreader plus headblock — total lifted load including rigging of 25–75 tonnes for standard containers, up to 150 tonnes SWL for heavy-lift outreach operations. The hoist gearbox must incorporate a fail-safe spring-applied brake rated to hold 150% of the maximum suspended load torque with zero electrical power, per FEM 1.001 classification M5–M8 depending on the terminal’s annual cycle count.

Port equipment regulations in Australia (AS 4991), Canada (CSA B167), and Europe (EN 15011) require that STS hoist gearboxes are documented under the crane’s technical dossier with load test certificates, brake torque test records, and design life calculations for the classified duty cycle. A replacement gearbox that does not include these documents cannot be certified for crane service under any of these standards.

TROLLEY
60–120 m
Outreach span
15,000–50,000 Nm
Output torque

Trolley Drive — The Highest-Cycle Position

The trolley drive moves the spreader assembly horizontally along the crane girder — from the landside position above the quay truck lanes to the waterside outreach position above the ship’s hold — and back again for every container lift cycle. A high-productivity STS crane completes 30–35 crane cycles per hour. In a 20-hour operating day, this accumulates 600–700 full trolley travel cycles. The trolley drive gearbox therefore accumulates far more direction reversal cycles per day than any other drive on the crane.

This high reversal cycle count — comparable to an excavator swing drive but at much lower torque — makes planet carrier pin fatigue from reversal loading the primary trolley gearbox failure mode. The gearbox must be explicitly rated for reversal cycle service, with carrier pin bearing fatigue life calculated at the actual reversal frequency, not just at the continuous rotation torque. Standard industrial gearboxes without reversal documentation are not appropriate for the trolley drive position.

GANTRY
800–2,000 t
Crane total weight
30,000–150,000 Nm
Per drive unit

Gantry Travel Drive — The Highest-Torque Position Per Unit

The STS crane travel drive gearbox propels the entire crane structure — 800 to 2,000+ tonnes of steel and machinery — along the quay rails to reposition between ship bays. There are typically 4–8 gantry drive units on a large STS crane, each driving an independent rail bogey. The total gantry drive torque is distributed across all units, but any individual unit must be capable of providing the full gantry movement alone if other drives are temporarily out of service during maintenance.

For load capacity confirmation methodology applicable to all four STS crane drive positions, see our load capacity and service factor guide — the gantry drive is one of the clearest examples of a combined overhung load (rail bogey weight) + torsional torque application where both load parameters must be confirmed simultaneously.

BOOM HOIST
Intermittent
Duty cycle
50,000–200,000 Nm
Output torque

Boom Hoist Drive — Lowest Cycle, Highest Static Hold Torque

The boom hoist raises and lowers the landside boom — the structural arm that supports the machine room and counterweight. The boom is lowered only when a vessel requires more clearance than the horizontal boom provides or for crane maintenance access. The drive operates fewer cycles per year than any other drive on the crane but must hold the boom stationary against wind loads at any position for indefinite periods. The brake holding torque requirement for the boom hoist gearbox is typically 200% of the rated hoist torque — the highest brake factor of any crane drive position — because a boom drop event is a structural and personnel safety emergency.

OEM Gearbox Supply vs. Aftermarket — The STS Crane Procurement Decision

The Konecranes STS gearbox and Liebherr container crane drive gearbox supply chains are both historically dominated by European suppliers (Flender/Siemens, Rexnord, Renk) with long lead times and premium pricing for custom-specification units. The lead time for a factory replacement hoist gearbox on a Konecranes STS crane is typically 16–24 weeks — a duration that exceeds the practical berth outage tolerance of most container terminals. This supply chain constraint is the primary commercial driver for aftermarket sourcing of STS crane gearboxes.

Aftermarket sourcing is viable for STS crane gearboxes when: the dimensional specification (motor flange, shaft diameter, housing envelope, brake mounting) is confirmed against the original engineering drawings; the documentation package (load test certificate, brake test record, EN 13001 duty class confirmation) is complete; and the lead time is confirmed against the terminal’s operational needs. The port gantry crane planetary reducer for travel drive positions is often the most straightforward aftermarket procurement because the travel drive gearbox is a less customised design than the hoist — it uses a standard planetary reducer with a specific output pinion module, without the bespoke drum interface of the hoist gearbox.

Our S series high-torque planetary gearbox covers the torque range for STS crane hoist, trolley, gantry travel, and boom hoist positions across the full port crane size range. Engineering documentation packages — EN 13001 duty class confirmation, brake test certificate, load test record — are available for all S series units on request. Provide the crane model, OEM gearbox part number, and drive position for a technical comparison and formal quotation within 48 hours.

Ship-to-Shore Crane Gearbox — Full Documentation Package. Quoted in 48 Hours.

Crane OEM, drive position, rated SWL or torque, and OEM gearbox part number. We return a technical comparison, EN 13001 duty class confirmation, and formal quotation within 48 hours. MOQ 1 unit.

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📧 [email protected] · Canada Planetary Gear Drive Co., Ltd · ISO 9001:2015

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Condition Monitoring for STS Crane Gearboxes — The Port Maintenance Approach

Container terminals operate on maintenance strategies that differ from most other heavy industry facilities: planned shutdowns are measured in hours (the inter-vessel window), not days or weeks. An STS crane scheduled for the next vessel call in 6 hours cannot be taken out of service for a 12-hour gearbox inspection unless the inspection was already planned. This reality drives port equipment maintenance toward continuous condition monitoring rather than periodic disassembly inspection.

The standard condition monitoring programme for STS crane gearboxes in major container terminals includes: online vibration monitoring at the hoist and trolley gearbox housings (accelerometers connected to a continuous data acquisition system that alerts the maintenance team to gear mesh frequency changes beyond baseline); gear oil sampling every 500 hours for elemental wear metal analysis; and infrared thermal camera inspection of all gearbox housings during a scheduled vessel loading or unloading operation every 2,000 hours. This three-stream monitoring approach provides early warning of developing gear or bearing problems typically 1,500–3,000 hours before the point of failure — sufficient time to plan a replacement within a scheduled vessel-free maintenance window.

Our S series high-torque planetary gearbox covers all four STS crane drive positions from 34,000 Nm (trolley drive upper end) to 500,000+ Nm (hoist and boom hoist for large cranes). All units are supplied with vibration monitoring mounting bosses (threaded inserts for accelerometer mounting) as standard on housings above 50,000 Nm. Dimensional drawings and EN 13001 duty class documentation are provided before any order commitment. Contact us with the terminal name, crane OEM, and drive position for an expedited technical review and quotation.

Procurement Lead Time and Emergency Replacement Planning

For excavator and equipment fleets operating in remote locations — Australian mine sites, Canadian oil sands, offshore island infrastructure — the lead time for a swing or industrial gearbox replacement can determine whether a machine returns to service in days or weeks. Understanding the realistic lead time across procurement channels is the starting point for a rational spare parts holding strategy. Our standard lead time for stocked units is 2–5 days to Australian capital city ports, with air freight delivering in 5–8 days to most remote Australian mine site addresses via express freight services. Units requiring manufacturing (non-stocked specifications, unusual torque classes, or specialised seal configurations) carry 10–20 week lead times from order confirmation.

The break-even calculation for holding a spare gearbox on-site: divide the daily machine downtime cost by the unit price of the spare gearbox. For a machine producing $8,000/day of direct revenue, a $4,000 spare gearbox pays back its holding cost in 0.5 days of prevented downtime. For most medium and large excavators and industrial equipment, the spare gearbox holding cost is recovered within the first unplanned downtime event it prevents. We offer pre-season spare parts holding advisory for fleet operators — contact us with your fleet composition and operating location for a recommended spare parts matrix.

All orders are quoted with a confirmed lead time before payment is requested. Air freight orders placed before 12:00 AEST Monday–Friday ship the same day for stocked units. Contact us at [email protected] with the machine model and current location for a lead time confirmation specific to your site.

TAGs:container crane hoist gearbox | port gantry crane planetary reducer | ship-to-shore crane gearbox

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