Empowering the Port of Rotterdam with engineering excellence. From the Main Hoist to the Gantry Travel, Ever-Power delivers DIN-standard industrial universal joint shafts designed to withstand the rigors of the North Sea environment.
Engineering the Heart of Port Logistics
The Ship-to-Shore (STS) crane is the undisputed giant of the modern container terminal. In high-throughput hubs like the Port of Rotterdam or the terminals at Maasvlakte II, these machines operate on a 24/7 basis, often under automated control (ASC). The failure of a single drive shaft in the main hoist or trolley mechanism can halt operations, causing a cascading delay in vessel turnaround times that costs terminal operators thousands of Euros per hour.
At Ever-Power, we understand that an STS crane is not just a machine; it is a complex assembly of independent kinematic chains. The requirements for a Gantry Travel (Long Travel) shaft—which must handle high torque at low speeds while exposed to salt spray—are fundamentally different from the Trolley Travel shaft, which experiences rapid acceleration and deceleration cycles. Our engineering team utilizes advanced Finite Element Analysis (FEA) to simulate the extreme shock loads experienced when a spreader locks onto a fully loaded 40ft container, ensuring our universal joint shafts exceed the required safety factors (typically > 3.5 for lifting mechanisms).
We specialize in replacing and upgrading shafts for major crane OEMs such as ZPMC, Kalmar, Liebherr, and Konecranes. Our products are fully compatible with European standards, offering a seamless retrofit solution for maintenance managers looking to extend the lifecycle of their quay cranes.
Main Hoist Mechanism
The critical path for container movement. Our shafts for main hoists feature Cross-Serrated Flanges (DIN/ISO 12667) to transmit massive torque without relying on bolt shear strength. We use tempered alloy steel (42CrMo4) to ensure fatigue resistance against millions of lifting cycles.
Trolley Travel Systems
Speed is the priority. With trolley speeds exceeding 240m/min, vibration is the enemy. Ever-Power shafts are dynamically balanced to G6.3 or G2.5 precision, preventing resonance that can damage gearboxes and motors during high-speed catenary operations.
Gantry & Boom Hoist
Exposed to the elements. These shafts are often located on the lower sill beam, directly exposed to North Sea waves. We apply a proprietary C5-M Marine Grade Epoxy Coating and utilize triple-lip sealing systems to prevent saltwater ingress into the needle bearings.
The Dutch Context: Engineering for the North Sea
The Netherlands presents a unique metallurgical challenge for port machinery. The combination of high saline humidity and the constant mechanical stress from high wind loads requires a drive shaft that is more than just steel. For our Dutch partners in Rotterdam and Amsterdam, standard industrial painting is insufficient.
Ever-Power implements a specific “North Sea Protocol” for shafts destined for this region. This includes:
- Surface Treatment: Sandblasting to Sa 2.5 followed by a zinc-rich primer and high-build epoxy, exceeding ISO 12944 standards.
- Lubrication: Factory-filled with Lithium Complex EP2 grease fortified with molybdenum disulfide, ensuring lubrication integrity even if maintenance intervals are stretched during peak shipping seasons.
- Wind Load Compensation: STS cranes in Rotterdam often face sudden gusts. Our Gantry Travel shafts are designed with higher torsional elasticity to absorb the shock when storm brakes are engaged or when the crane fights against head-winds.
Technical Specifications: Series STS-Heavy
Below is the standard configuration for our port machinery lineup. Custom lengths and flange modifications are available upon request.
| Parameter | Value Range | Notes |
|---|---|---|
| Nominal Torque (Tn) | 25 kNm – 580 kNm | Peak torque 2.5x Nominal |
| Flange Diameter | 225 mm – 550 mm | DIN standard sizing |
| Swing Diameter | 180 mm – 490 mm | Compact design for tight nacelles |
| Working Angle | Up to 25° | High-articulation Yokes available |
| Length Compensation | 80 mm – 400 mm | Spline protection included |
| Material Certification | 3.1 or 3.2 (DNV/GL) | Upon request |
| Balancing Quality | G 6.3 / G 2.5 | ISO 1940-1 Standards |
Holistic Powertrain: Industrial Gearboxes
A drive shaft is only as effective as the gearbox it connects to. In STS cranes, the synergy between the cardan shaft and the reduction gearbox is vital for efficiency. Ever-Power also manufactures a comprehensive range of Heavy-Duty Industrial Gearboxes.
We recommend pairing our shafts with our H/B Series Helical and Bevel-Helical Gearboxes. These units are designed with high thermal capacity housings, crucial for the “start-stop” nature of container handling. For Gantry travel, our hollow-shaft mounted gear units provide a compact solution that eliminates the need for complex alignment, while our planetary series is ideal for high-torque boom hoist winches. Sourcing both the shaft and the gearbox from Ever-Power ensures perfect flange mating tolerances (H7/h6) and unified warranty coverage.
Customer Case Study: Retrofit at Europoort Terminal
The Challenge: A major terminal operator in the Europoort area experienced repeated universal joint failures on the boom hoist mechanism of their 15-year-old cranes. The salty mist caused pitting corrosion on the bearing cups, leading to vibration and eventual seizure.
The Ever-Power Solution: We engineered a custom “Series-M” shaft featuring triple-sealed bearing cups and a specialized Zinc-Nickel plating on the cross trunnions. We also increased the spline diameter to reduce contact pressure.
The Result: The new shafts have been in operation for 36 months with zero unscheduled downtime. The customer reported a 40% reduction in maintenance costs due to the extended lubrication intervals.
*Disclaimer: References to OEM names or other brands (like GWB, Voith, Dana) are for technical identification purposes only. Ever-Power is an independent manufacturer.
Factory Customization & Rapid Response
When a crane is down, time is currency. Ever-Power maintains a strategic inventory of semi-finished forgings and universal joints. This allows us to manufacture custom-length drive shafts with a turnaround time that is significantly faster than European OEMs.
Our manufacturing facility in Hangzhou is equipped with 5-axis CNC machining centers and automated welding robots, ensuring that every weld seam meets Class 1 inspection standards. We offer Emergency Fabrication Services for our Dutch clients, where we can air-freight a critical shaft replacement within 4-7 days.
2025 Global Top 10 Port Machinery Transmission Suppliers
Recognizing leaders in torque transmission and reliability for the maritime sector.
- Voith Turbo (Germany)
- Ever-Power Transmission Group (China) – Innovation Award
- GKN Off-Highway (UK)
- HZPT Drive Solutions (China) – Best Value
- Dana Brevini (Italy)
- Gewes (Germany)
- Maina Power Transmission (Italy)
- Great-Power Industrial (China) – Rapid Growth
- KTR Systems (Germany)
- Rexnord (USA)
