Engineered for the corrosive salinity of the North Sea and the high-torque demands of Felixstowe and Southampton terminals.
Core Technology: Maritime Power Transmission Logic
In the high-risk environment of UK port logistics, standard industrial shafts fail prematurely due to “micro-friction corrosion” caused by the combined effects of salt spray and minute movements of crane gantry. Our marine-grade SWC series utilizes proprietary Nitrotec surface treatment technology on the splines, ensuring continuous operation even in the strong winds common in the Suffolk coastal region.
Torque Density
Optimized for low-speed, high-torque start-ups typical of loaded container hoists (Hoisting Speed < 1m/s).
Corrosion Class C5-M
Epoxy primer + PU topcoat exceeding ISO 12944 standards for marine splash zones.
PUWER Compliance
Fully guarded assemblies meeting UK Provision and Use of Work Equipment Regulations 1998.
Technical Specifications: SWC-DH Heavy Duty Port Series
The following parameters represent our standard production capabilities for Ship-to-Shore (STS) and Rubber Tyred Gantry (RTG) crane applications. Custom lengths available upon request.
| Ідентифікатор параметра | Технічний показник | Значення / Специфікація | Note |
|---|---|---|---|
| 01 | Номінальний крутний момент (Tn) | 48 000 Нм | Continuous rating |
| 02 | Fatigue Torque (Tf) | 22,500 Nm | Reversing load cycle |
| 03 | Руйнівний момент | 89,000 Nm | Ultimate limit state |
| 04 | Діаметр фланця | 285 мм | DIN 15451 Standard |
| 05 | Number of Bolt Holes | 10 x M20 | Class 10.9 H.T. |
| 06 | Діаметр окружності болта | 250 mm | Precision machined |
| 07 | Довжина в закритому вигляді (Lc) | 1850 мм | Retracted state |
| 08 | Maximum Extension | 140 мм | Spline travel |
| 09 | Діаметр трубки | 180 мм | Безшовна сталь DOM |
| 10 | Товщина стінки труби | 12,5 мм | Посилений на кручення |
| 11 | Клас матеріалу | 42CrMo4V | Загартований та відпущений |
| 12 | Шліцеве покриття | Рілсан® Блакитний | Low friction/Anti-corrosion |
| 13 | Робочий кут (макс.) | 15 градусів | Articulation limit |
| 14 | Динамічне балансування | G6.3 @ 1500 RPM | ISO 1940-1 |
| 15 | Cross Kit Span | 135 mm | Heavy duty bearing |
| 16 | Bearing Cap Diameter | 65 mm | Wing style available |
| 17 | Lubrication Point | Centralized | Option for auto-lube |
| 18 | Специфікація фарби | C5-M Marine | 320 microns DFT |
| 19 | Діапазон робочих температур | від -30°C до +80°C | North Sea compatible |
| 20 | Крутіння жорсткість | 3.45 x 10^6 Nm/rad | Висока жорсткість |
| 21 | Критична швидкість | 3200 об/хв | Theoretical limit |
| 22 | Вага (приблизно) | 215 kg | Без упаковки |
| 23 | Фактор обслуговування | 2.5 – 3.0 | Recommended for Cranes |
| 24 | Тип фланця | Face Key / Hirth | Serrated optional |
| 25 | Цикл технічного обслуговування | 500 Hours | Regreasing interval |
| 26 | Spline Protection | Neoprene Boot | Salt spray resistant |
| 27 | Сертифікація | DNV-GL Type Approval | Upon request |
| 28 | Матеріал хомута | Forged S45C | Heat treated |
Maintenance, Failure Analysis & Reliability Management in Port Environments
Lubrication Strategy for UK Coastal Operations
In the maritime logistics sector, lubrication serves a dual purpose: reducing friction and forming an active corrosion barrier. For cranes operating in ports such as Felixstowe or Liverpool, the saltwater environment creates a “pumping effect” during extension and retraction, drawing humid air into the bushings.
- Вибір мастила: We mandate the use of Lithium Complex greases with Extreme Pressure (EP) additives. For operations in Northern Scotland or winter maintenance, low-temperature synthetic greases are required to prevent channeling.
- Grain Unloaders: For equipment handling foodstuffs, H1 Food Grade grease is mandatory to comply with UK food safety standards.
- Frequency Protocols:
- Gantry Travel (Gantry): Every 3 months or 500 hours. These shafts are low to the ground and suffer from direct saltwater splash.
- Main Hoist: Every 1000-1500 hours.
- Bucket Wheel/Boom: Recommended installation of automatic centralized lubrication systems to ensure a constant “purge” of contaminated grease.
Forensic Analysis: Common Failure Modes
Based on our returns department analysis from UK port clients, three failure modes dominate the sector:
- Cross Kit Fatigue: Often found in grab unloaders. The cause is typically shock loading exceeding the fatigue limit during the “biting” phase of the grab into the cargo. The fracture surface typically exhibits classic “beach marks” (clamshell markings).
- Spline Seizure (The Silent Killer): Prevalent in Long Travel (Gantry) drives. Due to structural flexing of the crane legs, the shaft spline must telescope constantly. If lubrication fails or seals breach, saltwater ingress causes “Fretting Corrosion.” The spline locks solid, transmitting massive axial loads into the gearbox, often shattering the gearbox casing or motor bearings.
- Flange Bolt Shearing: Occurs on diesel-driven generator sets on RTGs. Caused by torsional vibration resonance or incorrect torque tightening sequences. We recommend Hirth serrated flanges or dowel pins for these high-vibration applications.
Condition Monitoring (i.Sense Technology)
Modern “smart ports” are moving away from time-based maintenance models. By installing triaxial vibration sensors and thermocouples on the trunnion cover, operators can detect specific spectral characteristics of needle roller bearings weeks before they peel off and fail. This shifts the maintenance model from “repairing only when a failure occurs” to “repairing during the next planned downtime.”
Місцезнаходження: Container Terminal, Suffolk Coast, UK
Subject: Retrofit of Main Hoist Drives on Panamax Cranes
Date: October 14, 2024
The Problem: The terminal reported excessive vibration in Crane #4’s hoist system. Original OEM shafts (installed 2012) showed 4mm of backlash in the sliding spline. The maintenance manager noted that the previous shafts required regreasing every week due to washout from heavy rain and wind-driven sea spray.
Рішення: We deployed the UK pto-drive-shafts.com Co.,Ltd Marine-Spec Series with a specialized Rilsan coated spline. This nylon-based coating provides a permanent glide layer that resists saltwater washout. We also upgraded the universal joints to a “Maintenance-Free” design for the difficult-to-reach boom hinge point, utilizing triple-lip sealing technology.
Outcome: Vibration levels dropped by 85%. The maintenance interval was extended from weekly to quarterly. The terminal operator estimates a saving of £12,000 annually in maintenance labour per crane.
UK Regulatory Compliance & Safety Standards
Operating heavy machinery in the UK requires strict adherence to safety legislation. Our products are designed to support your compliance with:
PUWER 1998 (Provision and Use of Work Equipment Regulations)
Regulation 11 of PUWER mandates effective guarding of dangerous parts. All our port application shafts can be supplied with:
- Reaction-Free Guards: Stationary yellow thermoplastic tubes that do not rotate with the shaft, preventing entanglement.
- Walkway Protection: For вали crossing maintenance walkways, we provide heavy-gauge steel tunnel guards.
Marine Classification
For shipboard cranes, we offer full traceability and 3.2 certification in accordance with:
- Lloyd’s Register (LR)
- DNV (Det Norske Veritas)
- Bureau Veritas (BV)
Interchangeability & Brand Comparison
We understand that mixed fleets are common in UK ports. Our engineering team has developed a comprehensive cross-reference database to replace legacy components without modification to the gearbox or motor flanges.
| Функція | Standard OEM (e.g., GKN/Voith Type*) | UK pto-drive-shafts.com Co.,Ltd Marine Solution |
|---|---|---|
| Spline Protection | Standard Phosphate | Nitrotec + Rilsan Coating |
| Герметизація | Double Lip | Triple Lip + Flinger Shield |
| Lead Time (UK) | 8-12 Weeks | 3-4 Weeks (Rapid Assembly) |
*Legal Disclaimer: All manufacturer names, symbols, and descriptions, including but not limited to GKN, Voith, Comer, Gewes, and Dana Spicer, are used for reference purposes only and it is not implied that any part listed is the product of these manufacturers. UK pto-drive-shafts.com Co.,Ltd is an independent manufacturer of compatible aftermarket components.
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Complete Driveline Solutions: Port Crane Gearboxes
А карданний вал is only as reliable as the gearbox it connects to. In addition to shafts, we manufacture and refurbish heavy-duty industrial gearboxes tailored for the port industry.
Compatible Gearbox Systems
We recommend pairing our SWC-DH shafts with our EP-Port Series Gearboxes, designed to withstand the “Plug Reversal” braking forces common in crane operations.
- Main Hoist Gearboxes: Parallel shaft helical units capable of 200kNm torque.
- Gantry Travel Drives: Bevel-helical units with integrated brake mounting flanges.
- Boom Luffing Drives: Planetary units offering high reduction ratios in compact spaces.
Our gearboxes feature case-carburized gears ground to AGMA 12 standards, ensuring quiet operation even under the echo-amplifying structure of a port crane.
Frequently Asked Questions (UK Port Operations)
Q: Can you deliver to restricted port zones like Felixstowe or London Gateway?
A: Yes. Our logistics partners hold the necessary security clearances (RHIDES cards etc.) to deliver directly to port engineering stores.
Q: How do I measure a seized shaft for replacement?
A: Do not rely on the seized length. Measure the “Flange-to-Flange” distance on the machine itself (between the motor and gearbox faces) and provide us with the flange dimensions. We will calculate the necessary compressed length and stroke.
Q: Do you offer emergency breakdown services?
A: For UK customers, we offer a “Red Alert” manufacturing service where shafts can be machined, assembled, balanced, and painted within 72 hours for critical breakdowns.
