Semi-Automatic Twistlock BD-J1
— Secure Container Transport Solutions —
Product Overview
Semi-automatic twistlock is a critical container securing device used in shipping and logistics. It connects stacked containers or secures the bottom container to the ship’s deck. Compared to manual twistlocks, it automates part of the locking process, improving safety and operational efficiency. A total of four (semi-automatic) twistlocks are required to couple two shipping containers.
Pares & Maintenance: Common parts include the lock body, cone, spring mechanism, and operating lever. Regular inspection and lubrication are essential to maintain performance and extend service life.
How do automatic twist locks work?
When a container is lowered onto the twistlock, the lock’s cones automatically rotate and engage with the container corner castings. Unlocking requires a simple lever operation. This semi-automated process reduces manual handling at height.
As a professional supplier with over 10 years of industry experience, our company specializes in the production and export of container fittings and securing systems. OLIPORTS semi-automatic twistlock products are made of high-quality alloy steel and tested under strict quality standards, ensuring durability and reliability in marine and railway applications. We offer standard models such as the semi automatic twistlock BD J1, as well as customized models and weights, with stable supply capacity and fast delivery. If you are looking for trusted semi automatic twistlock parts and long-term cooperation, we are your reliable partner.
Technical Specification of Semi-Automatic Twistlock
- Model: BD-J1
- Weight: 4.9KG
- B.L. Shear: 420 kN (Min)
- B.L. Tension: 500 kN (Min)
- Safe Working Shear: 210KN
- Safe Working Tension: 250KN
- Material:Forged Steel
- Finish: Hot Dip Galvanized
- Class Approval: ABS, DNV-GL, CCS, Others
- Category: Loose Fittings on Deck
- Tags: Twist Lock; Container twistlock; ISO container twist locks; Lashing Equipment; Dovetail Twistlocks
* Can be customized according to your needs, type and test class approved on request.
Drawings and Features of Semi-Automatic Twistlock BD-J1
Key Features
Note: The yellow tip must always face upward. The lock engages automatically when placed, but disconnection requires pulling the orange button attached to the stainless steel cable.
- Automatic Locking & Remote Unlocking: The device locks automatically during container loading, and can be released remotely by pulling a wire or rod, minimizing manual work.
- Multiple Models Available: Including the popular semi automatic twistlock BD-J1, as well as customized options in different semi automatic twistlock weight and surface treatments.
- Strong and Durable: Made of high-quality alloy steel, with heat treatment and anti-corrosion coating, ensuring long service life under marine and railway conditions
- Weldable & Class Approved: Meets ABS, DNV-GL, CCS, and ISO standards
Application
The semi-automatic twistlock plays a critical role in securing containers across different transportation stages. Typical application scenarios include:
- Vessel Deck Stacking: In long-distance marine shipping, containers are stacked in multiple layers on vessel decks. A semi automatic twistlock for container locks automatically during loading, ensuring containers remain stable even under rough sea conditions.
- Port Terminal Operations: In container yards and terminals, semi-automatic twistlocks are widely used for efficient stacking and unstacking. They reduce the need for workers to climb onto containers, improving safety and operational speed.
- Railway Transport Securing: During railway transport, containers must be secured to prevent shifting. A semi auto twistlock automatically locks when the container is loaded, providing stability during train movement.
- Short-Distance and Intermodal Transport: For inland logistics and intermodal transfers, semi-automatic twistlocks offer reliable locking and unlocking functions. Whether for truck transfers or temporary yard storage, they provide flexible and safe solutions.
If you are considering what are the advantages in using a semi automatic twistlock, the above scenarios show how they improve efficiency, safety, and reliability in different transportation environments.
Recommended Accessories
To meet the complete requirements of container securing and stacking, the semi-automatic twistlock is often used together with the following accessories:
- Manual Twistlock: Still widely used in cost-sensitive or simpler operations, manual twistlocks can be combined with semi-automatic twistlocks for flexible solutions.
- Fully Automatic Twistlock: Designed for highly automated port operations, these twistlocks provide full automation and can complement or replace semi-automatic models. (How do automatic twist locks work? They lock and unlock entirely through automation, without manual intervention.)
- Double Stacking Cone: Used for aligning and securing two containers when stacked vertically on vessels or in yards.
- Bridge Fitting / Lashing Bar: Essential for securing containers laterally on ship decks or in stacking yards, preventing sideways movement.
- Base & Pin Parts: Supporting components that work with semi automatic twistlock parts to enhance securing strength under different working conditions.
With our one-stop supply of semi automatic twistlock for container together with related securing accessories, we help customers reduce procurement costs, improve efficiency, and guarantee safe transport across marine, rail, and yard operations.
Why OLIPORTS?
At OLIPORTS, we manufacture container securing components with unmatched engineering precision and industry know-how.
With over a decade of manufacturing and global distribution experience, OLIPORTS has developed deep expertise in container lashing and cargo securing systems. We fully understand the design drawings, structural layouts, and mechanical calculations behind every container ship’s securing solution — allowing us to respond quickly and accurately to your technical requirements.
- Deep understanding of ship drawings and classification standards
- Over 10 years of global lashing system supply experience
- Support for custom layouts to match your vessel and route
- Certified by CCS, ABS, DNV-GL, and compliant with ISO 3874 / ISO 1161
- Fast quote turnaround and fewer sample revisions
- Trusted by yards, shipowners, and retrofit contractors worldwide
Built to perform. Certified to last. Delivered on time. Our in-house design and fabrication capabilities ensure fast delivery, high compatibility, and long-term durability.
Request a Quote or Drawing
OLIPORTS offer: Technical Datasheet PDF、Material Certificates、DWG or STEP files for design integration、On-request layout support. Our lashing experts typically reply within 24 hours. 💡 Based on your port design, berthing energy, and vessel data, we’ll provide:
⚙️ Recommended drawings & specifications
💬 A tailored quotation with best lead time
📎 Support for class approval documents
Contact Us
We’re here to assist you with any inquiries. One of our product specialists will get back to you within 24 hours with the information you need.
