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LEG5511
TWH (Legge Replacement) 5511 51mm PB 5 Lever Deadlock Door Lock
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5511 51mm Pb 5 Lever Deadlock Door Lock
In stock
Delivery Information
| Delivery Time Frame | Delivery Information |
| Next Working Day By 1PM | When an order is placed by 3pm for next working day on certain items |
| Standard Delivery | Usually delivered in 2 to 4 working days |
| Delivery Charges | |
| UK Mainland | Prices start at £3.95 for very small items, £6.50 for small, £9.50 for medium and £20 for large/long items |
| Scottish Highlands & Islands, Northern Ireland & Ireland | Prices from £30, please see our delivery page for more info. |
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£86.38
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£71.98
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Description
TWH Legge Replacement 5511 51mm PB 5 Lever Deadlock Door Lock
Securing your premises requires hardware that balances physical strength with reliable mechanical operation. The TWH 5511 51mm PB 5 Lever Deadlock Door Lock serves as a robust solution for those who demand uncompromising security for internal or external timber doors. With its precision engineering and classic polished brass finish, this unit provides a sophisticated aesthetic while maintaining a formidable barrier against unauthorised entry.
Choosing the right locking mechanism is a fundamental step in building a secure environment for your home or office. This high quality deadlock model is designed to withstand everyday use, offering a seamless experience that ensures your property remains protected around the clock. By investing in reputable hardware, you are making a conscious decision to safeguard your assets and enhance the longevity of your door security system.
Mechanical Physics and Structural Integrity
The operational success of this deadlock lies in its complex internal lever mechanism. When you insert the key, you are initiating a sequence of mechanical movements where five distinct levers are lifted to a precise height. This alignment is critical because it creates a clear path for the bolt to retract from its locked position into the door frame.
The physical force applied by the user via the key provides the torque necessary to overcome the spring tension and the frictional resistance within the casing. Because the internal components are manufactured from high grade steel, the device resists shearing and bending forces that might occur during attempted forced entry. The internal springs are calibrated to provide enough feedback to the user, ensuring the locking action feels smooth yet deliberate every single time the key is turned.
Step by Step Operational Workflow
Using this locking system is an intuitive process that feels natural after only a few uses. First, ensure the door is pulled firmly against the frame to align the bolt with the keep or the strike plate. Second, insert the key fully into the keyway until you feel it seat against the internal levers.
Third, apply a steady, consistent rotational force to the key. You will feel the levers shifting internally as they find their gate, allowing the bolt mechanism to slide smoothly into or out of the locked position. Finally, once the bolt is fully engaged, rotate the key back to the neutral position and remove it from the lock. This sequence ensures that the locking bolt is fully extended, providing maximum coverage and stability within the door frame.
Ergonomic Health and Safety Compliance
Modern security hardware is not just about keeping intruders out but also about ensuring that those inside can operate the system without physical strain. This unit has been refined to ensure that the key rotation requires minimal torque, making it accessible for individuals with varying levels of grip strength. By reducing the effort required to lock or unlock a door, the design actively prevents repetitive strain issues and lowers the risk of operational errors.
Furthermore, in a commercial or professional environment, compliance with fire and safety regulations is paramount. The TWH 5511 51mm PB 5 Lever Deadlock Door Lock is built to meet rigorous industry standards for performance and safety. When installed correctly, the hardware facilitates efficient egress and secure containment, helping facility managers maintain a safe environment that meets legal insurance requirements for business premises.
Commercial ROI and Long Term Value
Selecting premium ironmongery like this model represents a sound financial strategy for property owners. Cheap, low-quality locks often suffer from metal fatigue, internal spring failure, or surface oxidation within a short period. In contrast, this model uses durable materials that resist environmental wear, significantly extending the time between necessary replacements.
By minimising the frequency of hardware failure, you reduce the recurring costs associated with emergency locksmith callouts and door repairs. When viewed as an investment in the long-term value of your property, this item pays for itself through its reliability. It provides peace of mind that your assets are protected by a system that refuses to fail under standard stress, reducing administrative overhead and maintenance fatigue for facility managers and homeowners alike.
Key Features of the 5 Lever Deadlock
This deadlock has been engineered to provide maximum security across a wide variety of timber doors. Every component serves a specific purpose in the overall structural integrity of the door assembly.
- The five lever mechanism provides a high degree of key security, making it difficult for unauthorised individuals to bypass the internal components.
- The polished brass finish offers a high level of corrosion resistance, which is essential for maintaining a clean and professional look over many years.
- The case size is specifically designed to fit standard mortise cavities, ensuring an easier installation process for professional contractors.
- Hardened steel bolts are included to increase the resistance to sawing or physical tampering, providing an added layer of protection against force.
- Every unit undergoes strict quality control testing to ensure that the internal levers move smoothly without any grinding or seizing.
- The design is perfectly suited for use in residential environments, commercial offices, and utility rooms where security is a high priority.
Choosing this TWH (Legge Replacement) 5511 51mm PB 5 Lever Deadlock Door Lock provides an ideal balance of historical security performance and modern manufacturing precision. Ensure your property remains secure with a trusted hardware brand that professionals rely on every day.
Technical Specifications
Understanding the precise dimensions and material composition of your hardware is essential for ensuring a correct fit during installation. Please refer to the table below for the specific details of this unit.
| Specification | Detail |
|---|---|
| Product Type | Mortise Deadlock |
| Backset Measurement | 51 Millimetres |
| Lever Count | 5 Lever System |
| Finish | Polished Brass |
| Case Material | Steel |
| Security Level | High Security |
| Application | Internal or External Timber Doors |
| Bolt Material | Hardened Steel |
Installation and Maintenance Guidance
To get the best performance out of your new deadlock, we recommend following professional installation practices. Begin by marking the door edge accurately before cutting the mortise, ensuring that the cavity is clean of debris. A tight fit is crucial to prevent the casing from shifting over time, which can cause the bolt to drag against the strike plate.
Maintenance is equally simple. You should periodically check the strike plate alignment to ensure the bolt enters the hole cleanly without friction. If the door experiences seasonal swelling due to humidity, slight adjustments to the strike plate will keep the locking action smooth. Avoid using heavy oil-based lubricants inside the keyway, as these can attract dust and impede the movement of the delicate internal levers.
For most environments, a light spray of a dry PTFE lubricant once a year is sufficient to keep the internal mechanism operating at peak efficiency. By taking these small steps, you ensure the longevity of your hardware and continue to enjoy the security benefits for many years to come.
Why Choose Professional Grade Hardware
At Doorfit, we understand that our customers need solutions that work without fail. The choice of materials in this product is deliberate, focusing on metals that resist environmental stress and daily operational wear. While some cheaper alternatives might look similar, they often lack the heat-treated components that provide genuine resistance to brute force.
This item is the gold standard for those who do not want to worry about their door security. Whether you are upgrading a home entryway or securing a private office, the peace of mind offered by a high quality five lever system is unmatched. Shop with confidence knowing that you are installing a product with a proven reputation in the security hardware market.
If you require further information on installation or compatibility with your existing door furniture, our team is always ready to assist. We take pride in helping our customers find the right security solutions for their specific needs, ensuring every purchase adds value and safety to their property. Invest in quality today to avoid the inconvenience of lock failure tomorrow.
Specification
| Manufacturer | TWH |
|---|---|
| Dimensions | 108 (H) x 51 (D) |
| Guarantee | 1 Year |
| Lock Type | Mortice Deadlock |
| Lock Operation | Lever |
| Lock Backset | 35mm |
| Follower Size (mm) | N/A |
| Faceplate Width | 25mm |
| Environmental Suitability | All |
| Mechanism | Dead Lock |
| Door Material Suitability | Wood |
| Max Door Thickness (mm) | 50 |
| Forend Finish | Polished Brass |