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ASS278870
Assa 2788 Modular Deadlock 70mm Satin Chrome
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with a hardened steel deadbolt
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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Description
Modular Security Hardware
Assa 2788 Modular Deadlock 70mm Satin Chrome
Busy commercial buildings and public facilities require hardware that functions perfectly under constant pressure without fail. This modular deadlock provides a dependable solution for entrance doors and internal corridors that see high volumes of traffic every single day, keeping your property secure while maintaining easy access for those who need it most.
Engineers designed this unit with a focus on longevity so that it survives the heavy wear and tear of modern usage patterns. The high quality satin chrome finish brings a professional appearance to any door set while resisting environmental oxidation, ensuring that your building maintenance team spends less time replacing hardware and more time managing daily facility operations.
70mm
BACKSET
21mm
DEADBOLT THROW
90 DEG
TURN ANGLE
EN12209
SAFETY RATING
Why Choose the Assa 2788 Modular Deadlock 70mm Satin Chrome
This hardware offers a superior balance between physical strength and operational efficiency for the professional installer.
Engineered for High Usage
Internal components undergo rigorous stress testing to guarantee performance in environments where doors operate hundreds of times daily. This focus on material quality means the lock resists mechanical degradation over many years, which helps building owners avoid the cycle of frequent repairs and replacements that often plague lower quality alternative hardware options.
Consistent Mechanical Feel
The lock movement is calibrated to provide a distinct and positive action every time a user turns the key or thumbturn. By focusing on smooth internal transitions, the unit prevents the common issue of stickiness which often makes entry difficult, so your staff and visitors enjoy a predictable experience with every door entry.
Professional Finish Quality
The satin chrome plating provides a clean and modern aesthetic that suits contemporary office environments and public spaces perfectly. This finish is specifically chosen because it hides minor scuffs and marks well, which keeps the door hardware looking professional throughout its long service life even in high traffic areas of the building.
Engineering Quality and Daily Performance
A sophisticated internal design ensures that security remains effective while daily usage remains effortless for the occupant.
Internal Mechanism and Force Distribution
The steel housing serves as a rigid foundation for the internal spring mechanism which drives the 21mm deadbolt. By using hardened steel for the bolt itself, the product offers significant resistance against side loading and physical attack, which keeps the door securely held in the frame even when subjected to external pressure.
The geometry of the internal levers is designed to distribute force evenly across the casing, which helps to prevent localized metal fatigue. This thoughtful engineering approach reduces the strain on internal springs so that the lock action remains crisp and responsive even after tens of thousands of individual duty cycles in commercial properties.
Weather Resistance and Long-Term Finish
Surface coatings on the external faceplate and strike are selected to survive the varying humidity levels found in busy entrance lobbies and external vestibules. The satin chrome provides a protective barrier against corrosion, so you do not have to worry about pitting or discoloration occurring when the hardware is exposed to frequent handling or cleaning products.
All fasteners and internal moving parts are protected by the outer casing, which shields the mechanism from dust and debris accumulation. This closed design ensures that the lubrication stays inside where it belongs, so the lock maintains its fluidity throughout the seasons without requiring constant manual intervention or external servicing from your maintenance team.
Installation and Operational Workflow
Follow these steps to ensure a professional and precise installation that maximizes the lifespan of your new locking hardware.
1
Prepare the Mortice Cavity
Measure the door thickness and mark the lock position to correspond with the 70mm backset requirement. Carefully remove material to create a snug fit for the case, which prevents the lock from shifting inside the door frame when the deadbolt is engaged, so you achieve a clean and stable final result after the screws are tightened.
2
Secure the Case Furniture
Align the lock case within the door mortice and fix it securely using the provided mounting holes. Once the case sits flush, install the cylinder or thumbturn accessories through the side, as this allows you to test the alignment of the throw against the strike plate before final completion of the installation process.
3
Verify Operation and Alignment
Turn the key or thumbturn through the 90 degree rotation to ensure the bolt travels freely and fully into the receiver. If the bolt strikes the edge of the mortice, adjust the strike plate position slightly until the action is smooth, which prevents unnecessary friction and ensures long-term operational success for the daily users.
Expert Installation and Care Tip
Ensure that the screws holding the faceplate are not over-torqued, as this can potentially distort the housing and bind the internal springs. Use a soft cloth and a neutral cleaner to wipe down the satin chrome finish periodically, which removes oils and salts transferred from hands and keeps the hardware looking brand new for years.
Technical Specifications
| Feature | Rating / Standard | Practical Details |
|---|---|---|
| Case Depth | 94mm | Fits most standard commercial door stiles without requiring deep modifications. |
| Backset | 70mm | Provides ideal positioning for modern lever handles and decorative escutcheons. |
| Faceplate Size | 225mm x 22mm | Offers a substantial footprint for secure fixing into timber or metal edges. |
| Deadbolt Throw | 21mm | Ensures deep engagement with the frame for high level security retention. |
| Safety Rating | EN12209 CE Marked | Verifies compliance for public building safety and fire door hardware regulations. |
Longevity and Trade Reliability
Investing in this modular deadlock provides tangible savings over the lifecycle of the building by reducing maintenance call-outs. The robust construction is engineered to meet the demands of modern architects and facilities managers who prioritize reliable performance and simple, straightforward installation in their daily trade operations.
Compatibility and Fitting Notes
This unit requires separate purchase of a cylinder and thumbturn to complete the lock set for your door.
Check the existing door stile width to confirm the 70mm backset provides sufficient clearance for your specific handle plates.
Verify that your chosen cylinder length matches the door thickness when combined with your selected decorative escutcheon or handle set.
Specification
| Manufacturer | Assa |
|---|---|
| Finish | Satin Chrome |
| Lock Type | Mortice Deadlock |
| Lock Operation | Scandinavian Cylinder |
| Lock Backset | 70mm |
| Faceplate Width | 22mm |
| Environmental Suitability | All |
| Door Material Suitability | Wood |
| Forend Finish | Chrome |