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EUR-CYA7123540
Eurospec 75mm Offset (35/40) Euro Double Cylinder Lock
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The Eurospec 75mm Offset (35/40) Euro Double Cylinder Lock is available in either a Polished Brass or Satin Chrome finish
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| 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
Architectural Door Hardware
Eurospec 75mm Offset Euro Double Cylinder Lock
Securing an entrance requires a precise balance between physical resistance and the mechanical reliability needed for daily use. This 75mm offset cylinder is manufactured to accommodate specific door configurations where the lock spindle sits off-centre, a common requirement in both heritage properties and modern commercial fit-outs. By using a 35/40 offset measurement, this cylinder provides a tailored fit that prevents the internal drive mechanism from binding or straining under tension, which supports longevity for your locking system.
You can choose between high-quality polished brass or sleek satin chrome finishes, allowing the lock to integrate naturally with your existing door furniture and handle sets. Because this unit arrives with three keys and all necessary fixing components, you possess everything needed for a rapid upgrade to your security profile. It represents a focused approach to door maintenance where the quality of the internal components takes precedence over unnecessary bells and whistles.
75mm
TOTAL LENGTH
35/40
OFFSET RATIO
FD30/60
FIRE RATING
3 KEYS
INCLUDED SET
Why Choose the Eurospec 75mm Offset (35/40) Euro Double Cylinder Lock
This cylinder offers a reliable and precise solution for standard thickness doors that demand a specific offset for mechanical alignment.
Tailored Offset Dimensions
Measuring 35mm on one side and 40mm on the other, this unit solves the issue of protruding cylinders that look unsightly or represent a security weakness. By matching your door thickness correctly, you obtain a flush fit that protects the cylinder body from unauthorised attempts to grip or manipulate the exposed metal casing.
Fire Door Compliance
Safety regulations within the United Kingdom require specific certifications for fire-rated access points. This cylinder meets the standards for FD30 and FD60 fire door assemblies, which means you can install this hardware with full confidence that you are meeting your building safety obligations while maintaining excellent security for your premises.
Durable Protective Finishes
Each unit features a protective coating that resists corrosion and oxidation, even in high-traffic or coastal areas. Whether you select the warm, traditional appeal of polished brass or the understated, modern look of satin chrome, the surface remains easy to clean, which helps your door hardware retain its aesthetic appeal for many years.
Engineering Quality and Daily Performance
Internal components are designed to work in harmony so that you experience a smooth and consistent action every time the key turns.
Internal Pin Mechanics
The internal pin mechanism uses high-grade materials to prevent key jamming and lock sticking. Because the pins move with high tolerance, the key operation feels weighted and positive rather than loose or gritty, which tells you the internal springs are correctly tensioned for daily use in a busy home or commercial office.
We provide these units as keyed to differ, which means every cylinder has a unique key pattern for its specific pins. This independence prevents someone else from opening your lock with a key from another room or unit, so your internal security boundaries remain distinct and effective throughout your entire building or office floor.
Material Integrity and Longevity
High-density alloys provide the strength needed to withstand external pressure and environmental wear. The metal surfaces are resistant to the minor abrasions that occur when keys are inserted repeatedly, which keeps the face of the cylinder looking clean and prevents the finish from peeling or tarnishing under standard daily conditions.
Simple maintenance involves wiping the cylinder with a clean, damp cloth periodically to remove dust or accumulated grime. You should avoid aggressive detergents or abrasive brushes because these can strip the protective finish, but a light touch keeps the mechanism working perfectly for a long service life in any standard internal or external door environment.
Installation and Operational Workflow
Installing your new cylinder is a straightforward task that relies on accurate measurement and steady handling of the fixing screw.
1
Measure the Existing Aperture
Start by removing the old cylinder to measure the distance from the centre of the fixing screw hole to the outside edge of the door on both sides. This ensures that your new 35/40 offset cylinder will sit correctly in your door lock case, which is the most important step for a successful and secure installation.
2
Position the Cylinder
Slide the new cylinder into the lock case while the door is in the open position to ensure you have full access to both sides. You may need to insert your key and rotate the cam slightly to align the cylinder correctly with the hole in the door so that it slides through without catching on the internal plate.
3
Secure the Fixing Bolt
Insert the supplied fixing screw through the edge of the door and tighten it into the cylinder until you feel resistance. Do not overtighten this screw because you only need to ensure the cylinder is held firmly in place, which prevents any movement when you operate the key to lock or unlock the door mechanism.
Expert Installation and Care Tip
Always test the lock with the door open before you finish the job to ensure the key turns smoothly on both sides. If the key feels tight, adjust the position of the cylinder by a fraction of a millimetre before you tighten the fixing screw completely to ensure the cam aligns perfectly with your lock case.
Technical Specifications
| Feature | Rating / Standard | Practical Details |
|---|---|---|
| Total Length | 75mm | The measurement from end to end covers standard internal or external door widths. |
| Offset Split | 35mm / 40mm | This asymmetric design accounts for doors where the spindle is not centered. |
| Fire Rating | FD30/60 Certified | Approved for use on fire-rated doors to maintain building regulation compliance. |
| Keying Method | Keyed to Differ | Every lock comes with unique key profiles for your personal site security. |
| Included Parts | Full Set | Includes three keys, one fixing screw, and necessary mounting retainers. |
Longevity and Trade Reliability
These cylinders are selected for their ability to handle heavy usage cycles without mechanical failure. By choosing this hardware, you invest in a solution that minimizes the need for future replacements and provides consistent daily operation for building owners and contractors.
Compatibility and Fitting Notes
This cylinder works with most standard timber, composite, and metal doors that accept a Euro profile system.
Always verify your door thickness before ordering to ensure the 75mm length is appropriate for your specific door setup.
The finish should be cleaned with a soft cloth only as harsh cleaning agents can affect the longevity of the brass or chrome plating.