Euro Profile V10 Double Cylinder 45/55mm – Keyed to Differ

In a “Double” configuration (Key/Key), the 55mm euro profile double cylinder offers maximum security for entrances where internal control is just as important as external protection.

Key Benefits of the 55mm Length

• Narrow Stile Compatibility: Standard 60mm–70mm cylinders often protrude too far from slim-profile aluminum or steel doors. The 55mm length provides a sleek, flush fit that minimizes the risk of the lock being “snapped” or tampered with.

• Internal Exit Control: Ideal for retail or commercial spaces where you want to prevent unauthorized exit. Because a key is required to unlock the door from the inside, 55mm euro profile double cylinder acts as a significant deterrent to “smash and grab” theft.

• Shatter-Point Security: If the door has a glass panel, an intruder cannot simply break the pane and reach in to turn a thumbturn. The internal key-way ensures the door stays deadlocked.

• Precision Engineering: Despite its smaller size, high-quality 55mm cylinders still incorporate advanced security features like anti-pick pins and hardened steel anti-drill plates.

Precision Sizing: The 55mm Offset

Because 55mm is an asymmetric total length, the “offset” is critical. 55mm euro profile double cylinder are measured from the center of the fixing screw hole to each end. For a 55mm cylinder, you will almost always see:

• 27.5 / 27.5 (Symmetric): The fixing hole is exactly in the center. This is the standard for 35mm–40mm doors where the mortice lock is perfectly centered.

• 25 / 30 (Asymmetric): Often required for narrow-profile doors where the locking mechanism is slightly offset to one side to accommodate weather-stripping or decorative trim.

Security Note: A Euro cylinder should never protrude more than 3mm from the face of the handle. For a 55mm barrel, ensure your handle backplates are thin enough to allow the key to fully engage with the cylinder.

Technical Specifications of 55mm euro profile double cylinder

Recommended High-Security 55mm Cylinders

For premium residential or commercial protection, the Yale Platinum 3-Star (available in specialized short offsets) is a top-tier choice. It is Sold Secure Diamond approved and features a sacrificial “snap-line” that protects the core even if the external portion of the lock is attacked.

For a reliable, professional-grade solution for internal office doors or shopfronts, the ERA 6-Pin Euro Cylinder offers exceptional durability. Its 6-pin “mushroom” driver system makes it highly resistant to picking, providing peace of mind for high-traffic environments.

Maintenance for Longevity

To keep your 55mm euro profile double cylinder operating smoothly, avoid using oil or WD-40, which can gunk up the internal pins over time. Instead, use a dry graphite lubricant or a specialized PTFE lock spray once a year to ensure the key slides in effortlessly.

Enhance your door security with the 55mm euro profile double cylinder, designed for smooth operation, reliable performance, and long-lasting durability. The 45/55mm sizing ensures a precise fit for standard doors, making it suitable for residential, commercial, and multi-unit applications. With strong resistance against tampering and forced entry, this double cylinder provides dependable security for everyday use.

Crafted from premium materials, the 55mm euro profile double cylinder delivers consistent performance and long-term durability. Its keyed-to-differ system allows each cylinder to operate with its own unique key, making it ideal for offices, apartments, and multi-door installations. Easy to install and built for everyday use, this cylinder lock combines strength, convenience, and peace of mind in one robust design.