In architectural ironmongery, a single cylinder is utilized when the locking mechanism is only accessible from the exterior.

Key Benefits of the 50mm Length

Standard Reach: At 50mm, this 50mm euro profile single cylinder is slightly longer than the basic 40mm or 45mm half-cylinders. This extra length is often required for modern composite gates or garage doors with decorative external handles where a shorter barrel would be recessed too deeply.
Adjustable Cam Performance: Most high-quality 50mm single cylinders feature an adjustable 8-position cam. This allows the internal actuator to be rotated to match the specific “throw” required by different brands of shutter locks or panic hardware.
Enhanced Tamper Resistance: Because there is no keyway on the interior, there is no “through-hole” for an intruder to exploit using wires or specialized picking tools from the inside of the garage or warehouse.
Debris Protection: Ideal for external environments. The solid internal side prevents rain, dust, and insects from blowing through the lock cylinder and into the building or mechanism.

Precision Sizing: The 40/10 Offset

A 50mm euro profile single cylinder is measured from the center of the fixing screw to each end. Because the “blind” side is a fixed mechanical standard (10mm) to house the cam and fixing point, a 50mm cylinder is an asymmetric split.

Side A (External Keyway)	Side B (Internal Blind)	Total Length
40mm	10mm	50mm

Pro-Tip: Always measure from the center of the locking screw toward the outside face of the door. If that distance is 40mm, this is the correct cylinder for your installation.

Technical Specifications of 50mm euro profile single cylinder

Feature	Detailed Specification
Total Length	50mm
Cylinder Type	Single / Half (Keyed one side only)
Security Rating	BS EN 1303 Grade 6 Security
Pin Configuration	6-Pin High Security (Anti-Pick)
Protection Tech	Anti-Drill, Anti-Pick, Anti-Bump
Material	Solid Brass (Available in Satin Nickel or Brass)

Recommended 50mm Single Cylinders

For high-use commercial shutters or premium garage doors, the 50mm euro profile single cylinder is an exceptional choice. Its 10-pin system provides superior pick resistance, making it a favorite for industrial units and high-end residential garages.

For standard residential gates or internal storage cupboards, the ERA 6-Pin Single Cylinder (available in 40/10) offers a robust, cost-effective solution. It features hardened steel anti-drill pins and a mushroom driver system that resists picking and bumping, ensuring long-term reliability in external environments.

Installation Pro-Tip: The “Cam Alignment”

When installing a 50mm euro profile single cylinder into a panic bar or shutter, you may find the key won’t turn. This is often because the internal cam is not in the correct starting position.

Use the key to rotate the cam until it aligns with the internal actuator of your lock.
Once aligned, the cylinder should slide in effortlessly.
Tighten the fixing screw, then test the operation with the door open to ensure the deadbolt throws and retracts smoothly.

Upgrade your door security with the 50mm euro profile single cylinder designed for reliable locking and smooth operation. Each cylinder comes with its own unique key, providing independent access for residential, commercial, and multi-unit properties. The 50mm Euro profile ensures a precise and secure fit for standard doors, offering a practical and durable locking solution.

Manufactured from premium-quality materials, the 50mm euro profile single cylinder resists tampering, forced entry, and daily wear, ensuring long-term performance. Its keyed-to-differ design allows each cylinder to function independently, making it ideal for offices, apartments, and properties with multiple doors. Easy to install and built for consistent use, this 50mm euro profile single cylinder lock combines strength, convenience, and peace of mind.

A 50mm Euro Profile Single Cylinder (often referred to as a 40/10 Half Cylinder) is a specialized security barrel designed for doors that only require key access from one side. This makes it the industry standard for garage doors, rolling shutters, garden gates, and surface-mounted panic bars, where an internal keyway is either unnecessary or physically obstructed.

By featuring a “blind” internal face, this cylinder provides a clean, tamper-proof finish on the protected side of the door.