Heavy-Duty EN 1303 Certified Double Euro Thumbturn Cylinder for Commercial & Residential Door Systems
Product Overview & Core Specifications
The Double Euro Thumbturn Cylinder provides secure exterior key access paired with immediate, keyless internal egress. Engineered to DIN 18252 and EN 1303 dimensional standards, this cylinder integrates directly into standard Euro mortise lock bodies used in aluminum, steel, timber, and uPVC profile doors.
Technical Specification Matrix
|
Parameter |
Specification |
Compliance / Standard |
|
Profile Type |
Euro Profile (Double Cylinder with Thumbturn) |
DIN 18252 / EN 1303 |
|
Standard Lengths |
60mm (30/30) to 100mm (50/50); custom offset lengths available in 5mm increments |
ISO 9001 Manufacturing Tolerances |
|
Body & Plug Material |
Solid Extruded Brass (MS58 / CuZn40Pb2) |
High tensile strength, corrosion resistant |
|
Cam Material |
Sintered Steel / Hardened Stainless Steel (15 degree DIN Clutch) |
High torque resistance |
|
Pin Configuration |
6-Pin Precision Brass/Nickel-Silver Pin Tumbler System |
Anti-pick and anti-bump configurations |
|
Durability Grade |
Grade 6 (Minimum 100,000 test cycles) |
EN 1303:2015 |
|
Attack Resistance |
Grade 0 to Grade 2 (Optional anti-snap reinforcement bar, hardened drill-protection pins) |
EN 1303:2015 |
|
Finish Options |
Satin Nickel (SN), Polished Brass (PB), Satin Chrome (SC), PVD Black |
Salt Spray Testing > 96 Hours (ASTM B117) |
|
Key System Options |
Keyed Different (KD), Keyed Alike (KA), Master Key (MK), Construction Key Systems |
High-precision CNC key cutting |
Product Selection & Sizing Guide
Selecting the correct cylinder dimensions ensures operational clearance between the thumbturn, exterior keyhole, and door hardware escutcheon plates.
How to Measure a Euro Cylinder
• Dimension A (External): Measure from the center of the fixing screw hole to the outer edge of the exterior door face.
• Dimension B (Internal): Measure from the center of the fixing screw hole to the inner edge of the thumbturn side.
• Total Length: Length = A + B.
Available Length Configurations (Standard Stock Items)
• Standard Profiles: 30/30mm (60mm total), 35/35mm (70mm total), 40/40mm (80mm total).
• Offset Profiles: 30/40mm, 30/45mm, 35/45mm, 40/50mm.
Custom metric sizing available upon drawing approval for OEM door manufacturers.
Application & Compliance Assessment
Target Applications
• Commercial Exit Doors: Fire-rated emergency exit paths where internal thumbturn operation allows immediate evacuation without searching for a key.
• Multi-Family Residential Entrances: Apartment entry doors requiring restricted master-key access for facility managers and independent key access for residents.
• Aluminum & uPVC Profile Doors: Direct drop-in replacement for commercial storefronts and industrial partition doors utilizing DIN mortise locks.
Regulatory Compliance & Testing
• EN 1303:2015 Classification: Certified for mechanical durability, corrosion resistance, and key-related security.
• Fire Door Suitability: Compatible with fire-rated door assemblies tested to BS EN 1634-1 (up to 120-minute timber/steel ratings).
• Dimensional Interoperability: Conforms to DIN 18252 cam position and fixing screw placement, eliminating binding issues in multi-point lock housings.
Manufacturing Process & Quality Control
Material Processing & Machining
• Hot Forging & Extrusion: Cylinder bodies are extruded from high-purity brass billets (MS58) to eliminate internal porosity and structural micro-cracks.
• CNC Multi-Axis Milling: Keyway broaching and pin-chamber drilling maintained within a tolerance window of plus or minus 0.015 mm to ensure smooth key insertion and zero binding.
• Surface Treatment: Electroplated finishes applied with automated rack plating lines, ensuring uniform micro-layer thickness (Nickel >= 15 micrometers, Chrome >= 0.3 micrometers) for long-term abrasion resistance.
Quality Inspection Protocols
• Bitting Precision Check: Optical comparator inspection of key bitting depths and pin tolerances.
• Torque Testing: Cam torsion testing up to 15 Nm to verify structural integrity against forced rotation attacks.
• Cycle Testing: Automated pneumatic test rigs cycle each batch through 100,000 opening/closing rotations under operational load.
Supplier Verification for B2B Procurement
Manufacturing Capacity: Fully automated CNC assembly lines and pin-setting machinery yielding a stable monthly output of 150,000+ cylinders.
OEM/ODM Customization: In-house tool and die design supporting custom laser logo etching, proprietary keyway profiling, and specialized master-key charting.
Traceability: Laser-etched batch numbers on cylinder bodies linked directly to raw material mill test certificates and QA inspection logs.
Packaging & Logistics: Bulk industrial packaging (individual box or blister pack per specification) configured for palletized container shipping.
Frequently Asked Questions
Q: What is the standard lead time for bulk orders and custom-keyed master key systems?
A: Standard stock items ship within 7 to 10 business days. Custom keyed-alike or master-key batch production requires 15 to 25 business days, subject to order volume and key charting complexity.
Q: Can these cylinders be integrated into an existing master key system?
A: Yes. Provide your existing key bitting chart or pin code specifications. Our engineering team verifies compatibility with our 6-pin paracentric profile before production sample sign-off.
Q: What anti-attack features are integrated into the standard model?
A: Standard configurations feature hardened steel anti-drill pins in the outer body. Anti-snap reinforcement bars and break-secure sacrificial front cuts are available as configurable upgrades for high-security commercial specifications.
Q: What is the minimum order quantity (MOQ) for custom finishes or OEM laser branding?
A: The standard MOQ for custom finishes (such as PVD Black or Satin Chrome) and laser-etched client branding is 500 units per size/finish combination.
Q: How do you prevent tolerance mismatch with third-party mortise locks?
A: All cylinders are machined strictly to DIN 18252 dimensional standards, ensuring precise alignment with standard European mortise lock backsets, cam angles (15 degree offset), and fixing screw locations.