Guide to Cylinder Lock: Technical Specs & Dimensions for Industrial Use
Quarter-turn cylinder cam locks provide rapid access and secure closure for mailboxes, self-service kiosks, server racks, and smaller electrical panels. Precision in cylinder lock dimensions, specifically the mounting cut-out and the cam offset, ensures exact compression against the frame without rattling.
The industry-standard mounting profile is a 22.2mm diameter hole with a 20.2mm flat side (Double D or Single D cut-out). This anti-rotation geometry prevents the lock body from spinning when high torque is applied by the user.
| Specification | Technical Parameter | Tolerance / Standard | | :--- | :--- | :--- | | **Material** | Zinc Alloy Housing & Cylinder | GB/T 13818 | | **Mounting Cut-out** | 22.2 mm x 20.2 mm (Double D) | ± 0.1 mm | | **Cam Offset Range** | 0 mm to 35 mm | Configurable | | **Panel Thickness** | 1.0 mm - 5.0 mm | Hex nut fastened | | **Rotation Angle** | 90° (Quarter-turn) | Clockwise or Counter | | **Key Extraction** | Locked & Unlocked positions | Specified per order |Mingyi Lock operates an advanced CNC machining facility to control key pin tolerances within ±0.02mm, allowing us to build robust Master Key (MK) and Keyed Alike (KA) systems for large industrial infrastructure projects.
Main Technical Specifications of Cylinder Locks
Key parameters for mechanical security and panel fitting
Standardized Cut-out
The 22.2x20.2mm dimensions eliminate rotation under force, ensuring the lock remains permanently fixed to the sheet metal panel.
Custom Cam Offsets
The steel cam (tongue) can be straight (0mm offset) or bent (up to 35mm) to match the exact distance between the door and the interior frame.
Keyed Alike (KA) Systems
For data centers or vehicle fleets, all cylinders are pinned to accept a single key code, streamlining maintenance access.
Master Key (MK) Hierarchies
Complex pinning permits individual keys for specific locks, while a Master Key opens the entire batch. Cross-opening rate is controlled below 0.1%.
Thread Fastening
M22 threading with a brass or zinc alloy hex nut securely fastens the housing to doors ranging from 1.0mm to 5.0mm thick.
Ensuring Security and Longevity
Mechanical Fatigue Resistance
The internal brass tumblers and springs are tested for 50,000 insertion and rotation cycles to guarantee a long service life without key jamming.
Corrosion Protection
The zinc alloy housing undergoes >96 hours of NSS salt spray testing, maintaining a smooth chrome or powder-coated finish in humid environments.
Anti-Drill Components
High-security variants include hardened steel pins and reinforced faceplates to resist physical drilling and forced entry attempts.
Applications of Cylinder Locks
Quarter-turn cylinder locks are standard hardware for commercial mailboxes, smart parcel lockers, arcade machines, ATMs, self-service kiosks, and rack-mount server enclosures where compact security is required.
Custom OEM Tolerances
Cam Customization
We die-cut and bend steel cams to your exact offset specifications, ensuring precise compression without requiring spacer washers.
Key Bitting Control
CNC milling dictates key cuts with ±0.02mm accuracy, supporting over 2,000 unique key combinations per batch.
Thread Precision
M22 housing threads are machined to prevent cross-threading during high-speed pneumatic assembly on OEM production lines.
Mingyi Lock Cylinder Manufacturing
Mingyi Lock supplies millions of cylinder cam locks globally to enclosure and locker manufacturers. We manage the entire production process from zinc die-casting and electroplating to precision cylinder pinning.
Submit your cam offset dimensions and keying requirements (KA/KD/MK) to receive a technical evaluation and wholesale pricing quote.
FAQ
01.What does a 22.2x20.2mm Double D cut-out mean?
02.How do I calculate the correct cam offset?
03.What is the difference between Keyed Alike and Master Keyed?
04.Can the key be removed in the unlocked position?
05.What is the wholesale MOQ for custom cylinder locks?
