Trapezoidal Inward-Tapered Warding Ribs (15-Degree Cam-Out Angle)
Engineering Overview: Engineering analysis of trapezoidal undercut keyway warding ribs causing rotational lock pick tension tools to slip and cam out under picking torque.
Technical & Engineering Specifications
| Standard | EN 1303 Key Security Grade 6 |
|---|---|
| Angle of Taper | 15-Degree Inward Warding Chamfer |
| Keyway Geometry | Trapezoidal Undercut Paracentric Broach |
| Security Function | Forces tension wrenches to slip and cam-out |
Tension Tool Lockout Geometry
Single-pin picking requires stable rotational tension. Trapezoidal Undercut Warding Ribs engineer the keyway walls with angled tapers.
Cam-Out Physics
- $15^\circ$ Inward Taper: Keyway side ribs feature a $15^\circ$ inward angle.
- Tool Slippage: When a flat tension wrench applies torque, the angled rib causes the tool to cam out and slip, making it impossible to hold stable picking tension.
Frequently Asked Engineering & Selection Questions
Q1: What anti-attack mechanism is detailed here?
Engineering analysis of trapezoidal undercut keyway warding ribs causing rotational lock pick tension tools to slip and cam out under picking torque.