Trapezoidal Warding Profiles: Anti-Picking Tension Tool Lockout
Engineering Overview: Engineering analysis of trapezoidal keyway warding profiles that physically block rotational tension wrenches and picking tools.
Technical & Engineering Specifications
| Security | EN 1303 Key Security Grade 6 |
|---|---|
| Tool Lockout | Causes tension wrenches to cam-out and slip |
| Manufacturing | Precision Multi-Pass Broaching Tolerances |
| Keyway Profile | Trapezoidal Undercut Paracentric Broaching |
Keyway Warding Defense
Lock pickers require insertion of a tension wrench to apply rotational torque. Trapezoidal Warding Profiles engineer the keyway slot with undercut angles.
Geometric Tool Lockout
- Trapezoidal Undercut: Side warding ribs feature a 15° inward taper rather than parallel walls.
- Tool Cam-Out: Flat tension tools slip and cam-out under torque, making it impossible to hold stable rotational tension without inserting the true key.
Frequently Asked Engineering & Selection Questions
Q1: What is a trapezoidal keyway profile?
A keyway with tapered, undercut side ribs that prevent lock picks and tension tools from gripping or holding rotational pressure.