Free-Wheeling (Freerun) Cams in Emergency Panic Push Bars per EN 1125
Engineering Overview: Engineering guide on free-wheeling (freerun) cylinder cams for panic exit crash bars, ensuring instantaneous egress during emergency evacuations.
Technical & Engineering Specifications
| Cam Type | Free-Wheeling / Freerun 360° Panic Cam |
|---|---|
| Function | Cam spins freely to prevent blocking emergency exit bars |
| Standard | EN 1125 / EN 179 Panic Hardware Standards |
| Application | Auditoriums, School Exits, Cinema Panic Doors |
Emergency Panic Egress Kinematics
On emergency fire exit doors equipped with horizontal panic push bars (EN 1125), a standard fixed cam can block the internal latch retraction if left partially turned.
Free-Wheeling (Freerun) Cam Mechanism
- 360° Free Rotation: When the key is removed, the cam disengages from the core plug and spins freely.
- Instant Egress: Depressing the panic push bar rotates the internal lock mechanism without meeting any mechanical resistance from the cylinder cam.
Frequently Asked Engineering & Selection Questions
Q1: What is the key installation rule for this cylinder?
Engineering guide on free-wheeling (freerun) cylinder cams for panic exit crash bars, ensuring instantaneous egress during emergency evacuations.