Hardened Steel Keyway Broach Inserts: Preventing Key Slot Widening Attacks
Engineering Overview: Technical analysis of hardened tool steel inserts embedded around the keyway opening to resist cold-chisel slot widening and torque bars.
Technical & Engineering Specifications
| Hardness | 62 - 64 HRC |
|---|---|
| Placement | Front 5 mm Keyway Entry Bulkhead |
| Armor Type | Hardened Tool Steel Keyway Broach Insert |
| Protection | Resists slot widening, cold chisels, and torque bars |
Anti-Vandalism Keyway Shielding
Vandals and burglars drive hardened steel wedges into keyways to widen the slot and bypass warding ribs.
Hardened Steel Broach Armor
- Insert Collar: A case-hardened steel insert (62 HRC) is pressed permanently into the front 5 mm of the keyway opening.
- Deformation Resistance: Prevents keyway slot expansion under heavy chisel blows or high-torque turning tools.
Frequently Asked Engineering & Selection Questions
Q1: Why are steel broach inserts placed at the keyway opening?
They prevent intruders from hammering steel wedges into the keyway to pry open the key slot.