Chubb Bolt Thrower Curtain to suit 3G114 3G115 3K74 3K75 Mortice Locks
The Chubb bolt thrower curtain (internal key curtain) is a mechanical spare part used within compatible Chubb mortice lock bodies. It transmits key rotation into linear bolt movement and is required for correct operation of the locking mechanism.
This part is commonly replaced during lock servicing or repair when the original curtain has worn or no longer reliably actuates the bolt.
Key Features
- Replacement internal bolt thrower / key curtain for selected Chubb mortice locks.
- Restores correct engagement between key rotation and bolt movement.
- Mechanical spare part for lock servicing and repair.
Specifications
- Item Code: CH3G114CURT
- Brand: Chubb
- Product Type: Bolt thrower / key curtain (spare part)
- Compatibility: Chubb mortice locks 3G114, 3G115, 3K74, 3K75
Suitable Uses
- Servicing or repairing Chubb mortice locks where the existing curtain is worn or damaged.
- Restoring reliable bolt actuation when key rotation fails to fully extend or retract the bolt.
Chubb Mortice Lock Bolt Throwers – Item Code Family
Frequently Asked Questions
- What is a bolt thrower or key curtain?
It is the internal interface that converts key rotation into linear motion of the mortice lock bolt. - Can I use this curtain in all Chubb mortice locks?
No. This part is only compatible with the specified Chubb models (3G114, 3G115, 3K74, 3K75). - Is this part visible when the lock is installed?
No. The key curtain is an internal mechanical component housed within the lock body.
Additional Information
- Key curtains are model-specific and generally not interchangeable between different Chubb lock families.
- Wear in the curtain can cause incomplete bolt travel or key rotation issues.
- Lock disassembly is typically required to replace this component; professional locksmith handling is recommended.
