3F11/3F12 - Motorised Slam Action Lock



To provide secure locking of swinging doors or gates that can be unlocked from a remote location using third party security management systems (SMS) or by conventional key control. Designed to enable key and electric operation from one (3F11) or both (3F12) sides of the door.


The 3F11/3F12 are mortice locks of robust construction based on the Chubb Locks Custodial Services large mortice footprint. The locks are designed to deadlock automatically and to be unlocked electrically with bolt withdrawal by a motorised mechanism.



  • Electric Operation - Remote switch activates the locking solenoid and the locking dead bolt is withdrawn by the motor. When fully withdrawn the locking deadbolt is latched in position ready for the relocking operation.
  • Mechanical Operation - Locking mechanism is operated by a mechanical key that lifts the locking solenoid and withdraws the locking dead bolt. When fully withdrawn the locking dead bolt is latched in position ready for the relocking operation.


  • The lock automatically deadlocks when the door/gate is closed.

Standard Features

  • Solid Case Technology; Lock case machined from single piece carbon steel block.
  • Heavy duty gear and motor designed to operate under high load.
  • Steel main bolt with tungsten carbide anti cut rollers.
  • Solenoid electric locking latch.
  • 5-detainer key override mechanism.
  • Lock provides status monitoring of critical functions.
  • Integral baffle arrangements to resist manipulation and interference via the keyhole.
  • Dedicated key profile operates 3F11 / 3F12 group of locks only.


  • Mechanical locking mechanism tested to a minimum of 100,000 operations.
  • Motor/gearbox tested to a minimum of 1,000,000 cycles.
  • Solenoid locking unit tested to a minimum of 1,000,000 cycles.
  • Solenoid arrangement designed to operate at +/-10% of 24V DC regulated supply.
  • Nominal operating current 500mA.
  • End load 8.0 kN
  • Side Load 13.5 kN

Additional Items

  • Outer steel case (Gatebox) for use when fitted to a steel door
  • Locking plate (Keep)
  • Door cable (to connect the lock to door header / junction box terminations)
  • Keys - silica brass (ordered separately to the lock)

Dimensions & Weights (Approx)

Case Height207mm
Case Length238mm
Case Thickness29mm
Bolt Throw32mm
Bolt Depth45mm
Bolt Thickness22mm
Weight (lock only approx)10.5kg


Dimensioned customer drawings are available upon request.


  • Lock case - carbon steel electro-plated.
  • Main bolts - carbon steel electro-plated.
  • Main bolt follower high tensile brass.
  • Escutcheons - Silica brass.
  • Detainers and springs - Brass / phosphor Bronze.