3M56 Mark 2 - Morticed Hookbolt Lock – Double Action

Application

Purpose

To provide secure deadlocking of sliding doors or gates where an enhanced level of security is necessary. This lock is specifically designed for very high use applications; typically securing perimeter doors and main access routes.

Overview

The 3M56 Mark 2 is a mortice hook bolt lock of robust construction based on the Chubb Locks Custodial Services small mortice footprint. Twin locking laminated and hardened hooks are used to provide positive engagement in the frame with maximum strength.

The lock provides two independent throws of the anchor bolt where each throw is operated by a different key profile. The keys are designed so that neither key will perform the function of the other key.

The lock is operable from both sides with separate key holes for each key type. The escutcheon is designed to prevent the wrong key being inserted into the lock.

Secure locking is achieved by two independent keys:

Singles Key - Operates first throw only

  • Locking is achieved by inserting the singles key into the dished keyhole and rotating fully, this action will extend the anchor bolt to expand the reinforced hooks to their fully thrown position.
  • Unlocking is achieved by inserting the singles key into the dished keyhole and rotating fully, this action will withdraw the anchor bolt and retract the reinforced hooks to their rest position.
  • Note the Singles key will not operate the second (Double) throw.

Doubles Key - Operates second throw only

  • Locking, by inserting the Doubles key into the offset keyhole and rotating fully the anchor bolt can be thrown to its second position, preventing the Singles key operating the lock.
  • Note: the use of the Doubles key does not engage the hooks any further.
  • Unlocking is achieved by inserting the Doubles key into the offset keyhole and rotating fully, this action will withdraw the anchor bolt to its first position to enable operation under Singles key.
  • Note the Doubles key will not operate servant throw.

Specification

Features

  • Laminated and hardened hooks to resist cutting.
  • Reinforcing bolts to resist forced attack.
  • 16 lever highly durable mechanism.
  • Independent Single and Double actions.
  • Low friction key journals.
  • Lever arrangement designed to provide extended product life.
  • Dedicated key profiles.
  • Escutcheon designed to give positive key alignment.
  • Security fixings to prevent unauthorised removal.

Performance

  • Lock tested to a minimum of 500,000 key operations.
  • Saw attack 10 minutes
  • End load 13.5 kN
  • Pull test load 13.5 kN

Additional Features

  • Suitable for external and internal use.
  • Specially designed forend and fascia locking plates.
  • Available in alternative furniture finishes on request.
  • Can be keyed with 3G112 Mark 2 Deadbolt
  • Gate boxes for steel door applications recommended.
  • Escutcheon trim plates supplied for wooden door variants as standard.
  • Monitored versions available with micro-switch sensing of bolt position.
  • Single sided version available on request.
  • Singles key action only, version available on request.

Total Range

  • The lock is not handed, however for use on steel doors the short forend version should be ordered and for wooden doors the long forend version is recommended.
  • NOTE: CLCS recommend this lock is used in conjunction with a wooden door 54mm thick. Please contact CLCS for guidance if alternative wooden door thicknesses are required.
  • Fully dimensioned customer drawings are available on request to assist with door preparation.

Dimensions & Weights

Lockcase depth (total) 171.5mm
Lockcase length 141.2mm
Lockcase width 21mm
Weight (lock only) 3kg

 

Finish

  • Lock case - carbon steel electro-plated.
  • Anchor bolt - stainless steel and carbon steel composite.
  • Hook bolts - hardened steel.
  • Escutcheons - silica brass
  • Keys - hardened steel
  • Levers and springs - brass / phosphor bronze

Standards