3G112 Mk1

Purpose

To provide secure deadlocking of swinging 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 3G112 Mark 1 is a mortice deadlock of robust construction based on the Chubb Locks Custodial Services small mortice footprint. The mechanical deadbolt provides an overall throw of 38mm which comprises an initial throw of 19mm and a second throw of a further 19mm.

The lock is designed so that master key will perform both the first and second throw, while the servant key will operate the first throw only.

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.

The lock is operable from both sides and the escutcheon is designed to allow only the correct key profile being inserted into the lock.

Secure locking is achieved as follows:

Servant Key – Operates first throw only
Locking is achieved by inserting the servant key into the dished keyhole and rotating fully, this action will extend the bolt to its first position.
Unlocking is achieved by inserting the servant key into the dished keyhole and rotating fully, this action will withdraw the bolt.

Note: The Servant key will not operate the second (master) throw.

Master Key
– Operates first and second throw
Locking, by inserting the master key into the offset keyhole and rotating fully the bolt can be thrown to its first position. A further rotation of the key will throw the bolt to its second position, preventing the servant key operating the lock.
Unlocking is achieved by inserting the master key into the offset keyhole and rotating once. This action will withdraw the bolt to either enable operation under servant key or by a further rotation to fully withdraw the bolt to unlock.

Note the Master key will operate both throws.

Features

Composite deadbolt, with carbide anti-cutting rollers and 38mm throw.
16 lever highly durable mechanism.
Independent Servant and Master actions.
Low friction key journals.
Lever arrangement designed to provide extended product life.
Dedicated key profiles operates Mark 1&2 group of locks only.
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 30 minutes.
End load 9 KN.
Side Load 13.5 KN.
Salt Spray 98 hours BS EN 1670:1998.

Additional features

Suitable for external and internal use.
Range of fixings including reinforcing plates and locking plates.
Available in alternative furniture finishes on request.
Can be keyed with 3M56 Mark 1 Hook Bolt.
Lock interchangeable with 3G317.
Gate boxes for steel door applications recommended.
Escutcheon trim plates supplied for wooden door variants as standard.
Rebate kit available for wooden door applications
Monitored versions available with micro-switch sensing of bolt position.
Single sided version available on request.
Servant key action only, version available on request.
Master key action only, version available on request.

Materials and finishes

Lock case - carbon steel electro-plated.
Bolt – stainless steel and brass composite.
Escutcheons – silica brass.
Keys – hardened steel.
Levers and springs – brass / phosphor bronze.

Dimensions and Weights

Lockcase Depth (total) 171.5mm
Lockcase Length 114.2mm
Lockcase Width 21.0mm

Weight (lock only) 2.1kg

Total Range

NOTE: 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.