Lockwood Synergy® 3571 Deadlock Mortice Locks

Lockwood Synergy® 3571 Deadlock Mortice Locks
Lockwood Synergy® 3571 Deadlock Mortice Locks
Lockwood Synergy® 3571 Deadlock Mortice Locks
Lockwood Synergy® 3571 Deadlock Mortice Locks

Suitable for heavy duty use in industrial and commercial buildings, institutions, clubs, schools, hospitals, hotels, and similar buildings.

3570 Series Cylinder Mortice Locks are made from quality materials to meet high durability and strength requirements.

Various deadlocking functions operated generally by a key outside and by a turnknob or key inside. Locked by key or turnknob when the door is closed.

For all deadlock functions specify primary lock (3571SC). This lock can then be easily adapted to suit function required.

Features of the 3571 Deadlock Mortice Locks

19mm stainless steel bolt.

Compatible with all Lockwood cylinder
escutcheons, turnknobs and plate furniture.


Case and Cover Plates

  • High purity zinc alloy material cases and stainless steel cover plates
  • Brass plates provided for plated finishes available in square and round end


  • 60mm standard backset
  • Extended backsets 89 and 127mm are available on application.

Latchbolts are 15mm, stainless steel. Deadlatching is achieved by an auxiliary stainless steel latchbolt. This auxiliary bolt retracts when the main latchbolt is withdrawn when the door is closed.

Deadbolts are 19mm, stainless steel.

High grade spring steel material, corrosion protected.

Cylinder Retaining Pin
Hard-drawn spring steel wire, corrosion protected.

Door Thickness
32mm to 50mm

Locksets to suit thicker doors are available on application.

Door Clearance
To ensure correct functioning of the deadlatching mechanism and security for all locks, the clearance between the door and the frame should be 3mm. However the deadlatching will operate up to 8mm door clearance.

Aluminium Doors
Aluminium door accessory packs and aluminium fix locks are available upon request. Specify SP3570-419 for mounting tabs accessory pack or 3572AFSC.

All 3570 Series Cylinder Mortice Locks conform with Level S2 (Physical Security) Australian Lock Standard (AS-4145.2-1993). Level S3 (Physical Security) is available upon request.

All 3570 Series Cylinder Mortice Locks conform with level D3 (Durability) Australian Lock Standard (AS 4145.2- 1993).

Fire Rating
Lockwood 3570 Series Mortice Locks have been successfully tested up to 4 hours (depending on type of doorset) on fire door assemblies in accordance with Australian Standard AS 1905.1- 2005, Part 1: Fire Resistant Doorsets.

Five pin tumbler mechanism. Standard Lockwood oval shaped brass cylinders and brass barrels.
Functions require the use of different cams and adaptors.


Standard Keying

  • Supplied individually keyed with two keys per lock
  • 78,000 key combinations
  • Key blank KB2015P

Restricted Special Keying

Lockwood locks can be keyed to a number of controlled and/or specially keyed systems. These range from legally protected keys to protect against unauthorised duplication, which can also include specially designed key systems such as master key systems, which allow for different levels of mechanical access control.

Standard Finishes

  • Chrome Plate CP
  • Satin Chrome Brushed SC
  • Polished Brass PB

Extended Cylinders
Extended cylinders are available for thicker doors.

Rebate kits to suit 13mm standard rebate are available.

Electric Strikes
Lockwood 3570 Series Mortice Locks are compatible with most electric strikes. Refer local sales office for further details.


3570 Series Primary Lock Cases

Description Part Number
60mm Standard Backset
3570 Nightlatch L3570SC
3571 Mortice Dedlock L3571SC
3572 Vestibule Lock L3572SC
3573 Sliding Door Deadlock L3573SC
3573 Sliding Door Deadlock with Latching Strike* L3573SCLS
3574 Passage Latch L3574SC
3579 Mortice Deadlock (SCEC Endorsed) L35791SC
3579 Vestibule Lock (SCEC Endorsed) L35792SC


NR: 89mm & 127mm backsets are available on request.
*The lock supplied with the latching strike has been specially modified to suit the latching strike.