Lockwood Synergy 3573 Sliding Door Mortice Deadlock | 60mm Backset | Satin Chrome


Available on back-order

This lock is commonly bought with oval cylinders, turn snibs and matching cover plates as well. A typical setup has been selected for convenience however you can amend the quantities to suit your specifications.

x: Special order - NO RETURNS

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 key outside and by turnknob or key inside. Locked by key or turnknob when door is closed.

For all sliding door deadlock functions specify primary lock (3573SC). This lock can then be easily adapted to suit function required.



  • Deadlock.

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 This auxiliary bolt retracts when the main latchbolt is withdrawn when the door is closed.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.

Line Drawing

3573 Line Drawing