Lockwood 3540 Short Backset Mortice Deadlock Cylinder & Cylinder Turn - Satin Chrome
The Lockwood 3540 Short Backset Mortice Deadlock Cylinder and Cylinder Turn is designed for narrow stile door applications requiring secure external key operation combined with internal turn functionality. This configuration allows convenient internal locking and unlocking without the need for a key.
Commonly specified for aluminium framed commercial doors, this lock provides a reliable deadlocking function while accommodating space-restricted installations where standard backset locks cannot be used.
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Non-Returnable Item: This product is a special order and is not returnable.
Key Features
- Short backset mortice deadlock for narrow stile doors
- External key cylinder with internal turn for convenience
- Positive action swing bolt for secure locking
- Allows internal locking without key access
- Suitable for aluminium hinged and sliding doors
- Designed for heavy duty commercial applications
- Robust construction for long service life
Suitable Uses
- Commercial aluminium framed doors
- Narrow stile hinged doors
- Sliding door locking systems
- Office and retail environments
- Architectural glazing systems
- Applications requiring internal turn operation
Specifications
Item Code Family
Dimensions
Frequently Asked Questions
What is the benefit of a cylinder turn?
It allows internal locking and unlocking without needing a key, improving convenience.
Is this suitable for narrow aluminium doors?
Yes, it is specifically designed for short backset applications such as narrow stile doors.
Can this be used on sliding doors?
Yes, it is commonly used where the lock is mounted to the jamb and engages a strike on the door.
Additional Information
- Widely used in Australian commercial aluminium door systems.
- Short backset locks are essential for narrow profiles where standard locks will not fit.
- Cylinder and turn configuration is commonly selected for internal convenience.
- Correct strike alignment is critical for smooth locking performance.
Lockwood branded products purchased new in Australia from authorised resellers are covered against defects in materials and workmanship for:
- Mechanical components: 25 years
- Electrical and electronic components: 2 years (excluding batteries)
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Lockwood Warranty
Lockwood branded products are covered by manufacturer warranties issued by ASSA ABLOY Australia Pty Ltd. Warranty periods vary by product type, with separate cover for mechanical components, electrical and electronic parts, keys, and finishes.
The summary below sets out the standard warranty structure. All warranty claims are handled by Terry's Tradies Pty Ltd and its associated websites, trading names, and subsidiaries. Full terms and exclusions are set out in the official Lockwood warranty document linked at the base of this page.
Warranty Summary
Finish Coverage Guide
- Everbrass finishes: up to 25 years against corrosion, tarnishing and discolouration.
- Stainless steel, polished stainless steel, chrome plating and anodised finishes: typically up to 10 years.
- PVD and VIVID finishes: typically up to 10 years.
- Symmetry range finishes: typically up to 5 years.
- Decorative finishes (Antique Copper, Architectural Bronze, Oil Rubbed Bronze, Aged Brass, Polished Brass, Satin Brass and related variants): typically up to 2 years against corrosion.
- Unlacquered brass finishes naturally age and change appearance over time. This is not considered a defect.
- Tea staining of stainless steel is not covered where the required cleaning and maintenance have not been followed.
How to Make a Claim
- Contact Terry's Tradies Pty Ltd and its associated websites, trading names, and subsidiaries with your proof of original purchase.
- Keep the product securely packed and clearly identified, ready for assessment.
- Where a claim is escalated to the manufacturer, ASSA ABLOY may issue a case number before goods are returned.
- ASSA ABLOY assesses the claim and determines repair, replacement with the same or closest equivalent product, or refund of the purchase price.
Exclusions
- Normal wear and tear.
- Misuse, abuse, accidental damage or use outside published specifications.
- Improper maintenance or failure to follow care instructions.
- Unauthorised modification, repair or use of non-genuine parts.
- Exposure to corrosive environments including coastal air, salt spray, chemicals or pollution.
- Removal, refitment or associated labour charges.
- Products not originally sold in Australia through authorised channels.
These manufacturer warranties apply in addition to your rights under the Australian Consumer Law. Our goods come with guarantees that cannot be excluded under the ACL. You are entitled to a replacement or refund for a major failure and to compensation for any other reasonably foreseeable loss or damage. Where a failure does not amount to a major failure, you are entitled to have the goods repaired or replaced.
