Lockwood 3540 Short Backset Mortice Deadlock Double Cylinder - Satin Chrome
The Lockwood 3540 Short Backset Mortice Deadlock Double Cylinder is designed for narrow stile door applications where standard backset locks cannot be used. It provides secure deadlocking functionality with key operation on both sides.
This lock is commonly used in commercial aluminium doors and sliding door systems, where space limitations require a short backset configuration. The swing bolt design ensures positive locking action and reliable operation in demanding environments.
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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
- Double cylinder operation with key access on both sides
- Swing bolt design for positive locking action
- Suitable for aluminium hinged and sliding doors
- Designed for commercial and architectural applications
- Heavy duty construction for high use environments
- Reliable locking performance in demanding conditions
Suitable Uses
- Aluminium framed commercial doors
- Narrow stile hinged doors
- Sliding door locking systems
- Retail, office and institutional buildings
- High security door applications
- Architectural glazing systems
Specifications
Dimensions
Item Code Family
Frequently Asked Questions
What is a short backset lock?
A short backset lock is designed for narrow door frames where standard lock depths cannot fit.
Can this be used on sliding doors?
Yes, it can be used on sliding doors when installed with compatible strike and mounting configuration.
Does this include cylinders?
This is a double cylinder configuration but cylinders may be supplied separately depending on setup.
Additional Information
- Commonly specified in Australian commercial aluminium door systems and shopfronts.
- Short backset design is essential for narrow stile profiles where standard locks will not fit.
- Double cylinder configuration improves security but may have compliance implications for egress doors.
- Incorrect strike selection or alignment can affect 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 Overview
Lockwood branded products are covered by manufacturer warranties issued by ASSA ABLOY Australia Pty Ltd. Warranty periods vary depending on product type, mechanical components, electrical elements, and finish category.
This overview summarises the structure of Lockwood warranty coverage. Full terms, exclusions and claim procedures are set out in the official Lockwood Warranty document.
Warranty Periods 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.
- Decorative finishes including 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 will naturally age and change appearance over time. This is not considered a defect.
- Tea staining of stainless steel is not covered where cleaning and maintenance have not been followed.
What the Warranty Covers
- Defects in material and workmanship during the applicable warranty period.
- Assessment by ASSA ABLOY to determine repair, replacement with the same or closest equivalent product, or refund of purchase price.
Common 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.
Warranty Claim Process
- Retain proof of original purchase.
- Return the product through the original place of purchase where applicable.
- If claiming directly, obtain a case number before returning goods.
- Products must be securely packed and clearly identified.
- Warranty assessment determines repair, replacement or refund.
Australian Consumer Law
Lockwood warranties operate in addition to rights available under the Australian Consumer Law. Goods come with guarantees that cannot be excluded. Customers may be entitled to a replacement or refund for a major failure and compensation for reasonably foreseeable loss or damage.
Where a product fails to meet acceptable quality standards and the failure does not amount to a major failure, the customer is entitled to repair or replacement.
