Soft Close Lid Struts Pair – 400mm 300N – Controlled Closing Lid Support – 4x L Brackets
SOFT CLOSE LID SYSTEM
Designed specifically for controlled lid movement, this 400mm 300N soft-close lid strut set provides smooth assisted opening and a dampened closing action for medium to heavy lids. Unlike standard lift supports, this configuration is engineered to reduce sudden lid drops while maintaining stable hold-open positioning.
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The struts work together to create a balanced lifting force that supports the lid weight throughout the opening cycle while preventing harsh closing impacts that can damage hinges or frames.
Product Engineering Overview
This soft-close configuration is ideal for applications where lids are opened frequently and require a more controlled movement profile. The 400mm extended length provides increased travel distance, making it suitable for deeper storage units and furniture lids.
- Smooth assisted opening motion
- Controlled closing behaviour
- Reduced stress on hinges and lid frames
- Stable hold-open position during use
Technical Specification
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Force Output: 300N per strut
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Total Pair Support: 600N combined force
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Extended Length: 400mm
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Stroke Travel: 150mm
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Connection Type: 10mm Ball Socket
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Mounting Hardware: 4x Steel L Brackets
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Installation Format: Pair installation (left and right)
Recommended Lid Size & Weight
Correct strut selection is important to achieve optimal soft-close behaviour.
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Recommended Lid Depth: 500–800mm
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Typical Lid Weight Range: 30–54kg (lid panel only)
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Installation: one strut per side
Using a force rating that is too high may cause the lid to open too aggressively, while insufficient force may not hold the lid open properly.
Mounting Hardware Included
This kit includes four reinforced L mounting brackets designed to create a secure structural connection between the strut and the storage unit frame.
- Strong steel construction
- Designed for wood, composite or plastic structures
- Allows stable mounting alignment for deeper lids
- Improves long-term durability of the lid support system
Installation Guidance
For the most effective soft close behaviour, the correct positioning of the brackets is essential.
- Mount the upper bracket on the lid panel approximately 20–30% from the hinge
- Install the lower bracket on the internal side wall of the box
- Ensure the strut remains slightly compressed when the lid is fully closed
- Install one strut on each side for a balanced lifting force
Proper geometry ensures smooth operation and extends the lifespan of the struts and lid hinges.
Choosing the Correct Force
Soft close lid systems perform best when the gas strut force closely matches the lid weight.
- Lids under 30kg may require a lower force rating
- Lids heavier than 54kg may need stronger struts
- Deeper lids may require longer strut lengths
Always calculate the weight of the lid only. The strut does not support the contents of the box.
Typical Applications
- Toy boxes
- Storage chests
- Bench seating with storage
- Tool storage boxes
- Furniture lids requiring controlled closing
AUTORCE Quality Commitment
- Tested lifting performance
- Durable steel construction
- Fast UK dispatch
- Responsive customer support
Upgrade your storage lid with a reliable soft-close support system designed for smoother operation and improved safety.
