Find HS Code and trade information for lift support shocks, gas struts & assemblies

Lift Support Shocks, Gas Struts & Assemblies

Lift support shocks, commonly known as gas struts or gas springs, are mechanical devices used to support weight and control the rate of motion. They utilize compressed gas to provide force in a controlled manner, assisting in lifting, lowering, and damping movements. Assemblies often refer to complete units including the strut, end fittings, and sometimes mounting hardware.

Material

• Cylinder: Typically constructed from steel alloys, often carbon steel or stainless steel for corrosion resistance. Aluminum is used in lighter-duty applications.
• Piston Rod: Usually chrome-plated steel to resist corrosion and wear. Stainless steel options are available for harsher environments.
• Seals: Employ materials like Nitrile rubber (NBR), Viton (FKM), or PTFE (Teflon) to contain the compressed gas and maintain pressure.
• Gas: Nitrogen is the most common gas used due to its inertness and stability.
• End Fittings: Steel, aluminum, or other alloys, chosen based on the application's strength and environmental requirements.

Purpose

The primary purpose of lift support shocks is to:

• Provide lifting assistance: Reduce the force required to lift or open heavy objects.
• Control descent: Dampen the lowering speed, preventing sudden drops.
• Maintain position: Hold objects in a specific open or closed position.
• Improve safety: Prevent injury from falling objects or uncontrolled movements.

Function

Lift support shocks operate on the principle of compressed gas expansion.

• Compressed State: When compressed, the gas within the cylinder exerts force against the piston.
• Expansion & Force: As the cylinder extends, the gas expands, generating force that pushes the piston outward. The force is proportional to the gas pressure, piston area, and the amount of extension.
• Damping: A damping mechanism within the cylinder controls the speed of extension and compression, preventing bouncing or uncontrolled movement. This is often achieved through orifices or a dedicated damping valve.

Usage Scenarios

Lift support shocks are widely used in:

• Automotive: Hoods, trunks, tailgates, hatchbacks, and liftgates.
• Furniture: Cabinets, beds, and adjustable chairs.
• Marine: Hatches, access panels, and boat lids.
• Industrial Machinery: Access doors, covers, and positioning systems.
• Medical Equipment: Adjustable beds, chairs, and examination tables.
• Aerospace: Access panels and aircraft components.

Common Types

• Standard Gas Struts: Most common type, providing linear force throughout the stroke.
• Lockable Gas Struts: Contain a locking mechanism to hold the position at any point in the stroke.
• Adjustable Gas Struts: Allow for adjustment of the gas pressure, altering the force output.
• Stainless Steel Gas Struts: Designed for corrosive environments, offering superior durability.
• Heavy-Duty Gas Struts: Built with larger cylinders and stronger components for higher load capacities.
• Side-Rod Gas Struts: Feature a rod extending from the side of the cylinder, used in applications with limited space.
• End-Fitting Variations: Numerous end-fitting options (ball sockets, clevises, eyelets, etc.) are available to accommodate various mounting configurations.

Based on the provided information, the declared goods – lift support shocks, gas struts & assemblies – can be classified under the following HS codes:

• 8708.80.05.00: Parts and accessories of the motor vehicles of headings 8701 to 8705: Suspension systems and parts thereof (including shock absorbers): Suspension systems (including shock absorbers): For tractors suitable for agricultural use: Other.
  • 87: Chapter 87 covers Vehicles other than railway or tramway rolling stock, and parts and accessories thereof.
  • 80: Heading 80 specifically addresses Parts and accessories of the motor vehicles of headings 8701 to 8705.
  • 05: Subheading 05 narrows the scope to Suspension systems and parts thereof (including shock absorbers) for tractors suitable for agricultural use.
• 8708.80.16.00: Parts and accessories of the motor vehicles of headings 8701 to 8705: Suspension systems and parts thereof (including shock absorbers): Suspension systems (including shock absorbers): For other vehicles: Other.
  • 87: Chapter 87 covers Vehicles other than railway or tramway rolling stock, and parts and accessories thereof.
  • 80: Heading 80 specifically addresses Parts and accessories of the motor vehicles of headings 8701 to 8705.
  • 16: Subheading 16 narrows the scope to Suspension systems and parts thereof (including shock absorbers) for other vehicles.
• 8709.90.00.90: Works trucks, self-propelled, not fitted with lifting or handling equipment, of the type used in factories, warehouses, dock areas or airports for short distance transport of goods; tractors of the type used on railway station platforms; parts of the foregoing vehicles: Parts: Other.
  • 87: Chapter 87 covers Vehicles other than railway or tramway rolling stock, and parts and accessories thereof.
  • 09: Heading 09 specifically addresses Works trucks, self-propelled, not fitted with lifting or handling equipment, etc.
  • 90: Subheading 90 covers Parts of the foregoing vehicles.

Regarding HS code 8708.80.05.00 and 8708.80.16.00, please note that the classification depends on whether the vehicle the parts are intended for is a tractor suitable for agricultural use or another type of vehicle.

Regarding HS code 8709.90.00.90, it is important to confirm that the lift support shocks, gas struts & assemblies are indeed parts of works trucks or tractors of the type used on railway station platforms.