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What is Linear Damper?

A linear damper, is a mechanical device used to absorb and dissipate kinetic energy for smooth deceleration.

It helps prevent sudden jolts and noise, and it significantly extends the lifespan of the product they’re installed on. They’re a common feature in engineering because they regulate motion, reduce vibrations, and provide damping in mechanical setups.

Linear dampers find applications in various sectors, including home appliances, office equipment, and automotive.

What are the different types of linear dampers?

Different application requires different damping curve. Linear damper’s efficient modular design offers quick development of customized solutions for various furniture and other applications.

Linear dampers are divided into single-hole overflow, multi-hole overflow, groove overflow, compound overflow and other modes in terms of overflow modes, and the damping curves are also different: as shown on the right.

Thanks to modular design, linear dampers can achieve push-in damping, pull-out damping, and two-way damping.

Damper Category

Spec	ΦCylinder	Stroke	Length/mm	ΦPiston rod	Force /N	Characteristic	Temperature	Material priston	Material cylinder	Remarks
JP-804-92P	Φ7.2	58	157				-20℃-60℃	Stainless Iron	POM
JP-804-82P	Φ7.2	48	137	2.5			-20℃-60℃	Stainless Iron	POM
PR-L223	Φ8	12	62		7~350	/	-20℃-60℃	SUS304	SUS304	Customizable length
JP-802-88	Φ8.4	50	165		/		-20℃-60℃	Stainless Iron	POM
JP-802-115	Φ8.4	88	229		/	/	-20℃-60℃	Stainless Iron	POM	/
JP-802-69P	Φ8.5	46	119	2.5	/	passive return	-20℃-60℃	Stainless Iron	POM
JP-802-60P	Φ8.5	35	104	2.5	/	passive return	-20℃-60℃	Stainless Iron	POM	/
JP-802-82P	Φ8.6	50	143.5	2.5	/	passive return	-20℃-60℃	Stainless Iron	POM
JP-802-82A	Φ8.6	45	145.5	2.3	/	active return	-20℃-60℃	Stainless Iron	POM
JP-802-49P	Φ8.6	24	78.5	2.3		passive return	-20℃-60℃	Stainless Iron	POM
JP-802-49A	Φ8.6	20	81.9	2.3		active return	-20℃-60℃	Stainless Iron	POM
JP-803-117P	Φ9	83.5	208	2.5		passive return	-20℃-60℃	Stainless Iron	POM
JP-803-140P	Φ9	100	253	2.5			-20℃-60℃	Stainless /iron	POM
JP-803-92A	Φ9.5	53	168	2.5		active return	-20℃-60℃	Stainless Iron	POM
JP-803-92P	Φ9.6	60	160	2.5		passive return	-20℃-60℃	Stainless Iron	POM
JP-801-108P	Φ9.8	78	193.5	2.3		passive return	-20℃-60℃	Stainless Iron	POM
PR-L202	Φ10	14			120-410N	active return	-20℃-120℃	SUS201	SUS304	Customizable length
PR-L208	Φ10	14	68		7~870N	active return	-20℃-60℃	SUS201	25#/Electro nickelling/sus316	Customizable length
JP-CA10	Φ10	57	15		100~300 N		-20℃-60℃	SUS304	POM
JP-801-115.5 (	Φ10	75	215				-20℃-60℃	Stainless Iron	POM
JP-801-100	Φ10	67	180				-20℃-60℃	Stainless Iron	POM
JP-CU038	Φ10	22.3	85.8				-20℃-60℃	Stainless Iron	POM
JP-801-50A	Φ10	22	80			active return	-20℃-60℃	Stainless Iron	POM
JP-801-77A	Φ10.2	38.5	115.5			active return	-20℃-60℃	Stainless Iron	POM
JP-801-82P	Φ10.5	52.5	147.6			passive return	-20℃-60℃	Stainless Iron	POM
JP-801-82A	(Φ10.5	45	150.5			active return	-20℃-60℃	Stainless Iron	POM
PR-L241	Φ12	10	58.5		200N-1200N	active return	-20℃-85℃	SUS304	Aluminium alloy	Customizable length
JP-CA1210	Φ12	10	72		100-300N		-10℃-50℃	SUS304	POM

How does a linear damper work?

When an object strikes the piston rod, impact force travels through the rod to the piston, moving it downward.

Hydraulic fluid compression, passing through the overflow hole, produces damping pressure, overflow hole size, oil viscosity, and impact speed collectively influence damper thrust for effective deceleration damping.

What factors affect damping performance?

Fluid Viscosity: The thickness of the damping fluid inside the damper impacts its ability to resist motion. Thicker fluids offer more resistance, resulting in stronger damping forces.
Temperature Sensitivity: Changes in temperature affect the viscosity of the damping fluid, thus influencing damping performance. Variations in temperature can lead to fluctuations in the fluid’s flow properties, altering damping behavior accordingly.
Piston Geometry: The size, shape, and surface features of the piston affect how the damping fluid flows within the damper, ultimately influencing damping performance. Optimizing piston design can improve damping efficiency and system stability.
Orifice Size and Configuration: The dimensions and arrangement of orifices through which the damping fluid flows play a critical role in regulating damping forces. Adjusting these parameters allows for precise control of damping characteristics to meet specific requirements.
Operational Velocity: The speed at which the damper operates impacts damping effectiveness. Higher velocities result in increased damping forces due to enhanced viscous action, leading to stronger damping effects.
Seal Integrity: Maintaining the integrity of seals and gaskets within the damper is essential for preventing fluid leakage and ensuring proper containment. Damaged or degraded seals can compromise damping performance over time by allowing fluid loss.

Linear damper Application

Linear damper is available for

linear motion
rotary motion

When the cover is rotated open, the rotating body rises, the slope climbs to the apex, and the linear damper piston rod extends – When the cover is rotated and closed, the rotating body descends, the ramp engages, and the linear damper piston rod presses the boss at the bottom of the housing. The piston rod is pressed in, creating a cushion.

Linear Motion

Rotary Motion

How Do I Choose a Linear Damper

Different impact speeds will cause the linear damper to output completely different damping thrust. Please select the type within a reasonable speed direction;

Before selecting the thrust type, please consult our engineers to confirm the weight of the impact object, impact speed, continuous thrust, total inertia and other parameters.

Can’t find the perfect match? We are happy to support you.

Get in Contact

FAQs About Linear Damper

1. What if linear damper stroke was compressed or extended exceed?

Please do not use the linear damper beyond the stroke, as it may cause damage to the damper.

2. In what environment that linear damper easy to fail.

Using it in a vacuum or oily environment may cause the damper to fail.

3. What will happen while linear damper work at a deflection angle

Please do not let the damper work at a deflection angle. The piston rod and seal may be damaged. Please add an external guide device.

4. What precautions should be taken when using linear dampers?

4.1 Installation and usage quantity: More than 2 dampers can be used in parallel to ensure the installation strength of the damper.

4.2 And the damping termination stop limit is designed on the outside; the damper cannot be used as a stopping device.

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