Technical Specifications:

• Type: Hydraulic telescopic damper
• Stroke Length: 55mm
• Damping Force: 80N to 150N (variable with velocity)
• Mounting: Top — M8 bolt to chassis; Bottom — M8 bolt to tub bracket
• Overall Length (Extended): 215mm
• Overall Length (Compressed): 160mm
• Operating Temperature: -10°C to +80°C
• Rated Load: 70kg static + 30kg dynamic

Functional Features:

• Hydraulic damping absorbs vertical and lateral vibration
• Gas-charged piston prevents cavitation at high speed
• Rubber bushings at both mounting points isolate chassis vibration
• Corrosion-resistant body for humid environments

Performance Parameters:

• Natural Frequency: < 8 Hz (tuned below drum operating frequency)
• Maximum Damping Coefficient: 1200 Ns/m
• Fatigue Life: ≥ 50,000 cycles at rated load
• Noise Reduction: Reduces vibration transmission by ≥ 85%
• IP Rating: IP54 — dust and splash protected

Material Composition:

• Outer Cylinder: Cold-rolled steel with zinc-nickel plating
• Inner Piston Rod: Hardened chrome-plated steel (HRC 55)
• Seals: HNBR (Hydrogenated Nitrile Butadiene Rubber)
• Hydraulic Fluid: Silicone-based damping oil
• Mounting Bushings: Natural rubber with metal insert

Structural Features:

• Telescopic two-tube design with inner and outer cylinders
• Threaded body for ride-height adjustment (±5mm)
• Rubber-metal bonded bushings at top and bottom
• Dust seal on piston rod to prevent contamination

Working Principle:
During spin, the drum generates centrifugal forces up to 300G. The shock absorber converts this kinetic energy into heat via hydraulic fluid shear as the piston moves through the damping oil. The gas charge in the inner tube maintains consistent pressure and prevents oil foaming (cavitation). The result is controlled, damped movement of the tub within the chassis.

Key Advantages:

• Dramatically reduces vibration and walking tendency
• Adjustable ride height allows leveling on uneven floors
• Hydraulic damping superior to spring-only systems
• Long service life with sealed, maintenance-free design

Applicable Industries:

• Washing machine OEM manufacturing
• Appliance aftermarket parts
• Professional installation and servicing

Installation Requirements:

• Install in pairs (front-left and front-right) for balanced support
• Torque mounting bolts to 10 Nm ± 1 Nm
• Adjust ride height so machine is level ± 1mm
• Ensure no contact between damper body and any sharp edges

Usage Precautions:

• Always replace in matched pairs — never replace single unit
• Verify machine is level before first use after installation
• Do not disassemble — unit is sealed and non-serviceable
• If oil leakage is observed, replace immediately