Magnetic Dampening Springs for Washing Machine

I designed these magnetically preloaded dampening springs to reduce vibration and improve stability in my washing machine. The system uses repelling permanent magnets embedded inside a solid 3D-printed housing to create a contactless preload and progressive damping effect.

🔧 How It Works

Each dampener contains two 12 × 12 × 12 mm permanent magnets installed in the center of the print (Fig. A).

• The magnets are mounted with the same polarity facing each other

• This causes them to repel

• The repelling force creates a magnetic spring effect

• The 3D-printed body transfers the force into the machine frame

As shown in the animation (Fig. B), the leads of the 3D print experience shearing forces under load. The design was tested and optimized to withstand a washing machine load of up to 80 kg.

⚙ Print Settings (IMPORTANT)

This is a load-bearing functional part. Proper print settings are essential:

• Solid infill (100%)

• Increased line width for stronger layer bonding

• Ensure excellent layer adhesion

• Use a material with good mechanical strength (e.g., PETG, ABS, ASA, or stronger)

• Print orientation should minimize shear stress across layer lines

Do NOT use low infill — structural failure may occur.

🧲 Magnet Installation

• Use 12 × 12 × 12 mm permanent magnets

• Insert magnets into the central cavity

• Ensure same polarity faces inward (repelling configuration)

• Secure magnets properly (press-fit or adhesive if needed)

• Double-check polarity before final assembly

⚠ Warning: Strong magnets can snap together with high force. Handle carefully.

🧪 Testing & Load Rating

• Designed and tested for 80 kg washing machine load

• Optimized to handle dynamic vibration and shear forces

• Tested under real washing conditions

Use at your own risk. Always verify compatibility with your machine.

📦 Why Magnetic Preload?

• No metal springs required

• Progressive resistance

• Reduced mechanical wear

• Quiet operation

• Compact design