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🔧 What Is a Demagnetizer? – A Quick Guide for Industrial Users
In industrial production and non-destructive testing (NDT), residual magnetism in workpieces is a common issue. It may lead to interference with subsequent processing, inaccurate measurements, or even product failure. That’s where a demagnetizer comes in.
✅ What Does a Demagnetizer Do?
A demagnetizer (also called a demagnetizing machine or degausser) is used to remove residual magnetic fields from metal parts after magnetic particle inspection (MPI), machining, or handling with magnetic tools.
It ensures that the parts meet quality standards and are safe for further use or assembly.
⚙️ How It Works
Demagnetization is typically achieved by:
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Applying an alternating magnetic field that gradually decreases in intensity;
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Passing the workpiece through a coil or near a demagnetizing field;
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Neutralizing residual magnetism to bring the magnetic field close to zero (usually <2 Gauss).
🧰 Common Applications
Demagnetizers are widely used in:
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Magnetic particle inspection (MPI) lines
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Gear shafts, crankshafts, bearings, and fasteners
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Precision machining industries
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Aerospace, automotive, shipbuilding, and tool manufacturing
🛠️ Types of Demagnetizers
| Type | Description | Suitable For |
|---|---|---|
| Tunnel Type | Parts pass through an enclosed coil | Small to medium-sized parts in batches |
| Platform Type | Fixed table with downward field | Flat or large components |
| Portable Type | Handheld unit for spot demag | On-site or irregular parts |
| Belt Conveyor Type | Fully automatic continuous demag | Production lines |
📌 Why You May Need One
If you’re noticing:
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Magnetic dust sticking to parts
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Problems in assembly due to magnetism
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Need for clean surfaces after MPI
→ A reliable demagnetizer is essential.
📦 Our Demagnetizer Solutions
At Nuke NDT, we offer:
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Standard and custom demagnetizing machines
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Automatic and manual options
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Adjustable field strength and time
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Global shipping and on-site support
Finding Demagnetizer supplier in China, need help choosing the right demagnetizer? Contact our team for a free consultation.
