Tunneling Magnetic Component
隧道磁
The tunneling magnetic component is an innovative magnetic device whose unique magnetic-circuit design concentrates a powerful magnetic field precisely at the centre of the tunnel cavity. Material passing through the tunnel is exposed to a high, uniform, and stable field — ideal for processes that require precise control of the magnetic-field environment.
AIC Engineering designs tunnel magnets with FEA-optimised yoke geometry and rare-earth magnet arrays that focus flux into the tunnel bore while minimising stray field outside. The result is high field concentration and strengthening in the working region, with uniform and stable distribution along the flow path.
Typical uses include ferrous tramp-iron removal from granular and powdered materials, magnetic-field treatment of process fluids, and laboratory field-exposure setups. Bore size, field strength, and flow-path length are configured to your material and throughput.
Key Features
Centre-Focused Field
Unique magnetic-circuit design concentrates the field at the tunnel centre — high flux density in the working region.
Uniform & Stable
Field distribution is uniform and stable along the flow path — consistent treatment of passing material.
Low Stray Field
Yoke geometry minimises field outside the tunnel — safe installation near sensitive equipment.
Rare-Earth Array
NdFeB magnet arrays with FEA-optimised yoke for high field strength in a compact envelope.
Configuration Options
Built to order — send bore size, field-strength target, and throughput. Representative configurations below.
| Configuration | Description | Typical Use |
|---|---|---|
| Inline Tunnel Separator | Cylindrical tunnel in a process line; ferrous particles captured as material flows through. | Granular & powdered material tramp-iron removal. |
| High-Field Array | Rare-earth magnet array tuned for peak field at bore centre. | Fine / weakly magnetic particle capture. |
| Fluid Treatment Tunnel | Tunnel bore sized for fluid flow; uniform field exposure along path. | Magnetic-field treatment of process fluids. |
| Laboratory Field Cell | Compact, characterised tunnel for controlled field-exposure experiments. | R&D, materials research, calibration. |
| Multi-Stage Tunnel | Series of tunnel stages with increasing field for graded separation. | Multi-fraction magnetic separation. |
| Custom Tunnel | Customer-defined bore, length, and port interface — built to print. | OEM process-line integration. |
Configurable Parameters
No fixed catalogue grades — each tunnel magnet is designed to your field and throughput specification. Typical ranges below.
| Parameter | Typical Range | Notes |
|---|---|---|
| Bore Field | 0.3 – 1.5 T | Peak field at tunnel centre; FEA-verified. |
| Bore Diameter | 20 – 300 mm | Per material flow or pipe size. |
| Active Length | 50 – 600 mm | Longer length → longer field exposure. |
| Magnet Material | NdFeB (N42–N52) | SmCo option for elevated temperature. |
| Yoke Material | Mild steel / Soft iron | Optimised to focus flux into bore. |
| Operating Temp. | −40 to 150 °C | Grade and construction dependent. |
| Throughput | Process-dependent | Bore size and length sized to flow. |
Values are typical design ranges — confirmed field, dimensions, and lead time are provided per quotation after magnetic-circuit review.
Design & Manufacturing
FEA magnetic-circuit design first, then yoke machining, magnet array build, field mapping, and bore verification.
- Bore field & throughput specification
- FEA yoke and magnet-array optimisation
- Stray-field and field-uniformity check
- Magnet grade and bore geometry fixed
- Yoke and housing CNC machining
- Rare-earth magnet array bonding
- Pulse magnetisation to specified pattern
- Bore surface and port finishing
- Bore-centre field-strength mapping
- Field uniformity along flow path
- Stray-field check outside tunnel
- Protective packaging
Typical Applications
Need a Custom Tunneling Magnetic Component?
Send your bore size, field-strength target, and throughput — our engineers will simulate the magnetic circuit and propose a tunnel-magnet design.
Discuss Custom RequirementsFrequently Asked Questions
Answers to common questions about our magnets, customisation, ordering and shipping.
- What is a tunneling magnetic component? +
- A tunnel magnet is a device whose magnetic-circuit design concentrates a powerful, uniform, and stable field at the centre of the tunnel bore, with minimal stray field outside — for precise control of the field environment.
- What is the tunnel bore used for? +
- Material or fluid flowing through the bore is exposed to the concentrated field — used for ferrous tramp-iron removal, magnetic-field treatment of process fluids, and laboratory field-exposure setups.
- What bore field strength can be achieved? +
- Typical bore-centre field is 0.3–1.5 T, FEA-verified, with bore diameter 20–300 mm and active length 50–600 mm tuned to your throughput.