24k Gold Finish, Low Contact Resistance, Bio-Compatible
We supply Custom Neodymium Rods finished with a premium Quad-Layer Gold Plating (Ni-Cu-Ni-Au).
Standard Nickel-plated rods are functional for holding.
But they oxidize over time.
This creates electrical resistance and potential skin irritation.
Our Gold Plated Rods are engineered for high-tech integration.
They combine the deep magnetic reach of the rod shape with the Noble Metal properties of Gold.
This makes them the industry standard for applications that require reliability and conductivity are non-negotiable.
For example, Magnetic Pogo-Pins, Battery Charging Connectors, and Medical Sensor Probes.
Why Gold Rods?
Gold is an investment.
Here is why engineers specify it for rod magnets:
1. Electrical Conductivity (The Charging Pin):
The Application:
Magnetic charging cables and dock connectors.
The Logic:
Standard Nickel oxides increase electrical resistance.
This leads to slow charging or signal loss.
Gold does not oxidize.
The Benefit:
A Gold Rod provides consistently Low Contact Resistance.
It ensures that when the magnet snaps into place, the electrical circuit flows immediately and efficiently.
2. Direct Solderability:
The Application:
PCB (Printed Circuit Board) mounting.
The Benefit:
Gold has excellent wettability with solder.
Nickel can be difficult to solder without harsh fluxes.
But Gold Plated rod magnets can be soldered directly onto a circuit board.
This simplifies your assembly process.
3. Biocompatibility (Wearables):
The Application:
Hearing aids, smartwatches, and medical eyewear.
The Logic:
Nickel is a common allergen (contact dermatitis).
The Benefit:
Our Gold plating encapsulates the nickel layers.
Provides a Hypoallergenic Shield.
This allows the magnet to sit against the user’s skin safely without causing irritation.
Manufacturing Specs: The “Quad-Layer” Stack
To ensure the gold doesn’t rub off immediately, we build it on a solid foundation.
The Plating Structure:
We do not simply flash-gold a raw magnet.
We use a 4-stage process:
1).Base Nickel: Adhesion to the Neodymium core.
2). Copper: Corrosion protection and surface leveling.
3). Second Nickel: Structural hardness.
4). Top Gold (24k): The functional conductive/cosmetic layer (0.05 – 0.1 microns).
5). Total Thickness: ~15-20 microns.
6). Tolerance:
– Rods are often press-fit.
– We can hold diameter tolerances to ±0.05mm (Standard).
– Or ±0.005mm (Precision) upon request.
Durability Advisory: Sliding vs. Contact
Gold is soft.
Design your mechanism accordingly.
The “Compression” Rule:
The Warning:
Gold has low hardness.
If you design a mechanism where the rod slides inside a steel tube or latch, the gold layer will wear away quickly.
The Advice:
Gold magnets should be used for Compression Contacts (Snap-On / Snap-Off) only.
If sliding is required, consider our Everlube coating instead.
Ideal Applications
Pogo-Pin Connectors: Spring-loaded magnetic connectors for data/power.
Reed Switch Activators: Corrosion-resistant rods for liquid level sensors.
Luxury Packaging: Invisible hinge pins for high-end jewelry boxes.
Medical Implants: External coupling magnets for cochlear implants.
Ordering Guide: Specifying the Rod
To manufacture these accurately, please specify:
1). Dimensions: Diameter x Length.
2). Magnetization:
– Axial: (Poles on the flat ends). Standard for connectors/sensors.
– Diametric: (Poles on the curved sides). Used for rotational sensors.
3). Function: “Is this for electrical conduction?”
– We prioritize plating thickness.
4). Cosmetic Requirement: “Is this a visible luxury part?”
– We perform extra visual sorting for dents/scratches.
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