We supply custom Neodymium block magnets with beveled edges.
A flat base that tapers via sloped edges to a smaller flat top surface.
And combined with radiused (rounded) corners.
This profile eliminates sharp edges.
This makes the magnet safer to handle.
And they are suitable for applications where the magnet fits into a tapered recess or contacts skin or fabric.
The beveled geometry allows the magnet to self-center in tapered housings.
Common in magnetic latches for:
Consumer electronics (tablets, laptop closures), wearable devices, and packaging closures.
The Engineering Logic: Why the “Bevel”?
1. Housing Clearance (The “Draft Angle” Fit):
Plastic injection molded housings often have “draft angles” (sloped walls).
They help release the part from the mold.
The Fit:
A standard square magnet won’t fit all the way into a tapered plastic pocket.
Our Solution:
By beveling the top edges of the magnet, we match the draft angle of your housing.
This allows the magnet to sit flush at the bottom of the pocket without hitting the side walls.
2. Tactile Safety & Aesthetics:
If the magnet is exposed (e.g., a charging connector or a case latch):
The Feel:
Sharp corners feel “cheap” and can scratch skin or devices.
The Look:
The faceted, beveled edge catches the light and looks distinctively premium (high-tech aesthetic).
And the rounded corners prevent snagging on fabric or pockets.
Geometric Definitions: Defining the Taper
Since it’s a “truncated pyramid,” you need 4 dimensions to define the slope.
To manufacture this part, we control the geometry via CNC Profile Grinding:
– Base Dimensions: Length (L1) x Width (W1).
– Top Dimensions: Length (L2) x Width (W2). The top is smaller than the base.
– Total Thickness (T): The overall height.
– Edge Condition: Radiused vertical corners to prevent chipping.
Magnetization Orientation
Axial (Through Thickness):
– The standard.
– The top flat face is North (or South).
– And the bottom base is the opposite pole.
Note:
The magnetic pull force is concentrated on the flat faces.
The beveled sides have slightly less flux leakage.
Surface Coatings
Since this shape is often used in “Visible” applications, the plating quality is paramount.
Nickel (Ni-Cu-Ni):
– As shown in photo.
– Our process ensures the plating does not build up on the bevel edges.
– Maintaine the crisp geometric look.
Gold (Au):
– Popular for charging contacts on wearables.
Black Epoxy / Black Nickel:
– For “stealth” integration into black plastic cases.
Applications
TWS Earbud Cases: The magnets that snap the lid shut (often beveled to fit the curved case).
Smartwatch Chargers: Magnetic docking points.
Luxury Box Latches: The hidden magnet inside the flap (beveled edges prevent the paper/fabric overlay from tearing).
Bag Clasps: Smooth edges prevent wear on leather/fabric.
Ordering Guide: What We Need
To quote this complex shape, please provide a drawing or:
1). Base Size: Length x Width.
2). Top Size: Length x Width (or the “Bevel Size”).
3). Thickness: Height.
4). Corner Radius: (e.g., R0.5mm or R1.0mm).
5). Coating: “Is this a visible part?” (If yes, we will prioritize cosmetic plating quality).
