We supply custom Neodymium magnets with a flat trapezoidal profile. With a wide base tapering to a narrower top face, with a low-profile (thin) cross-section. This geometry is designed for surface-mounted applications. The wide base provides greater bonding area when glued to a backplate or track. The tapered sides enable tight side-by-side packing in circular arrays (such as motor stators). Or, linear assemblies, minimizing gaps between adjacent magnets. Common in halbach arrays, sensor arrays. And applications where surface-mounted magnets need to tessellate efficiently. Specify your base width, top width, thickness, length, and taper angle. The Engineering Logic: Why the “Wide Base”? 1. Maximum Glue Surface (Shear Resistance): In high-acceleration linear motors, shear force can rip a magnet off its track. The Advantage: – By maximizing the width of the bottom face (Wmajor), we lower the center of gravity. – And drastically increase the surface area available for epoxy bonding. – This makes the magnet exceptionally stable and resistant to detaching. 2. Flux Focusing (Halbach Arrays): This shape is the classic “Side Magnet” in a Halbach Array. The Function: – The wedge shape allows the magnetic field to be “steered”. – Or, compressed between two rectangular magnets. – It boosts the holding force on one side while cancelling it on the other. The Fit: The angled sides ensure minimal air gaps between the wedge and its neighboring magnets. Technical Geometry: Defining the “Plate” Trapezoids are notoriously difficult to quote without a drawing. You must define the parameters. To manufacture this part, we control the following dimensions via profile grinding: – Bottom Width (Wmajor): The widest dimension (the base). – Top Width (Wminor): The top flat face. – Thickness (T): The height (usually thin/low profile). – Taper Angle: The angle of the slope. Edge Condition: – Standard chamfer or light radius (as shown in the photo)? – The purpose is to prevent chipping during assembly. Magnetization Orientation (Critical!) For this shape, the direction is almost never “up and down.” Transverse (Parallel to Face): – The magnetic field runs from the left slope to the right slope. – This is essential for Halbach Arrays. Through Thickness: – The poles are on the Top and Bottom faces. – Used for clamping/holding. Angled (Vector): – We can produce custom magnetization angles (M) relative to the geometry for specialized flux focusing. Surface Coatings Ni-Cu-Ni (Nickel): – As shown. – A durable, smooth finish. Phosphated / Passivated: – Highly Recommended. – If you will glue this “Wide Base” shape, a phosphated surface provides higher shear strength with structural epoxies. – So, we can say it’s more suitable than Nickel plating. Zinc (Zn): – Cost-effective for less critical applications. Applications Linear Motors: The “track” magnets used in pick-and-place machines and maglev systems. Halbach Arrays: Used in particle accelerators, free-electron lasers, and high-end loudspeaker assemblies. Sensor Targets: The dovetail shape acts as a key to ensure the sensor magnet is installed in the correct orientation. Clamping Wedges: Mechanical hold-downs. Ordering Guide: What We Need To quote this item, please provide a drawing or specify: 1). Dimensions: Bottom Width, Top Width, Thickness, Length. 2). Magnetization: This is the most common error. Please specify if the field flows through the Thickness (Up/Down) or the Width (Side-to-Side). 3). Quantity: (Trapezoids are batch-produced). 4). Coating: Nickel (Shiny) or Phosphated (Dark Grey for gluing)?