15mm Neodymium Magnets are sintered NdFeB disc magnets with a fixed 15 mm outside diameter and configurable thickness, grade, magnetization, coating, and machining features.

Standard configurations include N35, N42, N45, and N52 grades with standard thickness options from 2 mm to 10 mm. H and SH grades are available for applications requiring higher resistance to thermal demagnetization.

OEM and replacement production can be specified by magnetic performance, dimensional tolerance, magnetization, coating, machining, packaging, and documentation requirements.

Technical Specifications

15mm Neodymium Magnet Specifications

Item	Specification
Material	Sintered NdFeB
Shape	Disc
Diameter	Ø15.0 mm
Standard Thickness	2–10 mm
Standard Grades	N35, N42, N45, N52
Temperature Grades	H, SH and other temperature grades by requirement
Maximum Energy Product	Up to approximately 52 MGOe, depending on material grade
Standard Magnetization	Axial
Standard Coating	Ni-Cu-Ni
Other Coatings	Zinc, epoxy, gold and other specified finishes
Diameter Tolerance	±0.1 mm unless otherwise specified

Thickness & Grade
For the fixed Ø15.0 mm diameter, buyers can specify thickness and NdFeB grade according to the required magnetic output, installation depth, and available space.
Common Thickness Configurations
• 15.0 mm OD x 2.0 mm THK: Low-profile configuration for assemblies with limited installation depth.
• 15.0 mm OD x 3.0 mm THK: General compact configuration for applications requiring a moderate magnet thickness.
• 15.0 mm OD x 5.0 mm THK: Increased magnet volume for applications requiring higher magnetic output or pull force.
• 15.0 mm OD x 10.0 mm THK: Deeper magnetic configuration for applications requiring higher magnetic output within the fixed 15 mm diameter.

Material Grade Selection
• N35–N42: Moderate magnetic performance for general applications within standard temperature conditions.
• N45–N50: Higher magnetic energy density within the fixed 15 mm diameter.
• N52: Higher energy density for space-limited configurations operating below 80°C.
• H / SH Grades: Higher coercivity for applications exposed to elevated temperatures or increased demagnetizing fields.

Magnetization Configurations
The standard 15 mm disc configuration is axially magnetized, with opposite poles on the two flat faces. Custom magnetization can be specified according to the magnetic circuit.
• Axial Magnetization: Poles oriented on the two flat parallel surfaces.
• Diametrical Magnetization: Poles positioned across the diameter perpendicular to the central cylinder axis.
• bRadial Magnetization: Magnetic orientation directed radially through the cylindrical geometry according to the specified pole configuration.
• Multi-Pole Magnetization: Multiple poles arranged on the flat face or circumference according to the required magnetic circuit.

Protective Surface Coatings

Coating System	Environmental & Operational Suitability
Ni-Cu-Ni	Standard triple-layer plating for general industrial assemblies and dry internal housings.
Zinc (Zn)	Metallic coating for dry environments or secondary encapsulated assemblies.
Epoxy (Black/Clear)	Organic barrier layer providing enhanced resistance to high humidity and chemical exposure.
Gold (Ni-Cu-Au)	Available for specified electronic, appearance, or corrosion-resistance requirements.
Other Finishes	Parylene and other coatings available according to environmental requirements.

Machining Features & Tolerances

The standard component uses a plain Ø15 mm disc profile. Custom machining can be produced according to engineering drawings, including:
Specified custom thickness and outer diameter tolerances
Edge chamfering (anti-chipping protection for automated assembly)
Countersunk holes (90° or 82° flat-head screw fitment)
Counterbored holes (socket-head cap screw mounting)
Straight axial through-holes
D-flats and anti-rotation locating profiles
Axial or radial retention grooves and stepped profiles

OEM / Custom Configurations

15mm neodymium magnets can be customized for OEM and replacement requirements. The following ranges cover the main configurable dimensions and specifications for the 15 mm disc format.

Custom Item	Available Range / Options
Thickness	1–20 mm available for custom configurations.
NdFeB Grade	N35–N52, plus H, SH and other temperature grades
Magnetization	Axial, diametrical, radial, or multi-pole
Coating	Ni-Cu-Ni, zinc, epoxy, gold (Ni-Cu-Au), Parylene and other specified coatings
Machining	Through-holes, countersinks, counterbores, chamfers, D-flats, grooves, and stepped profiles.
Surface Field	3,000–6,000 Gauss, depending on magnet thickness, NdFeB grade, and measurement position.
Packaging	Individual separation, trays, poly bags, labels, export cartons, and magnetic shielding for air freight

For replacement projects, buyers can provide a sample, 2D drawing, 3D CAD file, part number, or existing supplier specification for technical review before quotation and sample approval.

Quality Inspection Scope & Documentation

Production lots are inspected against approved drawing specifications and quality control plans before dispatch:
Standard Quality Control Items
Dimensional Verification: Diameter, thickness, concentricity, hole profiles, chamfers, and geometric tolerances.

Surface & Coating Integrity: Visual surface auditing, plating adhesion, and coating thickness verification.

Magnetic Property Testing: Surface magnetic field, total flux, pole orientation, or breakaway pull force.

Compliance Documentation: Material Certificate of Analysis (CoA for Br, Hcb, Hcj, BHmax), dimensional inspection records, and applicable RoHS 3 / REACH statements.

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RoHS REACH

Packaging & Logistics Controls

Packaging configurations are selected based on magnet dimensions, quantity, handling requirements, and shipment mode:
Inner packaging cartons with protective foam padding
Export-grade outer cartons and palletized shipment
Customer-specified part labelling and barcode compliance
Magnetic shielding packaging: Available for air-freight shipments according to applicable carrier and transport requirements.

FAQ

Q: Can you provide a specific pull force for a 15mm magnet?

A: Yes. Pull force can be specified for the required Ø15 mm configuration. The quotation or test specification should define the magnet thickness and grade, mating steel, steel thickness, air gap, contact surface, test temperature, and measurement method so that the result can be evaluated consistently.

Q: Can 15mm neodymium magnets be diametrically magnetized?

A: Yes. Axial magnetization is the standard configuration, while diametrical, radial, and multi-pole magnetization can be produced according to the required magnetic circuit. Pole orientation and pole count should be specified on the drawing or technical specification.

Q: Can 15mm magnets be supplied with countersunk holes or other machined features?

A: Yes. OEM machining can include through-holes, countersinks, counterbores, chamfers, D-flats, grooves, and stepped profiles. The drawing should specify the feature dimensions, tolerances, reference face, and required magnetization direction.

Q: Which coating should be specified for 15mm neodymium magnets?

A: Ni-Cu-Ni is a common coating for general industrial use. Zinc, epoxy, gold, and other coatings can be specified according to humidity, chemical exposure, abrasion, adhesive compatibility, and assembly requirements. For elevated-temperature applications, the NdFeB temperature grade should be considered separately from the coating.

Q: Can you reproduce an existing 15mm neodymium magnet?

A: Yes. A sample, 2D drawing, 3D CAD file, part number, or existing supplier specification can be submitted for replacement evaluation. The grade, dimensions, magnetization, coating, tolerance, and magnetic performance can then be confirmed before production.

Q: What information is required for a 15mm magnet quotation?

A: For a formal quotation, provide the diameter × thickness, NdFeB grade, magnetization, coating, dimensional tolerance, magnetic performance requirement, machining features, quantity, and packaging requirements. For engineered or replacement parts, a drawing, CAD file, sample, or existing specification is recommended.

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