Engineering resources
Engineering guides for better magnet decisions.
Practical references for choosing materials, protecting surfaces, defining magnetic direction, and preparing a custom magnet project with fewer hidden assumptions.
MaterialOutput, temperature, stability, corrosion, and cost
DesignGeometry, tolerances, coating, assembly, and pole direction
SupplyPrototype learning, inspection, tooling, and annual demand
Overview
Make the hidden design choices visible.
A grade and a set of dimensions rarely tell the whole story. The product becomes easier to develop when temperature, exposure, air gap, assembly, pole direction, and the result to be measured are clear.
Material Selection
Compare rare-earth routes and understand what a grade name can—and cannot—decide.
Types of Permanent Magnets
Separate NdFeB, SmCo, ferrite, and Alnico material families from shape, route, magnetization, and assembly terminology.
Read guideWhat Is a Neodymium Magnet?
Define NdFeB, then connect the material label to grade, circuit, temperature, coating, magnetization, assembly, and measurement.
Read guideBonded vs Sintered NdFeB Magnets
Treat the choice as a finished-part route decision rather than a one-axis strength comparison.
Read guideInjection-Molded vs Compression-Bonded NdFeB
Compare two bonded-magnet DFM routes without assuming a universal geometry, strength, cost, or volume winner.
Read guideSmCo vs NdFeB Magnets
Choose by output, temperature, corrosion, geometry, assembly, and validation risk.
Read guideMagnet Coercivity Explained
Use Hcb and Hcj as different material inputs, then evaluate the actual working point, temperature, reverse field, and validation evidence.
Read guideRemanence in Permanent Magnets
Use Br as one controlled material input, then connect it to geometry, air gap, circuit, temperature, and measurement.
Read guideNeodymium Magnet Grades
Use grade names as a starting point, then evaluate the actual magnetic circuit and operating envelope.
Read guideNdFeB vs Ferrite Magnets
Compare finished systems across output, envelope, temperature, environment, manufacturing, integration, economics, and validation.
Read guideN35 vs N52 Magnets
Compare useful system output, circuit, coercivity, temperature margin, geometry, supply, cost, and validation instead of choosing by grade number alone.
Read guideN52 Magnets
Use the grade class as one input, then prove useful circuit output, adverse-condition margin, and a justified production change.
Read guideHow to Read a Demagnetization Curve
Connect the material curve to its load line, operating point, temperature, adverse fields, and representative validation.
Read guideHigh Temperature Magnets
Compare candidate material routes against the same thermal profile, working point, environment, assembly, and validation target.
Read guideCurie vs Operating Temperature
Keep the material transition, published guidance, actual heat exposure, and released project limit as separate records.
Read guideHigh Temperature Neodymium Magnets
Qualify the exact NdFeB grade and finished circuit under heat, reverse fields, geometry, coating, assembly, and acceptance evidence.
Read guideSystem Architecture & Assembly
Choose the field source and attachment route around the complete system, production interface, and release evidence.
Permanent Magnet vs Electromagnet
Compare retained field, electrical control, power, heat, package, duty, fault state, and system validation.
Read guideAdhesive Magnets
Treat the rigid magnet, coating, adhesive, substrate, load direction, process, environment, and retention test as one joint.
Read guideAdhesive Magnetic Sheets
Define flexible construction, mating target, pole behavior, converting, bond, finish, packaging, and final functional test together.
Read guideFailure Analysis
Separate measurement, assembly, environment, damage, heat, and adverse-field causes before assigning magnet loss.
Why Permanent Magnets Lose Strength
Use a diagnostic tree to distinguish apparent system change from reversible or irreversible magnetic loss.
Read guideMagnet Demagnetization by Heat
Use a controlled flow to separate hot-state change, measurement or assembly differences, damage, and irreversible loss.
Read guideHow to Read a Demagnetization Curve
Review the curve convention, knee, load line, operating point, and adverse-condition margin before assigning demagnetization risk.
Read guideMagnet Coercivity Explained
Review the material-level resistance to opposing fields without treating coercivity as a finished-system result.
Read guideNeodymium Magnet Coating Types
Review coating damage, corrosion exposure, edge protection, bonding, and validation evidence.
Read guideWhy Neodymium Magnets Rust
Use a controlled corrosion-path tree before choosing cleaning, reuse, coating, or material changes.
Read guideMagnet Coating Peeling
Preserve coating layers, substrate, location, mechanical, chemical, and assembly evidence before assigning a failure path.
Read guideMagnet Quality Control and Inspection
Connect the symptom to controlled dimensional, magnetic, coating, traceability, and release evidence.
Read guideSurface Protection
Select a coating route around exposure, assembly, dimensional build, and required evidence.
Neodymium Magnet Coating Types
Connect surface protection with corrosion risk, bonding, cleanliness, handling, and finished dimensions.
Read guideMagnetization
Make pole direction, pole count, physical references, delivery state, and verification unambiguous.
Magnetization Direction and Patterns
Specify axial, diametrical, radial, and multipole requirements in a drawing-ready way.
Read guideAxial vs Diametrical Magnetization
Compare pole location, field direction, angular reference, assembly, fixture, and inspection implications.
Read guideHow to Specify Magnetization on a Drawing
Define direction, polarity, pole count, physical reference, delivery state, and magnetic acceptance together.
Read guideDrawing & Tolerances
Build the drawing around functional interfaces and a realistic manufacturing and inspection route.
Permanent Magnet Dimensional Tolerances
Align datums, coating state, brittle features, process capability, and inspection method.
Read guideHow Permanent Magnet Dimensions Are Inspected
Match the measurement method, fixture, coated state, sampling, and acceptance rule to the functional requirement.
Read guideCustom Magnet Drawing Checklist
Control material intent, functional datums, coating, magnetization, inspection, quantity, and revision status before quotation.
Read guideInspection & Quality
Decide what must be measured, how it will be measured, and what evidence protects the product.
Magnet Quality Control and Inspection
Review dimensional, magnetic, coating, traceability, release, and change-control planning.
Read guideHow Permanent Magnet Dimensions Are Inspected
Connect datum strategy with the equipment, fixture, coated state, correlation, sampling, and evidence used for acceptance.
Read guideRFQ Preparation
Package the project context that lets engineering and purchasing receive a useful response sooner.
How to Choose a Neodymium Magnet Manufacturer
Evaluate drawing review, process fit, samples, inspection, traceability, change control, continuity, and comparable commercial terms.
Read guideCustom Magnet Price Factors
Align material, geometry, tolerances, tooling, inspection, quantity, packaging, logistics, and commercial assumptions before comparing quotes.
Read guideCustom Magnet Drawing Checklist
Review the controlled drawing package and identify open technical decisions before sending the RFQ.
Read guideCustom Magnet RFQ Checklist
Download the one-page worksheet for application, operating conditions, quantities, timing, and evidence requirements.
Open checklistCustom Magnetic Engineering
See how material, geometry, coating, magnetization, assembly, validation, and repeat production are reviewed as one route.
Read guide
Engineering input
A simple sketch can unlock a better design conversation.
Even a simplified CAD section, air-gap sketch, mating-part description, or field target can reveal whether the proposed grade and shape are sensible. Early context is especially important for thin walls, tight tolerances, multipole parts, high temperature, and coated assemblies.
- 2D drawing with tolerances and datums
- 3D model for geometry and assembly review
- Target force, torque, field, or sensing distance
- Operating temperature and environmental exposure
- Prototype quantity, annual volume, and timing
Technical reference
Quick material route comparison
Use this only as a first screen. Final grade and process selection should follow the application review.
| Material route | Often selected for | Review carefully |
|---|---|---|
| Sintered NdFeB | Highest compact magnetic output and broad grade availability | Temperature, corrosion protection, brittleness, coating, and demagnetization margin |
| Sintered SmCo | High temperature, stability, and demanding environments | Cost, brittleness, machining limits, magnetizing field, and assembly handling |
| Bonded NdFeB | Complex geometry, dimensional repeatability, inserts, and multipole patterns | Lower output, binder limits, tooling, process route, and magnetization fixture |
Start a project
Start with what you know.
A current drawing, a failed part, a product target, or a short list of constraints is enough to begin a useful conversation.
Latest engineering articles
Focused answers for the next design decision.
Short, practical references for questions that commonly appear during drawing review, material selection, inspection planning, and RFQ preparation.
High Temperature Neodymium Magnets: Specification and Sourcing Guide
Qualify high-temperature NdFeB by exact grade data, working point, thermal history, reverse fields, geometry, coating, assembly, and representative testing.
Read the articleCurie Temperature vs Maximum Operating Temperature in Magnets
Separate Curie temperature, supplier guidance, continuous and peak exposure, and the released project-specific magnet operating limit.
Read the articleAdhesive Magnetic Sheets: Specification, Selection and Sourcing Guide
Specify flexible adhesive magnetic sheet by construction, pole pattern, thickness, converting, substrate, mating target, environment, packaging, and validation.
Read the articleAdhesive Magnets: Specification, Selection and Sourcing Guide
Specify adhesive-backed rigid magnets by magnet surface, adhesive, substrate, load direction, environment, assembly process, and representative retention evidence.
Read the articleHigh Temperature Magnets: Specification, Selection and Sourcing Guide
Compare NdFeB, SmCo, ferrite, Alnico and bonded routes against one thermal envelope, magnetic circuit, environment, assembly, and validation target.
Read the articlePermanent Magnet vs Electromagnet: Engineering Differences and Selection
Compare permanent-magnet and electromagnet architectures by field state, control, duty, power, heat, magnetic circuit, packaging, fault behavior, and validation.
Read the articleN52 Magnets: Specification, Selection and Sourcing Guide
Select N52 for an OEM design by exact material data, useful target, circuit conversion, operating margin, production impact, and representative validation.
Read the articleHow to Read a Permanent-Magnet Demagnetization Curve
Read a permanent-magnet demagnetization curve by identifying the convention, intercepts, knee, load line, operating point, adverse conditions, and validation evidence.
Read the articleMagnet Coating Peeling or Blistering: Root Causes to Check
Diagnose peeling, blistering, chipping, corrosion, contamination, cleaning, assembly stress, and handling evidence before assigning a coating root cause.
Read the articleMaximum Energy Product (BHmax) Explained
Interpret BHmax as a controlled material energy-density indicator without confusing it with finished field, force, torque, temperature margin, or system performance.
Read the articleWhy Neodymium Magnets Rust: Causes, Diagnosis and Prevention
Diagnose NdFeB corrosion by tracing coating damage, exposed edges, moisture, chemicals, assembly interfaces, material loss, and controlled evidence.
Read the articleRemanence in Permanent Magnets: What Br Means
Understand remanence Br as a material property, then connect it to geometry, air gap, circuit, temperature, magnetization, measurement, and finished-system validation.
Read the article