Magnet Buying Guides – How to Choose the Right Magnet

Welcome to the Aussie Magnets Magnet Buying Guides page.

Choosing the right magnet depends on more than just size. Magnetic strength, temperature limits, mounting method, coating, and the type of surface the magnet will attach to all play an important role in selecting the best option.

Whether you are choosing a magnet for holding, mounting, separation, signage, outdoor use, or a custom application, understanding the key selection factors will help you achieve better performance and avoid costly mistakes.

These buying guides are designed to help you compare options and choose the right magnet for your application.

How to Choose the Right Magnet

Choosing the right magnet starts with understanding the application. Important factors include the required holding force, available space, operating temperature, environment, and whether the magnet needs to be removable or permanently fixed.

In many cases, the best magnet is not simply the strongest one — it is the magnet that best suits the surface, mounting method, and job requirements.

This guide helps you compare magnet types, shapes, coatings, and common application considerations.

→ View How to Choose the Right Magnet Guide

Magnet Strength Guide

Magnet strength is one of the most common points of confusion when selecting a magnet. Pull force figures can vary depending on the thickness of the steel, the contact area, and the presence of any air gap.

A magnet may appear strong in a test environment but perform very differently in a real-world application if the surface is thin, painted, uneven, or spaced away.

This guide explains how magnet strength works and how to choose a magnet with an appropriate safety margin.

→ View Magnet Strength Guide

Mounting & Fixing Guide

Some applications require a magnet to simply hold to steel, while others need the magnet itself to be mechanically fixed into place. This can affect whether you need a plain magnet, a countersunk magnet, a threaded pot magnet, or a rubber coated mounting magnet.

Choosing the correct fixing style can improve reliability, reduce damage, and make installation much easier.

This guide helps explain common mounting options and when to use each type.

→ View Mounting & Fixing Guide

Outdoor & Corrosion Guide

Not all magnets are suitable for outdoor or wet environments. Moisture, salt air, and damaged coatings can lead to corrosion, especially with standard neodymium magnets.

In some cases, painted, rubber coated, plastic coated, ferrite, or stainless steel assembly options may be more suitable depending on the application.

This guide explains what to consider when choosing a magnet for outdoor, marine, or high-moisture use.

→ View Outdoor & Corrosion Guide

Temperature Guide

Temperature can have a major effect on magnet performance. Some magnet materials lose strength or become permanently damaged if exposed to excessive heat, while others are designed to operate in high-temperature environments.

Understanding temperature limits is essential when selecting magnets for motors, machinery, industrial equipment, or outdoor use in harsh conditions.

This guide explains how temperature affects different magnet types and when high-temperature materials may be required.

→ View Magnet Temperature Guide

Surface & Contact Guide

The surface a magnet attaches to has a huge impact on real-world performance. Thick clean steel gives the best result, while painted surfaces, curved surfaces, stainless steel, thin sheet, and air gaps can reduce holding force significantly.

Many magnet problems are caused not by the magnet itself, but by poor contact conditions.

This guide explains how surface type, contact area, and air gap affect magnet performance.

→ View Surface & Contact Guide

Custom Magnet Guide

Some applications require a custom magnet rather than an off-the-shelf product. This may include special sizes, unusual shapes, adhesive backing, coatings, magnetisation patterns, or complete magnetic assemblies.

Understanding what can be customised helps speed up product selection and ensures the magnet is matched correctly to the application.

This guide explains the key things to consider when specifying a custom magnet solution.

→ View Custom Magnet Guide

Choosing the Right Buying Guide

The best starting point depends on the type of problem you are trying to solve. If you are unsure which magnet material to use, start with the general selection guide. If you already know the application, it can be more useful to focus on mounting method, environment, temperature, or strength.

By working through the right guide first, you can narrow down your options faster and make a more informed choice.

These buying guides are written by the technical team at Aussie Magnets, an Australian supplier of industrial, commercial and specialist magnets since 1989.