FREE SHIPPING U.S. >= $10 FREE SHIPPING ON ALL U.S. ORDERS OF $10 OR MORE
EASY RETURNS
SAME DAY SHIPPING
FREE SHIPPING ON ALL U.S. ORDERS OF $10 OR MORE
  • EASY RETURNS
  • SAME DAY SHIPPING
  • FREE U.S. SHIPPING $10+ FREE SHIPPING ON ALL U.S. ORDERS OF $10 OR MORE
  • EASY RETURNS
  • SAME DAY SHIPPING
* Customers must select the Standard Shipping option during checkout in order to receive Free Shipping. If you select Priority or Overnight Shipping additional charges will apply. Not valid on international shipments.

What does pull force mean?

Pull force, also known as magnetic pull, is a measure of the strength of a magnet's magnetic field. It is the force that a magnet can exert on an object made of ferromagnetic material, such as iron, nickel, or cobalt. The pull force of a magnet is determined by the strength of its magnetic field and the size and shape of the magnet.

Often measured in pounds or kilograms, the pull force is the force required to pull that magnet straight free from a thick steel plate. The pull force also tells you the limit of that magnet's holding power.

Generally, any magnet with a pull force above seven pounds (3 kg) can pinch your fingers. Stronger magnets can be even more dangerous and should only be handled by experienced individuals. We always recommend hand and eye protection for large magnets. 

Magnets stick best to ferromagnetic surfaces and do not stick to chrome, brass, aluminum, silver, gold, wood, plastic or tile. Attaching magnets to these surfaces is best accomplished with countersunk or self-adhesive magnets.

 

What Effects Pull Force?

While the pull force rating enables you to determine how much weight or tension a magnet will hold, there are several other factors to consider which can affect a magnet’s pull force.


Vertical vs Horizontal Placement

The placement of the magnet is an important part of the equation.
A magnet placed vertically, such as on the underside of a steel beam or table, will hold its listed pull force weight.
A magnet mounted laterally/horizontally, such as on the side of a refrigerator or file cabinet, will only hold 30 percent or less of its listed pull force due to gravity and the potential for the magnet to slide down the attachment surface.


Air Gap

The magnet air gap is the distance between a magnet and the ferromagnetic material that it is attracting or repelling. The air gap is an important factor to consider because it can dramatically affect the strength of the magnetic field and the performance of the magnet.

Magnets lose holding power exponentially as you add distance between them and the other magnet or ferromagnetic material. Even seemingly small air gaps caused by debris or paint will impact the performance of the magnet. This is because the magnetic field lines become more spread out over a larger distance, resulting in a weaker overall field. This is a factor to consider if you are encasing the magnet in fabric or behind a piece of wood. 

 

Attachment Surface/Composition

The composition, size and thickness of the steel can also affect the performance of a magnet. Different types of steel have different magnetic properties, and some types of steel are more magnetic than others. For example, low-carbon steel is generally more magnetic than high-carbon steel, and stainless steel is generally less magnetic than other types of steel.

 

Choosing the Right Magnet

It can be challenging to select the best magnet for your specific application due to the numerous factors that can impact a magnet's pull strength. Testing the magnet in your application is the best approach to learn whether it will perform as needed. You may always get in touch with our magnet experts if you have any questions or want assistance selecting the right magnet. We will be delighted to assist you in making the best magnet choice for your needs.


Related Articles

Nickel vs Electroless Nickel Coating
Nickel is the most common coating for neodymium magnets, usually applied to the surface of the magnet by electroplati...
Read More
What is the difference between the south pole and the north pole of a magnet?
The south pole and north pole of a magnet are the two ends of a magnet that have opposite magnetic fields. The north ...
Read More
Will neodymium magnets rust?
Neodymium magnets are prone to rusting if they are exposed to moisture or high humidity environments. The rate at whi...
Read More
What are the differences between neodymium magnets and ceramic magnets?
Neodymium magnets and ceramic magnets are both useful materials with strong magnetic properties, but they have some i...
Read More
What are the benefits of a magnetic badge holder?
Magnetic badge holders offer a convenient and secure way to wear your identification badge, and they are a popular ch...
Read More
Neodymium Magnetization Directions
Neodymium rare earth magnets (NdFeb) vary in shape and size, and the different shapes each have their own correspondi...
Read More