Ndfeb n42 ring neodymium magnet 20mm x 6mm x 2mm magnet

How to choose the suitable NdFeB magnet?

Neodymium magnets are relatively new, they were developed in the mid 1980s and can now be found extensively in countless modern applications from fridge magnets to wind turbines!Since the introduction of neodymium magnets, the manufacturing cost of neodymium magnets has fallen in line with a massive increase in production capability and now small neodymium magnets are cheap enough to be used in low cost promotional giveaway items.

If this is not your first time purchasing for magnets,then you know exactly what size,grade,coating and magnetization direction you needs.You can send us a RFQ directly by email or "leave us message",and we will respond to you within 24 hours.

If you're purchasing magnets for the first time,let's share the following information：

1.Dimensions: 

The size can be customized,according to your requirement.

As a manufacturer,we produce magnets for each order according to customers' requirements.If you can provide accurate measurements and tolerances of magnet,it is very helpful for quotation and production. 

If you are not sure what dimension you need, we also accept trial orders for samples of different sizes and different grades.

In this way, you can test them and ultimately help you successfully develop new products / projects.

2.Grade of NdfeB Magnet: 

If your application is at room temperature only,the N series is the best choice,with a max operating temperature 80 degrees Celsius. Generally speaking,the N35 grade is relatively cost-effective and also have strong magnetic force.
But which grade to choose depends on your pursuit of magnetic force or say application.
The higher the temperature of resistance of the magnet,the more expensive it is.For example,N35 grade and N35M grade have the same magnetic force,but the max operating temp. of N35M is 100 degrees Celsuis，N35 is only degrees Celsuis.

Please click here to check the grade of Sintered Neodymium Magnet.

3.Magnetization direction:

Ring NdFeB magnet can be magnetized in four main ways, it depends on your application requirements.

4.Plating/Coating:

Nickel and Zinc coating are the most common,the salt spray test can meet the requirement of 24-48 hours.

Epoxy coating have excellent against humidity and salt spray environments,the salt spray test can reach 48-72 hours.

There are other types of coatings, such as chromium (nickel chromium alloy), gold (nickel chromium alloy + gold alloy), phosphating and passivation.

How to get a best quote?

After confirming the above four details,or if you have any further questions,we would love to receive your email or messages.We will calcualte the price asap according to your order/sample quantity,and respond to your concerns.