Clear communication and defining your magnet requirements is key to a smooth project. A partnership approach to business with your magnet suppliers ensures better collaboration and understanding. This guide will help you communicate with magnet suppliers so you get accurate quotes and delivery times. Additionally, understanding the importance of contracts in vendor partnerships can further solidify these relationships.
Magnet Procurement Requirements
When defining your magnet requirements, we should focus on:
performance,
shape and size,
magnetization direction,
surface treatment
Providing drawings of the magnets is highly recommended.
Let’s go into each of these in more detail using NdFeB (Neodymium Iron Boron) and injection-molded NdFeB magnets as examples.
1. Performance
The performance of a magnet is determined by the grade. Different suppliers may have different definitions and performance ranges for the same grade. To avoid confusion both parties should clarify the remanence (Br) and intrinsic coercivity (Hcj) of the specified grade. If the buyer is unsure of the specific grade they should provide auxiliary indicators such as surface magnetic field, pull force, magnetic flux or magnetic moment.
Also depending on the operating environment of the magnet, the temperature coefficients of remanence and coercivity may need to be specified. If there are specific requirements for magnetic flux the testing equipment and methods should be agreed upon as the standard for testing.
2. Shape, Size, Magnetisation Direction
The shape and size of the magnet is key information that must be clearly stated in the procurement requirements. For simple products providing basic length, width, height and tolerances (e.g. 6.0mm [+0.03/-0.03]) is sufficient. For complex shapes detailed contours and angle specifications are required and providing drawings is highly recommended.
Also the magnet’s orientation direction and magnetisation method (e.g. single pole or multi pole magnetisation) and magnetisation angle must be specified.
3. Surface Treatment
Specify the surface treatment process for the magnet, including the coating method (e.g. electroplating, chemical plating, electrophoresis, vapor deposition), coating material (e.g. zinc, nickel, copper, aluminum, epoxy resin) and coating thickness. If there are requirements for salt spray or other tests agree on the testing conditions, duration of testing and post test evaluation criteria.
4. Additional Magnetic Assemblies
Other: appearance standards, additional testing (e.g. aging tests), packaging, transportation requirements.
Delivery Times for Vendors
Besides the basic requirements of the magnet, defining the project delivery times is key. In most cases, having a clear delivery schedule helps in reducing uncertainty and ensuring timely completion. Both parties must have a common understanding and agreement on the delivery schedule to avoid delays in the project.
Thank you for reading our article! We hope it aids in your search for the procurement of NdFeB Magnets. For more information, visit Mainrich Magnets. With over 30 years of expertise and a 98+% quality consistency rate, we offer high-quality rare earth magnets at fair prices. Our customer-centric service and adherence to ISO 9001:2015, RoHS, and REACH standards ensure you get the best. Reach out to discover more.
