Bonded Magnets

Bonded magnet materials can be either Injection Molded or Compression Bonded. Injection molded magnets can be molded into complex shapes and also molded directly onto components. Compression Bonded materials offer higher magnetic output but are limited to simpler geometries than Injection Molded materials. Injection molded magnets can be made from NdFeB, Strontium Ferrite or a combination of the two. Compression Bonded magnets can be made from either NdFeB or SmCo powders.

Injection Molded:

Binder Types / Nylon / PPS / Polyamide.
Temperature Range -40c - 180c
Very Tight tolerances off tool ( 0.002 -0.003 Typical )
Very good mechanical strength

Compression Bonded:

Higher Magnetic Strength due to higher magnetic particle density.
Epoxy Binder / Resistant to normal industrial solvents and automotive fluids
Epoxy Coat after manufacturing to prevent oxidation
Temperature Range -40c - 165c
"Tight" tolerances off tool
Good mechanical strength

Typical Applications:

Sensors
Brushless DC Motors

General Applications:

Materials are isotropic and can be magnetized in any direction
Wide range of existing tool sizes are available in rings, discs and rectangles
Exsisting Multipole magnetizing fixtures for quick prototyping
Easily machined
Multipole rings simplify assembly verse arc sepments