There a variety of factors to consider when selecting the type of magnetic chuck for a machining application.
As an alternative to mechanical clamping of work-pieces, magnetic chucks are ideal for holding ferromagnetic work-pieces together. They are commonly used in grinding, milling, spark erosion and pallet-loading applications.
You can also buy strong magnetic strips that is being used in various kinds of products and applications
Magnetic chucks consist of an accurately centered permanent magnet face. Fixed pole pieces are brought into contact with electromagnets or permanent magnets. The work-piece to be held closes the magnetic loop or path, onto those fixed plates, providing a secure anchor for the work-piece.
To reap the advantages, a number of factors must be considered to properly marry the magnetic chuck to the application.
There a variety of factors that need to be considered, including:
Type of Material: Magnetic chucks only work with materials that have the ability to be magnetized. Paramagnetic or diamagnetic materials do not magnetize well if at all and are not good candidates for magnetic chuck work holding.
Material hardness, shape, and flatness of the work-piece material are also part of the material evaluation process.
Type of Machining: Machines and type of machining are important considerations for the selection of a magnetic chuck. Factors such as horsepower, spindle speed, and size of cutter or tool need to be considered.
Surface Area: Magnetic holding force is directly proportional to the surface area. Smaller parts that have less available contact area may require positive steps to overcome the forces of the machine. Irregularly shaped parts may require a magnetic fixture to securely hold the work-piece.