An interfering residual magnetism can remain in steel and cast workpieces after machining. If these parts have to be demagnetised for other purposes, this can usually be easily achieved with the tunnel demagnetisers.
For automatic demagnetising on the production line with continuous plastic transport belt and drive motor. The workpieces are moved through the tunnel with a speed of approx. 0.2 m/s. A low-frequency generator can be used as a ballast unit for parts which are difficult to demagnetise.