Page 10 - S&M | Sandhack

Irontite Products Inc. Crack Detection & Repair Manual

INSTRUCTIONS
1. Clean the surface of the casting to be checked. Remove all oil, grease or other dirt from the surface of the
casting. Leave it dry.
2. Plug the magnet input cord into a nearby convenient electric outlet. Make certain that the magnet cord is
properly grounded and keep the unit away from water or other liquids when in use.
3. Position the magnet on the surface of the casting and activate the magnet with the push-button switch.
4. Using the powder spray bulb filled with magnetic powder, dust or “drift” the magnetic powder onto the
surface of the casting between the two poles or “legs” of the magnet.
The magnet creates a magnetic field in the casting, running from one pole to the other. If there is a crack in
the casting between the two poles, it breaks the field and draws an accumulation of magnetic powder, sharply
outlining the crack.
Since the magnetic powder reacts this way only between the poles of the magnet, it is necessary to move the
magnet around on the surface of the casting to check the area for other cracks and to show the full extent of
any crack.
5. When the magnetic powder shows the existence and location of a crack, the crack should be completely
marked so it can be easily identified later for the repair.

NOTE: This magnetic crack detection process can be used only on the types of castings subject to magnetic
charges. It cannot be used on aluminum castings.

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