Crack Detection/Magnaflux

Due to the age and stress of most engines we work on this method is needed to identify cracks in the cylinder heads, engine blocks, connecting rods and crankshafts as well as other pieces of the engine that need to be checked.

The process uses an electrical current to produce magnetism in the part being checked, then a solution containing iron powder is sprayed over the part. Since the part is now magnetized the iron powder will get drawn onto the crack where using a black light the crack is plainly shown.

Otherwise, without this important step many cracks would go unnoticed, particularly cracks in most parts such as crankshafts, which aren't visible to the naked eye.

We use the Magnaflux DTC723 machine and have a capability to crack check parts up to 73 inches.

Mercedes 540k crankshaft being checked in the machine
for cracks.

Shows a crack highlighted using the magnaflux
machine, otherwise unnoticeable to the naked eye.
J& M Machine Company
40 Mt. Vickery Road,
Southborough, MA 01772
Phone: (508) 460 0733
Fax: (508) 460 6541