Crack Test Kit

This kit is very easy to use, spray on the white background which is dry in 60 seconds. Place a magnet behind where you are testing,

 then spray on the the magnetic die. As the dye runs away, if there is a crack it will show as a jagged black line.

Cracks as small as 1 to 2 mm in length can be detected.

 

Here is a picture of a 3 bearing crank I have checked and as you can see there is a good crack in it!