Damaged or not
1. Thickness
2. Cracking with DP test
Bimetallic Bearing - Bearing metal 0.4mm , rest other metal SS
1. Bearing metal
0.4mm thickness
While removing checking by lead wires
STG - 0.278mm
2.
DP Test
Die Penetrating Test
1. Cleaner
2. Penetrant 10min apply then clean with cloth
3. Developer - white flim with purple patches where damaged area
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