Tool Inspection - NPK PH1 Operator's Manual

TOOLS

TOOL INSPECTION

1. Deformation may occur on the tool in the retaining pin contact area (15) or thrust
surface (31). If these areas are mushroomed, the tool may become difficult to
remove from the tool holder. Dress with a grinder.
2. Excessive blank hammering will cause chipping (16) in the retaining pin contact area
(15). If neglected, the chipping may reduce the life or cause failure of the tool
retaining pin. Dress with a grinder.
3. Excessive blank hammering can cause retaining pin breakage/failure.
retaining pin.
4. If chipping (16) is found at the top of the tool, replace the tool. If neglected, the
piston impact surface will be damaged (13 is normal, 14 needs to be replaced).
- 54 -
Replace