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Figure 13-22.--Using a plug weld to remove a broken tap.
IN PLACE MACHINING

Machinery Repairman
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Figure 13-23.--Metal disintegrator removing a broken stud.
have it welded to the tap. Use a nut with a hole
immediate area around the hole with an oxya-
somewhat smaller than the tap diameter to avoid
cetylene torch. This quick heating expands the
welding the nut and the tap to the job itself. Allow
adjacent metal of the work and allows you to
the weld to cool before you try to remove the tap.
remove the tap more easily. If the heating is too
When the nut, tap, and job have come to room
slow, the tap will expand with the metal of the
temperature, it often is helpful to quickly heat the
work and there will be no loosening effect.
13-18






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