Since the tap of the hand used to tap stand to the thick iron material was damaged, the wall thickness was newly changed, and the processing was completed with the prepared hole 2.5φ (tip, middle, up). Although the tap diameter was small, the wall thickness of the iron material was disastrous and broken · Since the first one was processed without difficulty, it worked continuously, but failed.
On 2011-09-25 16:01:18
I made it again with a tap sprayer and a tap to avoid failing. Since the material thickness is the cause, we reduced the thickness of the processed part and reduced the burden on the tap.