DO NOW. 3/11/2014. LESSON #. What are the. Focus Point : What are the Types of Punches?. Instructional Objectives: 1. List the purpose of various punches. 2. Describe the different types. 3. Use a specified punch. LESSON #. March 11, 2014. I) Punches:.
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March 11, 2014
punch is a hard metal rod (carbon steel) with a shaped tip at one end and a blunt butt end at the other that is struck by a hammer.
May also be used to align holes in the skin for faster installation. (Aligning punch)
This differs from the pin punch in its length (6-8 inches) It tapers from 1/8” at the point to 3/8” at the shank.Pin Punch Cont’d.
Gasket: Stationary seal between two (2) flat surfaces.
Must be placed on a wood or lead plate to prevent damage of the cutting edge.
Now the punch is hit with a hammer, driving it through the gasket material where the holes are required.Gasket Punch
May be used to free pins or bolts that are “frozen” in their holes. After the pin or bolt has been loosened the drift pin may be to large to finish the removal, then use a pin punch.DRIFT PIN