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2. Knockout punch - Wikipedia

   en.wikipedia.org/wiki/Knockout_punch

   A manual knockout punch can handle holes from 0.5 to 1.25 in (13 to 32 mm). The ratchet system has a custom ratcheting wrench that uses a ball screw to make the process faster and easier. This type of system has a mechanical advantage of approximately 220:1 and can punch holes up to 3 in (76 mm) in diameter in 10 gauge mild steel . [ 3 ]

3. Greenlee - Wikipedia

   en.wikipedia.org/wiki/Greenlee

   Greenlee is an American industrial and electrical tool company headquartered in Rockford, Illinois.It was founded in 1862 by twin brothers Robert L. and Ralph S. Greenlee to manufacture their invention called a hollow chisel mortiser, consisting of a drill surrounded by four chisel blades used in making mortises (the hole) for mortise and tenon joints, for the furniture industry in Rockford. [1]

4. Turret punch - Wikipedia

   en.wikipedia.org/wiki/Turret_punch

   A turret punch or turret press is a type of punch press used for metal forming by punching. Punching, and press work in general, is a process well suited to mass production. However the initial tooling costs, of both the machine and the job-specific press tool, are high. This limits punch work from being used for much small-volume and prototype ...

5. Automatic center punch - Wikipedia

   en.wikipedia.org/wiki/Automatic_center_punch

   The most common mechanism is based upon the Sweet patent. Within the body of the punch, there are three principal moving parts arranged in line: The punch; The intermediate rod (tumbler) The hammer (hammer mass) The hammer mass is spring-loaded from the back of the punch by a large spring. (The spring's preload compression can usually be ...

6. Punch down tool - Wikipedia

   en.wikipedia.org/wiki/Punch_down_tool

   A punch down tool, punchdown tool, IDC tool, or a Krone tool (named after the Krone LSA-PLUS connector), is a small hand tool used by telecommunication and network technicians. It is used for inserting wire into insulation-displacement connectors on punch down blocks , patch panels , keystone modules , and surface mount boxes (also known as ...

7. Punchcutting - Wikipedia

   en.wikipedia.org/wiki/Punchcutting

   A punch (left) and the respective matrix produced from it (right). The small letters at the base of the matrix are founders marks. Punchcutting is a craft used in traditional typography to cut letter punches in steel as the first stage of making metal type. [1]