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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 ]
The New Addams Family electric shock machine by Eurocom and Nova Productions at Musée Mécanique that actually works with vibration [3]. American Restoration features a restoration of a Punch-A-Bag strength tester machine from 1910 in the 6th episode "Knockout" and of a strength tester that had stood on the Santa Monica Pier in the 17th episode "Grippin' Mad".
The punch force required to punch a piece of sheet metal can be estimated from the following equation: [4] F = 0.7 t L ( U T S ) {\displaystyle F=0.7tL(UTS)} Where t is the sheet metal thickness, L is the total length sheared (perimeter of the shape), and UTS is the ultimate tensile strength of the material.
The 30.5 cm SK L/50 gun [A 1] was a heavy German gun mounted on 16 of the 26 German capital ships built shortly before World War I. [ 1 ] [ 2 ] Designed in 1908, it fired a shell 30.5 cm (12 in) in diameter and entered service in 1911 when the four Helgoland -class battleships carrying it were commissioned into the High Seas Fleet .
For all notch types, a key parameter in governing stress concentration and failure in notched materials is the notch tip curvature or radius. [ 1 ] Sharp tipped V-shaped notches are often used in standard fracture toughness testing for ductile materials, polymers and for the characterization of weld strength.
In boxing, a straight or cross (also commonly called a rear hand punch) [1] are punches usually thrown with the dominant hand and are power punches like the uppercut and hook. Compubox , a computerized punch scoring system, counts the straight and cross as power punches.