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Chassis punches: assorted sizes round and square Chassis punches: assorted sizes round and square disassembled. In metalworking, a knockout punch, also known as a chassis punch, panel punch, Greenlee punch, or a Q-max, [1] is a hand tool used to punch a hole through sheet metal. It is a very simple tool that consists of a punch, die, and screw.
(The spring's preload compression can usually be adjusted by loosening or tightening the end cap at the back-most portion of the punch, to decrease or increase the force of the punch.) A stopped hole drilled in the front center portion of the hammer mass facing the tumbler acts as a receiver for the rod, and as an anvil for the punch action.
The width of devices that are mounted on a 35 mm "top hat" DIN rail generally use "modules" as a width unit, one module being 18 mm wide. For example, a small device (e.g. a circuit breaker) may have a width of 1 module (18 mm wide), while a larger device may have a width of 4 modules (4 × 18 mm = 72 mm).
DIN 332-1: 60° centre holes; types R, A, B, and C: Active: DIN 332-2: Center holes 60° with thread for shaft ends for rotating electrical machines: Active: DIN 332-4: Centre holes for rail vehicles axles: Active: DIN 332-7: Machine tools; 60° centre holes; dimensioning: Active: DIN 332-8: Centre holes 90°, form S; dimensions, determination ...
A HACO CNC punching machine Punched hole: best results for cutting surface with above 70% cutting, low clearance necessary (8% material thickness) Punch presses are developed for high flexibility and efficient processing of metal stampings. The main areas of application are for small and medium runs.
The punch also needs to be high enough to accommodate the height of the resulting box's sides. Corrugating dies—Such dies have a wavy surface and may involve spring-loaded punch elements. Multiple-bend dies—A die set may be built in the shape of the desired profile and form several bends on a single stroke of the press.