CNC Shearing

A programmable stop system on the shear that positions the sheet for precise, repeatable cuts.

The gap between the upper and lower shear blades, set as a percentage of material thickness (typically 5 to 10 percent).

The angular tilt of the upper shear blade relative to the lower blade across the cut length.

A flat metal piece cut to a specific flat pattern size for use in subsequent operations such as press braking, stamping, roll forming, or welding.

A raised, sharp metal edge left on the underside of a sheared part along the cut line.

A computer numerically controlled straight-blade cutting machine that automatically positions the back gauge for accurate, repeatable sheet metal cuts.

The dimension of a shear cut measured parallel to the blade, limited by the maximum bed length of the machine.

The maximum material thickness and sheet width that a given shearing machine can cut, rated by the machine's cutting force and blade length.

The degree to which a sheared blank lies in a single plane without warping or curvature.

Pneumatic or hydraulic clamping bars that press the sheet flat against the machine table during shearing.

The alloy and temper designation of the metal being sheared, such as A36 mild steel, 304 stainless, or 5052-H32 aluminum.

A sheared blank cut to a size close to the final part dimensions, minimizing material waste and reducing the amount of secondary machining, trimming, or forming required to produce the finished part.

The practice of optimizing sheet layout and programming cut sequences to minimize the amount of unusable material left after shearing.

The hardened steel cutting tool on a shear machine.

The internal stress within a material that causes it to fail along a plane parallel to the applied force during cutting.

A standardized numbering system indicating sheet metal thickness.

The degree to which the cut edges of a sheared blank are perpendicular to one another and to the material surface.

The process of separating the sheared blank from the sheet skeleton after a cut.

The permissible deviation from a specified cut dimension, typically expressed as a plus or minus value in inches or millimeters.

The metal stock being processed by the shear, characterized by its alloy, temper, thickness, and surface condition.