The type of press used is in direct correlation with the final product. The press types are straight side, BG (back geared), geared, separation, OBI (open back tilt) and OBS (open back stationary). Hydraulic and mechanical presses are classified according to the frame on which the moving elements are mounted. The most common are the open frame vise, also known as a C-frame, and the straight side vise. A straight-sided press has vertical columns on each side of the machine and eliminates angular deflection. A C-frame allows easy access to the die area on three sides and requires less floor space. An open frame type, the OBI pivots the frame to facilitate unloading of debris or parts. The OBS timed air jets, devices or conveyors for unloading scrap or part.[7]​[8]​.

Historically, metal was shaped by using a hammer by hand. Later, larger hammers were built to press more metal at a time or to press thicker materials. Often, a blacksmith would hire a helper or apprentice to swing the hammer while the blacksmith concentrated on setting the workpiece. Drop hammers and trip hammers use a mechanism to lift the hammer, which then falls by gravity onto the material being worked on.

By the middle of the century, manual and rotary cam hammers began to be replaced in industry by the pile hammer, which was first described in 1784 by James Watt, a Scottish inventor and mechanical engineer who also contributed to early steam engines and condensers. but not built until 1840 by the British inventor James Nasmyth. By the end of the century, steam hammers had increased considerably in size; In 1891, the Bethlehem Iron Company made an improvement that allowed a steam hammer to deliver a blow of 125 tons.[9]​.

Most modern machine presses typically use a combination of electric and hydraulic motors to achieve the necessary pressure. Along with the evolution of presses came the evolution of the dies used in them.[10]​.

Mechanical presses can be dangerous, so safety measures should always be taken. Two-hand controls (controls that require both hands to be on the buttons to operate) are a very good way to prevent accidents, as are light sensors that prevent the machine from operating if the operator is within range of the pressure piece.

The type of press used is in direct correlation with the final product. The press types are straight side, BG (back geared), geared, separation, OBI (open back tilt) and OBS (open back stationary). Hydraulic and mechanical presses are classified according to the frame on which the moving elements are mounted. The most common are the open frame vise, also known as a C-frame, and the straight side vise. A straight-sided press has vertical columns on each side of the machine and eliminates angular deflection. A C-frame allows easy access to the die area on three sides and requires less floor space. An open frame type, the OBI pivots the frame to facilitate unloading of debris or parts. The OBS timed air jets, devices or conveyors for unloading scrap or part.[7]​[8]​.

Historically, metal was shaped by using a hammer by hand. Later, larger hammers were built to press more metal at a time or to press thicker materials. Often, a blacksmith would hire a helper or apprentice to swing the hammer while the blacksmith concentrated on setting the workpiece. Drop hammers and trip hammers use a mechanism to lift the hammer, which then falls by gravity onto the material being worked on.

By the middle of the century, manual and rotary cam hammers began to be replaced in industry by the pile hammer, which was first described in 1784 by James Watt, a Scottish inventor and mechanical engineer who also contributed to early steam engines and condensers. but not built until 1840 by the British inventor James Nasmyth. By the end of the century, steam hammers had increased considerably in size; In 1891, the Bethlehem Iron Company made an improvement that allowed a steam hammer to deliver a blow of 125 tons.[9]​.

Most modern machine presses typically use a combination of electric and hydraulic motors to achieve the necessary pressure. Along with the evolution of presses came the evolution of the dies used in them.[10]​.

Mechanical presses can be dangerous, so safety measures should always be taken. Two-hand controls (controls that require both hands to be on the buttons to operate) are a very good way to prevent accidents, as are light sensors that prevent the machine from operating if the operator is within range of the pressure piece.