Machine tools are used for various processing work on different metals. Machining works like cutting, grinding, shaping machine to shape the metal workpiece, boring, slotting on metal through slotting machine, shearing and others are carried out by mechanical and electronic tools are known as tools. Previously in 18th century before the industrial revolution, these were made from the wood. The bulk production with precision accuracy evolved the mechanism to define metal parts from cast iron and wrought iron but still there are were limitations of hammering and to create required pressure on metal works. Gradually the further inventions as per the requirements for machining evaluated the old wooden or metal machineries to their existing form passing through several stages Previously manual pressure are used for machining tools that can be transformed to electrical pressure and mechanical pressure later on as the electricity invented. Earlier tools used flywheels with gears and levers for controlling. After the mid age of twentieth century Numerical controlled machineries and then CNC machineries were evaluated for better machining.
It is used to grind the metal and other materials. It is well recognized as a Grinder in the Industries. It consist the abrasive wheel, the rolling wheel used as a cutter. It cuts the metal in chips. The importance of this tool is to make the finishing of metal work piece by grinding the small chips from metal surface. The process through which the grinding machine removes metal is called as abrasion. Heat gets produced during this process. It requires coolant to cool down the metal piece. Various types are used in different industrial applications.
Belt grinding – It is used for grinding wood and metals to finish, debar and material removing.
Bench Grinder – manual tools used for finishing operation consisting two wheels of different grains.
Cylindrical grinder – with multiple grinding wheels to create cylinder shape of metal. Precision tubes, rods and bushing are generated through this grinder.
Surface Grinder – Most commonly grinder with manual use or CNC operated surface grinder. The work piece movement in back and forth grinds the surface of metal piece
There are many other types of grinder like tool and cutter grinder, jig grinder and gear grinder used to grind metal piece for different applications.