A gear hobbing machine is a specialized machine tool used for producing gears, splines, and sprockets. It employs a generating process where a rotating, multi-toothed cutting tool called a hob and a gear blank rotate in a synchronized, continuous motion. As the hob is fed into the blank, it progressively cuts and forms the teeth, making it a highly efficient and accurate method for mass production of various gear types. 

A milling machine is a versatile machine tool used in metalworking and manufacturing to remove material from a workpiece using rotating cutting tools. It is commonly used to produce parts with precise shapes, dimensions, and surface finishes.

A lathe machine is a fundamental machine tool used primarily for shaping and machining materials—usually metals, wood, or plastics—by rotating the workpiece against a stationary cutting tool. 

A slotting machine (or slotter) is a machine tool primarily used for cutting slots, keyways, and other internal shapes in a workpiece using a reciprocating (up and down) motion of the cutting tool. 

A hydraulic press is a machine that uses hydraulic force to generate a large amount of compressive force for shaping, forming, or compressing materials. It operates based on Pascal’s Law, which states that pressure applied to a confined fluid is transmitted equally in all directions. 

GTAW, also known as TIG welding (Tungsten Inert Gas welding), is a welding process that uses a non-consumable tungsten electrode to produce the weld. A GTAW welding machine is the equipment used to perform this process and is known for producing precise, high-quality welds, especially on thin materials and non-ferrous metals like aluminum, magnesium, and stainless steel.