tHREAD- GHALAVIZ
Hand and machine taps are tools used to create internal threads in metal, plastic, or polymer parts, typically made from high-speed steel HSS or carbide. Hand taps usually come in three types: taper, intermediate, and bottoming taps, used respectively for starting, continuing, and finishing the threading process. The thread angle in both types is typically 60 degrees, following common standards such as ISO, DIN, UN, and BSW. Tap lengths range from 40 to 120 millimeters and feature straight or spiral flutes for chip removal. Hand taps have a square shank for use with a tap wrench, while machine taps have a cylindrical shank for chuck mounting.
Machine taps are designed for use in power tools such as drills, CNC machines, or lathes and are capable of operating at high speeds. The cutting speed for machine taps typically ranges from 10 to 30 meters per minute depending on the workpiece material. Precision-ground cutting edges and coatings such as TiN or TiCN significantly increase tool life. Unlike hand taps, machine taps are usually single-piece tools and do not require multiple passes. The recommended pilot hole diameter is generally about 85 to 90 percent of the tap’s nominal diameter. These taps are widely used in aerospace, automotive, mold-making, and high-volume manufact
