Thread mills are tools designed to cut threads by milling. Thread mills are used on numerically controlled machining centers (NC) that have simultaneous, triaxle control and helical interpolation functions. In comparison to general tapping, thread milling is more stable with less cutting condition limitations in terms of chip management and coolant lubricity.
A-Tap is an all-purpose tap series designed to simplify tool management and to excel in a wide variety of materials and applications. A-Tap is made from powdered metal HSS and has OSG's patented V coating to achieve excellent wear resistance. The spiral flute series has adopted a variable helix flute design, which encourages stable chip evacuation and reduces cutting forces.