Spiral point taps, also called Gun taps, utilize an additional gash on the front of the tap which redirects chips forward towards the bottom or exit of the hole. Their design makes them ideally suited for through hole applications.
Straight flute taps, also called Hand taps, are designed for short chipping materials, such as cast iron. While their rigid design certainly makes them suitable for hand tapping operations, the straight flute configuration is also ideal for CNC tapping.
Forming taps, unlike cut taps that remove metal, work by compressing the work material to generate the desired thread. Because no chip is produced, breakage due to chip packing and bird nesting is eliminated. Form taps are ideally suited for both blind & through holes.
Pipe taps are used to produce internal threads to meet a variety of standards, including NPT, NPTF, NPS, NPSF and ANPT classifications. Features like helical flutes and interruptions on the tap itself help reduce tapping torque and extend tool life.
Round dies are utilized to produce threads on external shafts (Ex. Bolts). Size of the die typically dictates the design, in terms of whether it is solid round or split-round. OSG offers a complete line up of round dies, available in fractional, metric and pipe thread configurations.