Twist drills do not make accurately sized or good finish holes; a reamer of some type is often used to cut the final size and finish. A reamer will not make the original hole; it will only enlarge a ...

Taps are used to cut female threads on the inside of holes, a process called tapping. Similar in appearance to a screw, taps have threads that are used to cut into the material being tapped as the tap ...

The strength of some internal threads is more sensitive to tap diameter than previously thought. • Cold-formed threads are no stronger than cut threads when holes are correctly sized. • Cut threads ...