Drill bit shank from 0 to 7. The Morse taper allows the bit to be mounted directly into the spindle of a drill, lathe tailstock, or (with the use of adapters) into the spindle of milling machines. It is a self-locking (or "self holding") taper of approximately 5/8" per foot that allows the torque to be transferred to the drill bit by the friction between the taper shank and the socket. The tang at the end of the taper is only for ejecting the drill bit from the spindle, with the aid of a drift. The arbor of a drill chuck is often
Fear Is the Key Fear Is the Key Fear Is the Key is a 1961 first-person narrative thriller novel by Scottish author Alistair MacLean. In the prologue, set in May 1958, John Talbot, owner of Trans Carib Air Charter Co is at an airfield in British Honduras, awaiting radio contact with one of his aircraft en route to Tampa, Florida. Not long after establishing contact the aircraft is attacked by a P-51 Mustang, after which all contact is lost. Two years later, Talbot is on trial for robbing a bank. At a point where his guilt is in doubt, new information comes to light