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Pass-through sockets and ratchets are built for 1 ⁄ 4-inch, 3 ⁄ 8-inch and 1 ⁄ 2-inch sets in both SAE and metric sizes. By using a fine tooth ratchet and socket system that allow a pass-through ratchet to be used as a conventional ratchet handle with interchangeable 1 ⁄ 4-inch and 3 ⁄ 8-inch drives some ratchets can be used with ...
For example, this allows a 1 ⁄ 2-inch (13 mm) bit to be used in a pistol-grip drill's 3 ⁄ 8-inch (9.5 mm) chuck. One particular type of reduced-shank drill bits are Silver & Deming ( S&D ) bits, whose sets run from 9 ⁄ 16 -inch (14 mm) to 1 + 1 ⁄ 2 -inch (38 mm) drill body diameter with a standard 1 ⁄ 2 -inch (13 mm) reduced shank for ...
A drill chuck is a specialised self-centering, three-jaw chuck, usually with capacity of 0.5 in (13 mm) or less, and rarely greater than 1 in (25 mm), used to hold drill bits or other rotary tools. This type of chuck is used on tools ranging from professional equipment to inexpensive hand and power drills for domestic use.
A spade drill bit for metal is a two part bit with a tool holder and an insertable tip, called an insert. The inserts come in various sizes that range from 7 ⁄ 16 to 2.5 inches (11 to 64 mm). The tool holder usually has a coolant passage running through it. [13] They are capable of cutting to a depth of about 10 times the bit diameter.
Square head cap screws up to and including 3 ⁄ 4 inch (19.05 mm) have a head 1 ⁄ 8 inch (3.175 mm) larger than the shank; screws larger than 3 ⁄ 4 inch (19.05 mm) have a head 1 ⁄ 4 inch (6.35 mm) larger than the shank. [9] In 1919, Dyke defined them as screws that are threaded all the way to the head. [10] socket screw
Set screws can successfully hold against heavy-torque applications if the details are right. For example, endmill holders of the solid type typically use large set screws holding against flats to fasten the endmill, and heavy loads are resisted. However, small set screws without flats are prone to spinning and galling if overloaded.