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Slot screw drives have a single horizontal indentation (the slot) in the fastener head and is driven by a "common blade" or flat-bladed screwdriver.This form was the first type of screw drive to be developed, and, for centuries, it was the simplest and cheapest to make because it can just be sawed or filed.
Screwdriver bits in different sizes for Robertson screws. When Henry Ford tried the Robertson screws, he found that they saved considerable time in Model T production. When Robertson refused to license the design, Ford realized that the supply of screws would not be guaranteed, and chose to limit their use to his Canadian division. [4] [5] [6]
A wide variety of power screwdrivers ranges from a simple "stick"-type with batteries, a motor, and a tip holder all inline, to powerful "pistol" type VSR (variable-speed reversible) cordless drills that also function as screwdrivers. This is particularly useful as drilling a pilot hole before driving a screw is a common operation.
Milwaukee tools today are manufactured globally in China, Germany, Mexico, the United States, and Vietnam. [6] The tools produced include corded and cordless power tools, hand tools, pliers, hand saws, screwdrivers, utility knives, impact drivers, and more. Primary Milwaukee Tool product lines include the M12, M18, MX FUEL, and PACKOUT tool ...
An External Torx version exists, also known as Inverted Torx, where the screw head has the shape of a Torx screwdriver bit, and a Torx socket is used to drive it. The external "E" Torx nominal sizing does not correlate to the "T" size, (e.g. an E40 socket is too large to fit a T40 Torx bit, while an E8 Torx socket will fit a T40 Torx bit [6]).
Screwdriver manufacturers have claimed to have solve the problem of combination screws by offering special screwdrivers that will fit the combination screws. For example Klein offers "Combo-Tip Driver 7314" without telling which type of combination screw it is intended to fit. [ 1 ]
The trade name "Yankee" screwdriver was first marketed by North Brothers Manufacturing Company in ≈16 April 1895, with the No. ≠130 spiral ratchet screwdriver. Yankee soon became and still is a well-known name in automatic spiral ratchet screwdrivers , with several other models, and model improvements patented by North Bros. over a 40-year ...
Eventually the success of the Yankee line of tools led the Stanley Works tool company to acquire the North Bros. in 1946, chiefly to improve their own product lines. Stanley was primarily interested in their bit and brace designs, which continued to be produced unchanged at Stanley for decades, and the spiral ratchet "Yankee" screwdrivers. The ...
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