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A historic version of the Vise-Grip brand locking pliers. Locking pliers (also called Vise-Grips, Mole wrench or Mole grips) are pliers that can be locked into position, using an "over-center" cam action. Locking pliers are available with many different jaw styles, such as needle-nose pliers, wrenches, clamps and various shapes to fix metal ...
Mole branded Self-grip wrench locking pliers. Thomas Robb Coughtrie (25 November 1917 – 27 August 2008) was a chartered engineer from Motherwell, Lanarkshire, Scotland.. He was credited by The Times as the inventor of the self-grip Mole wrench [1] although this conflicts with other sources which show the invention of the Vise-Grip locking pliers [2] in Nebraska, United States, with an ...
A bench vise, B machine vise, C hand vise. A vise or vice (British English) is a mechanical apparatus used to secure an object to allow work to be performed on it.Vises have two parallel jaws, one fixed and the other movable, threaded in and out by a screw and lever.
The hard teeth bite into the softer metal of the round pipe and provide the grip needed to turn a pipe, even against fair resistance. The design of the adjustable jaw, which permits a certain amount of intentional play out of square , allows it to bind on the pipe, with forward pressure on the handle pulling the jaws tighter.
Square threads are named after their square geometry. They are the most efficient, having the least friction, so they are often used for screws that carry high power; however, they are also the most difficult to machine, and are thus the most expensive.
A 1909 ad for the Belknap Hardware and Manufacturing Company. The Belknap Hardware and Manufacturing Company, also known as the Belknap Hardware Company or simply Belknap Hardware, was at one time a leading American manufacturer of hardware goods and a major wholesale competitor of retail sales companies Sears, Roebuck, and Company and Montgomery Ward.
By 1992, IronMind had moved all design and production of its grippers in-house. [14] The next generation of the Silver Crush Grippers, released in 1993, marked the next major step in gripper evolution; their stainless-steel handles replaced the previous chrome-plated mild steel handles, and a new assembly technique eliminated the drift pin central to the design of the older grippers. [15]
A lathe of 1871, equipped with leadscrew and change gears for single-point screw-cutting A Brown & Sharpe single-spindle screw machine. Fasteners had become widespread involving concepts such as dowels and pins, wedging, mortises and tenons, dovetails, nailing (with or without clenching the nail ends), forge welding, and many kinds of binding with cord made of leather or fiber, using many ...
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