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Henry Marcus Quackenbush (April 27, 1847 – September 8, 1933), commonly called "H.M.", was an American inventor and industrialist who founded the H.M. Quackenbush Company [1] in Herkimer, New York. His company was widely known for its air rifles and for the invention of the metal, spring-jointed nutcracker . [ 2 ]
The Quackenbush Hardware Store, located in Eugene, Oregon, is listed on the National Register of Historic Places. [1] The store opened in 1903 under the name J. W. Quackenbush's , selling farm implements, hardware, and horse-drawn vehicles.
Jacob's Chuck – drill chucks; JOBOX – truck boxes and site storage; K-D Tools – mechanic's hand and specialty tools; K&F – files and rasps; Kahnetics – Dispensing systems. Lufkin – Manufactures measuring tools such as calipers, gauges, micrometers, and measuring tapes. Lufkin was Cooper's first hand tool acquisition in 1967.
While modern nuts and bolts are routinely made of metal, this was not the case in earlier ages, when woodworking tools were employed to fashion very large wooden bolts and nuts for use in winches, windmills, watermills, and flour mills of the Middle Ages; the ease of cutting and replacing wooden parts was balanced by the need to resist large amounts of torque, and bear up against ever heavier ...
A pin chuck is a specialized chuck designed to hold small drills (less than 1 mm (0.039 in) in diameter) that could not be held securely in a normal drill chuck. The drill is inserted into the pin chuck and tightened; the pin chuck has a shaft which is then inserted into the larger drill chuck to hold the drill securely.
Below is a comprehensive drill and tap size chart for all drills and taps: Inch, imperial, and metric, up to 36.5 millimetres (1.44 in) in diameter. In manufactured parts, holes with female screw threads are often needed; they accept male screws to facilitate the building and fastening of a finished assembly.