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  2. Harbor Freight Tools - Wikipedia

    en.wikipedia.org/wiki/Harbor_Freight_Tools

    On January 9, 2013, CEO Eric Smidt, through Harbor Freight Tools, donated $1.4 million of tools and equipment to the Los Angeles Unified School District's (LAUSD) Career Technical Education. [17] In 2016, Eric Smidt formed The Smidt Foundation to house Harbor Freight Tools for Schools and support other education, health, safety, and community ...

  3. Z-drag - Wikipedia

    en.wikipedia.org/wiki/Z-drag

    A Z-Drag or Z-Rig is an arrangement of lines and pulleys, effectively forming a block and tackle, that is commonly used in rescue situations. [1] The basic arrangement results in pulling the hauling end 3 times the distance the load is moved, providing a theoretical mechanical advantage of three to one .

  4. Block and tackle - Wikipedia

    en.wikipedia.org/wiki/Block_and_tackle

    Diagram 3 shows three rope parts supporting the load W, which means the tension in the rope is W/3. Thus, the mechanical advantage is three-to-one. By adding a pulley to the fixed block of a gun tackle the direction of the pulling force is reversed though the mechanical advantage remains the same, Diagram 3a. This is an example of the Luff tackle.

  5. List of tool manufacturers - Wikipedia

    en.wikipedia.org/wiki/List_of_tool_manufacturers

    Snap-on, Bahco, Blue-Point, Williams, CDI Torque Products, [27] Sun diagnostic tools in Europe and Brazil: Hand tools, air tools, power tools, diagnostic tools, assorted automotive tools Sortimo: Zusmarshausen, Germany: Sortimo: in-vehicle equipment, storage system for parts and tools Stanley Black & Decker: Connecticut, US

  6. Puretic power block - Wikipedia

    en.wikipedia.org/wiki/Puretic_power_block

    The power block is a large pulley of aluminium with a hard rubber-coated sheave. While many men were needed for the back-breaking work of hauling a purse seine manually, the same work could be done by fewer men with a power block. [1] The Puretic power block revolutionized the technology of hauling fishing nets, particularly purse seine nets.

  7. Drill - Wikipedia

    en.wikipedia.org/wiki/Drill

    Some drill presses add a third stepped pulley to increase the number of available speeds. Modern drill presses can, however, use a variable-speed motor in conjunction with the stepped-pulley system. Medium-duty drill presses such as those used in machine shop (tool room) applications are equipped with a continuously variable transmission. This ...

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