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2. Cable logging - Wikipedia

   en.wikipedia.org/wiki/Cable_logging

   High Lead logging in Western Oregon Cable grue Larix 3T, installed on agricultural tractor. Cable logging, also referred to as skyline logging, is a logging method primarily used on the West Coast of North America with yarder, loaders, and grapple yarders, but also in Europe (Austria, Switzerland, Czech Republic, France, Italy).

3. Spike puller - Wikipedia

   en.wikipedia.org/wiki/Spike_puller

   A spike puller can be seen on the right side of this image. A spike puller is a railroad maintenance of way machine designed to remove rail spikes from ties. [1] The spike puller automates the task of spike removal, allowing it to be done at a rate greater than can be achieved by hand.

4. Harmonic damper - Wikipedia

   en.wikipedia.org/wiki/Harmonic_damper

   Harmonic balancer lower pulley on a four-cylinder engine. A harmonic damper is a device fitted to the free (accessory drive) end of the crankshaft of an internal combustion engine to counter torsional and resonance vibrations from the crankshaft. This device must be an interference fit to the crankshaft in order to operate in an effective ...

5. Underdrive pulleys - Wikipedia

   en.wikipedia.org/wiki/Underdrive_pulleys

   Additional and significant performance improvements can be seen by reducing the weight of the pulley versus the original pulley. Gains can range from 3 to 6 HP per pound of weight reduced. Poorly engineered underdrive pulleys can cause unwanted side effects; this is due to not spinning the alternator , power steering, and/or air conditioning ...

6. Mechanical advantage device - Wikipedia

   en.wikipedia.org/wiki/Mechanical_advantage_device

   Examples of rope and pulley systems illustrating mechanical advantage. Consider lifting a weight with rope and pulleys. A rope looped through a pulley attached to a fixed spot, e.g. a barn roof rafter, and attached to the weight is called a single pulley. It has a mechanical advantage (MA) = 1 (assuming frictionless bearings in the pulley ...

7. Drawworks - Wikipedia

   en.wikipedia.org/wiki/Drawworks

   A drawworks is the primary hoisting machinery component of a rotary drilling rig.Its main function is to provide a means of raising and lowering the traveling block.The wire-rope drill line winds on the drawworks drum and over the crown block to the traveling block, allowing the drill string to be moved up and down as the drum turns.