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2. Come-along - Wikipedia

   en.wikipedia.org/wiki/Come-along

   A come-along. A come-along, also known as a power puller, is a hand-operated winch with a ratchet used to pull objects. The drum is wrapped with wire rope.A similar tool that uses a nylon strap is used to straighten trees, as it straightens gradually over time, therefore not splitting the trunk.

3. Cat's paw (tool) - Wikipedia

   en.wikipedia.org/wiki/Cat's_paw_(tool)

   New designs have been introduced, including the Nail Jack and Nail Hunter nail pullers, which take a pliers-like approach to the old cat's paw design. These tools contain their own built in fulcrum, but can also be struck with a hammer to drive the tips of the tool into the wood with very little damage, allowing them to dig out nails that have ...

4. Differential pulley - Wikipedia

   en.wikipedia.org/wiki/Differential_pulley

   It consists of two fixed pulleys of unequal radii that are attached to each other and rotate together, a single pulley bearing the load, and an endless rope looped around the pulleys. To avoid slippage, the rope is usually replaced by a chain, and the connected pulleys by sprockets .

5. Pillow block bearing - Wikipedia

   en.wikipedia.org/wiki/Pillow_block_bearing

   A pillow block bearing (or plummer block) is a mounting used to support a rotating shaft with the use of bearings and various accessories. The assembly consists of a mounting block which houses a bearing. [1] The block is mounted to a foundation, and a shaft is inserted, allowing the inner part of the bearing/shaft to rotate. [1]

6. Bearing (mechanical) - Wikipedia

   en.wikipedia.org/wiki/Bearing_(mechanical)

   A ball bearing. A bearing is a machine element that constrains relative motion to only the desired motion and reduces friction between moving parts.The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts.

7. Spherical bearing - Wikipedia

   en.wikipedia.org/wiki/Spherical_bearing

   A spherical bearing is a bearing that permits rotation about a central point in two orthogonal directions (usually within a specified angular limit based on the bearing geometry). Typically these bearings support a rotating shaft in the bore of the inner ring that must move not only rotationally, but also at an angle.