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2. Component parts of internal combustion engines - Wikipedia

   en.wikipedia.org/wiki/Component_parts_of...

   Internal combustions engines require lubrication in operation that moving parts slide smoothly over each other. Insufficient lubrication subjects the parts of the engine to metal-to-metal contact, friction, heat build-up, rapid wear often culminating in parts becoming friction welded together e.g. pistons in their cylinders.

3. Roller chain - Wikipedia

   en.wikipedia.org/wiki/Roller_chain

   Roller chain and sprocket The sketch of roller chain, Leonardo da Vinci, Codex Atlanticus. Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles.

4. Chainsaw - Wikipedia

   en.wikipedia.org/wiki/Chainsaw

   A chain brake activator is located forward of the upper handle and is activated by a kickback event. When triggered, it tensions a band around the clutch drum, stopping the chain within milliseconds. A chain catcher is located between the saw body and the clutch cover. In most cases, it resembles a hook made of aluminum.

5. Chain drive - Wikipedia

   en.wikipedia.org/wiki/Chain_drive

   Chain drive was the main feature which differentiated the safety bicycle introduced in 1885, with its two equal-sized wheels, from the direct-drive penny-farthing or "high wheeler" type of bicycle. The popularity of the chain-driven safety bicycle brought about the demise of the penny-farthing, and is still a basic feature of bicycle design today.

6. Comcast stock falls after management warns broadband ...

   www.aol.com/finance/comcast-stock-falls...

   Comcast shares closed down nearly 10% Monday after Dave Watson, president and CEO of Comcast Cable, said the company expects broadband subscribers to decline by over 100,000 in the current quarter.

7. List of bicycle parts - Wikipedia

   en.wikipedia.org/wiki/List_of_bicycle_parts

   Chain tensioner: a device to maintain proper chain tension; Chaintug: a device to aid in setting the proper chain tension; Cluster: a bicycle cogset, either a freewheel, or cassette; Cogset: the set of rear sprockets that attaches to the hub on the rear wheel; Cone: holds bearings in place, pressed against the cup; Cotter: pin for attaching ...