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Eccentric bottom bracket on a Burley tandem bicycle held in place with two set screws. The term is also used to refer to the device often used on tandem bicycles with timing chains, single-speed bicycles with a rear disc brake or an internal-geared hub, or any bicycle with vertical dropouts and no derailleur, to allow slight repositioning, fore and aft, of a bottom bracket to properly tension ...
In the four-rotor version, eccentric 1 and 2 as well as 3 and 4 are opposed (180°), meaning that the eccentrics for rotors 2 and 3 are only 90° apart from one another, causing significant stress on the centre bearing. However, by designing the eccentric shaft with a bigger diameter, this problem was resolved. [6]
As a replacement for the ageing Triumph Tiger Cub, the TR25W Trophy was introduced in 1968. (The "W" in the model designation stood for "woodsman") [ 37 ] The machine shared the chassis of the Starfire, but used 19" wheels front and rear, with a steel Triumph tank and side panels, high bars and a high level exhaust on the right hand side.
Parts books were often issued as microfiche, though this has fallen out of favour. Now, many manufacturers offer this information digitally in an electronic parts catalogue. This can be locally installed software, or a centrally hosted web application. Usually, an electronic parts catalogue enables the user to virtually disassemble the product ...
The balance shaft runs off the small gear on the left (the large gear is for the camshaft, causing it to rotate at half the speed of the crankshaft). Balance shafts are often used in inline-four engines , to reduce the second-order vibration (a vertical force oscillating at twice the engine RPM ) that is inherent in the design of a typical ...
Sealed cartridge bottom brackets are normally two pieces, a unit holding the spindle and bearings that screws into the bottom bracket shell from the drive side and a screw-in support cup (often made of light alloy or plastic) that supports the spindle and bearing assembly on the non-drive side.