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Replacement chainrings must be chosen with a bolt-hole count and spacing that matches the spider. Chainrings designed for use with multi-chainring crank arms may have ramps or pins to aid in shifting. The middle chainring, in the case of a triple crankset, usually has the most shaping to aid in shifting up and down.
Charging handle being pulled on an M2 machine gun. The cocking handle, also known as charging handle or bolt handle, is a device on a firearm which, when manipulated, results in the bolt being pulled to the rear, putting the hammer/striker into a spring-loaded ("cocked") "ready and set" position, allowing the operator to open the breech and eject any spent/unwanted cartridge/shell from the ...
A bolt can function as a clevis pin, but a bolt is not intended to take the lateral stress that a clevis pin must handle. Normal bolts are manufactured to handle tension loads, whereas clevis pins and bolts are designed to withstand shearing forces. The sheering strength of a threaded bolt is determined by its inner thread diameter.
On firearms where the cocking handle is permanently connected to the bolt/bolt carrier, a forward assist device is not necessary as the bolt can be assisted forwards by simply pushing or tapping the cocking handle forwards. [1] [5] The forward assist is generally not necessary as a standard procedure on any firearm. An exception is the British ...
The 2.2l S10/Sonoma had the starter located in the same position as front wheel drive cars. A rear wheel drive bellhousing is displayed at right, and the integrated front wheel drive bellhousing is displayed at the lower right (in this case, as a part of the GM 6T70 Transmission). GM 60-Degree 2.8/3.1/3.4/3.5/3.9 L V6 (also used by AMC) Buick ...
The lower half of the main bearings are typically held in place by 'bearing caps' which are secured to the engine block using bolts. The basic arrangement is for each bearing cap to have two bolts, but some engines may have four or six bolts per bearing cap (often referred to as "four-bolt mains" or "six-bolt mains" engines).
Deore XT is a mountain and touring bike groupset first introduced by Shimano in 1983. [1] It was Shimano's first mountain bike groupset, based on their existing Deore touring groupset, and it consisted of a triple-, double- or single chainring crankset, front and rear derailleurs, handlebar-mounted "finger" shifters, cantilever brakes, and large-flange hubs. [1]
Biopace is a tradename for a type of ovoid bicycle chain ring manufactured by Shimano from 1983 to 1993 [1] [2] The design was intended to help overcome the "dead zone" where the crank arms are vertical and riders have little mechanical advantage. [3] Biopace chainrings have a reduced chainring diameter coinciding with the cranks being horizontal.