the working strength of a tie rod is the product of the allowable working stress and the rod's minimum cross-sectional area. if threads are cut into a cylindrical rod, that minimum area occurs at the root of the thread. often rods are upset made thicker at the ends so that the tie rod does not become weaker when threads are cut into it.
a needle valve is a type of valve with a small port and a threaded, needle-shaped plunger. it allows precise regulation of flow, although it is generally only capable of relatively low flow rates. 1 construction and operation. construction and operation. an instrument needle valve uses a tapered pin to gradually open a space for fine control of .
although reducers are usually concentric, eccentric reducers are used as needed to maintain the top- or bottom-of-pipe level. a reducer can also be used either as a nozzle or diffuser, depending on the mach number of the flow. citation needed double-tapped bushing. a double-tapped bushing is a fitting which serves as a reducer.
a bolted joint between two elements may act as a bearing-type joint, or a friction joint. in the friction joint, the elements are clamped together with enough force that the resultant friction between the clamped surfaces prevents them from slipping laterally over each other.
multi-cylinder hydraulic cone crusher is mainly composed of main frame, eccentric shaft, crushing cone, mantle, bowl liner, adjusting device, dust ring, transmission device, bowl-shaped bearing, adjusting sleeve, hydraulic control system, hydraulic safety system, etc. the electric motor of the cone crusher drives the eccentric shaft to make .
a track bicycle or track bike is a form of fixed-gear bicycle optimized for racing at a velodrome or at an outdoor track. some road racing and club cyclists use a fixed-gear bicycle for training during the winter months, generally using a relatively low gear ratio, believed to help develop a good pedalling style.
a sheave / ʃ iː v / or pulley wheel is a grooved wheel often used for holding a belt, wire rope, or rope and incorporated into a pulley.the sheave spins on an axle or bearing inside the frame of the pulley. this allows the wire or rope to move freely, minimizing friction and wear on the cable.