Keys And Coupling Design Pdf

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Shafts are indispensable mechanical power transmission elements that are mainly used in for transmitting rotary motion and torque from one point to another point. The various other mechanical elements like gears, cams, sprockets, etc.

Machine Design

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Key is a machine element which is used to connect the transmission shaft to rotating machine elements like pulley, gear, sprocket or flywheel. Keys provide a positive means of transmitting torque between shaft and hub of the mating element. A slot is machined in the shaft or in the hub or both to accommodate the key is called keyway. Keyway reduces the strength of the shaft as it results in stress concentration. Keys are made of ductile materials. Commonly used materials for a key are hardened and tempered steel of grades C30, C35, C40, C50 and 55Mn75 etc.

In mechanical engineering, a key is a machine element used to connect a rotating machine element to a shaft. The key prevents relative rotation between the two parts and may enable torque transmission. For a key to function, the shaft and rotating machine element must have a keyway and a keyseat, which is a slot and pocket in which the key fits. The whole system is called a keyed joint. There are five main types of keys: sunk , saddle , tangent , round , and spline.

Keys and Coupling (Design for a Simple Rigid Flanged Coupling)

A 2-in. Key has lowest yield strength. A cast-iron pulley transmits The as-rolled shaft to which it is to be keyed is 1 in. Compute the length of flat key and of square key needed. Pulley has the highest compressive strength Cast iron.

Orthwein, W. April 1, April ; 2 : — A review of the history of the analysis of torsionally induced shaft stresses due to the inclusion of an empty keyway, or keyseat, is given with emphasis placed upon experimentally measured values. More realistic stresses recently found by photoelastic analysis of a shaft in which the keyways were not empty are then presented. A new, patented U.

Shaft Keys - Types and Their Design

Solution: A shaft is a rotating machine element which is used to transmit power from one place to another. Torque or twisting moment set up within the shaft permits the power to be transferred. To transfer power from one shaft to another, various members like pulleys, gears etc. Various members are mounted on the shaft by means of keys or splines.

The most common types of keys are the square and rectangular parallel keys.

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4 Response
  1. Corey L.

    Design of Flange Coupling. Flexible Coupling. Bushed Pin Flexible. Coupling. Oldham Coupling. Universal.

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