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.Keys are made of ductile materials.
What are types of keys in machine design?
There are five main types of keys: sunk, saddle, tangent, round, and spline.
What is key design?
Key design characteristics (KDCs) are important information related to the product and part designs, which significantly influence on the product’s functions, performances, and quality.These identified KDCs can help designers to understand the relationships between KDCs and PDS and rapidly develop a design scheme.
What is flat key in machine design?
A flat key, as shown in figure- is used for light load because they depend entirely on friction for the grip. The sides of these keys are parallel but the top is slightly tapered for a tight fit. Theses keys have about half the thickness of sunk keys.
What is the difference between saddle and sunk keys?
Compared to sunk keys, saddle keys are not sunk into the shaft and hub instead they are only sunk into the hub. They either sit on a flat or circumference of the shaft. Power transmission is achieved through friction between the shaft and the key.
How many types of key are there?
Five types of keys are there on the keyboard there are Alphanumeric Key, Punctuation Keys, Navigation keys, Command keys, Special Keys.
What is key & keyways explain different types of keys?
As we said above Key is a part of a machine or equipment where it is used to connect the rotating machine element(Hub/Pulley) to the shaft and enables the torque transmission.this is called Keyway. These keys are temporary fastening elements and are subject to the crushing and the shearing stress.
What is machine designing?
Machine design is an area of study in which one learns to design machine parts by utilizing its whole knowledge and experience in field of mechanical engineering. OBJECTIVES OF DESIGN. DESIGN FOR STRENGTH- safety is first so part to be designed should strong enough to withstand forces in its service.
What are the key design features?
10 Basic Elements of Design
- Line. The first and most basic element of design is that of the line.
- Color. Save.
- Shape. Shapes, geometric or organic, add interest.
- Space.
- Texture.
- Typography.
- Scale (Size)
- Dominance and Emphasis.
What is key steel used for?
Key Steel is widely used for many general engineering applications. Typical key steel applications include taper, gibhead, plain and parallel keys.
What is a feather key?
Definition of feather key
in machinery. : a sunk key without taper that is permanently fixed in one of the connected pieces and that is a sliding fit in a keyway in the other so as to permit relative longitudinal motion. called also spline.
What is saddle key?
Definition of saddle key
: a key for securing a member to a machine shaft that fits into a keyway in the secured member and is concave to grip the shaft by friction compare flat key, sunk key.
What is a sunk key?
Definition of sunk key
: a key that fits into keyways in both the shaft and the secured member in machinery compare saddle key.
What is Kennedy key?
The Kennedy key consists of two square keys. The hub is bored off the centre and the two keys force the hub and the shaft to a concentric position. Kennedy key is used for heavy duty applications.
What is machine design shaft?
The term shaft usually refers to a component of circular cross section that rotates and transmits power from a driving device, such as a motor or engine, through a machine. Shafts can carry gears, pulleys, and sprockets to transmit rotary motion and power via mating gears, belts, and chains.
What are woodruff keys used for?
A woodruff key is a half?moon shaped machine key that prevents gears, hubs, or other components from moving independently of a rotating shaft or spindle. They also act as a fail?safe that protects expensive parts by shearing under excessive loads.
What is SQL key?
An SQL key is either a single column (or attribute) or a group of columns that can uniquely identify rows (or tuples) in a table. SQL keys ensure that there are no rows with duplicate information. Not only that, but they also help in establishing a relationship between multiple tables in the database.
What are the 7 special keys in keyboard?
- Ctrl-I – make italic (this is italic)
- Ctrl-B – make bold (this is bold)
- Ctrl-U – underline (this is underlined)
- Ctrl-Right Arrow – move the cursor to the start of the next word.
- Ctrl-Left Arrow – move the cursor to the start of the previous word.
- Ctrl-Down Arrow – move the cursor to the start of the next paragraph.
What are the types of keys in computer?
The keys on your keyboard can be divided into several groups based on function:
- Typing (alphanumeric) keys. These keys include the same letter, number, punctuation, and symbol keys found on a traditional typewriter.
- Control keys.
- Function keys.
- Navigation keys.
- Numeric keypad.
Why is it called a Woodruff key?
ETYMOLOGY OF THE WORD WOODRUFF KEY
Named after the Woodruff Manufacturing Co, in Hartford, Connecticut, who first manufactured it in 1892.
What are keys and splines?
Abstract. Splines and keys are machinery components placed at the interface between shafts and hubs of power-transmitting elements. A spline (or key) is usually machined (or attached) onto the shaft of a power-transmitting pair, and the corresponding groove is cut into the hub.
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