Types of Mechanical Keys Shaft Key Types of Key Sunk, Saddle, Gibs Head, Flat, Round, Taper
What is Sunk Key? Contents show The term "sunk key" refers to a key that fits into keyways both in the shaft and in the secured member of the machinery. Simply put, these are keys in which one half fits into the pulley's keyway while the other half rests in the shaft's keyway.
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This type of sunk key has a uniform height throughout the key at both ends. So it is named parallel keys. Tapered keys. Like parallel keys, this sunk key type doesn't have a uniform height, instead, they are tapered at the upper surface in the ratio of 1:100. So they are called tapered keys.
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1. Sunk Keys Sunk Keys When a key is provided with the half portion in the shaft and the other half portion in the hub, then the key is known as the Sunk Key. There are different varieties in the sunk key itself. Rectangular Sunk key Square Sunk Key Parallel Sunk Key Gib Headed Sunk Key Feather Sunk Key i) Rectangular Sunk key Rectangular Sunk key
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Many ways to classify the keys. so let we check it out types of keys below : Saddle key and Sunk key. Square key and Flat key. Taper key and Parallel key. Key with and without Glib-head. There are some special types of keys are also available. some of the special types of keys are given below : Woodruff key.
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Types of Shaft Keys Definition, Use, Function, Advantages & Disadvantages Engineering Learn
A key is usually made from steel and is inserted or mounted between the shaft and the hub of the component in an axial direction to prevent relative movement. Keyseat is a recess in the shaft, and the Keyway is the recess in the hub to receive the key and thus securely lock the component.
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Parallel sunk key: If no taper is provided on the rectangular or square sunk key, it is called parallel sunk key i.e. it is uniform in width and thickness throughout. It is used where the pulley, gear or other mating piece is required to slide along the shaft.
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ENGINEERING DRAWING
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A sunk key is a key that fits into keyways in both the shaft and the secured member in machinery. Sunk keys are sunk into the shaft for half its thickness, where the measurement is taken at the side of the key. There are six main types of Sunk keys: Rectangular sunk key Square sunk key Parallel sunk key Gib head key Feather key Woodruff key 1.
What Is a Woodruff Key? Why Use a Woodruff Key? Sunk Keys
1. Rectangular sunk key. A rectangular sunk key is shown in Fig. 1. The usual proportions of this key are : Width of key, w = d / 4 ; and thickness of key, t = 2w / 3 = d / 6 where d = Diameter of the shaft or diameter of the hole in the hub. The key has taper 1 in 100 on the top side only. Fig. 1 Rectangular sunk key. [sam_block id="2″]
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Taper and round-ended sunk key and keyway acc. to ISO 6886 Dimensions of parallel keys and taper keys 1) The tolerance zone for hub keyway width b for parallel keys with normal fit is ISO JS9 and with close fit ISO P9. The tolerance zone for shaft keyway width b with normal fit is ISO N9 and with close fit ISO P9.
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Sunk key Types of sunk keys: rectangularparallel sunkgib-headfeather, and Woodruff Parallel keys Parallel keys are the most widely used. They have a square or rectangular cross-section.
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Taper 1:100 in a sunk key means that the key tapers by 1/100th of an inch for every inch of length. For example, if the key is four inches long, it will taper by 0.04 inches. This taper allows the key to fit securely in the mortise, providing a strong and secure connection between the shaft and the hub.
JOINTS Adhesive joints Soldered joints Detachable joints
of taper key as following: 1- Sunk taper key The standard form of this key either of rectangular or square cross-sections. It is sunk in shaft to the depth of one-half its nominal thickness, the remaining portion fits in the keyway inside the hub. Approximately proportions of a sunk taper key of rectangular cross-section; if the
Sunk Key Types, Advantages, Disadvantages, Uses
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Tapered or rectangular are the most common shape of shaft key. They keyway which is a slot provided in hub of a gear, sprocket, pulley and various rotating power devices which can receive key. The slot in hub is cut on key seating machines by milling, shaping, broaching, slotting and planning.
