What Is Kennedy Key?

A square taper key fitted into a keyway of square section and driven from opposite ends of the hub.

What is Kennedy key give its applications?

Kennedy key is used for heavy duty applications. The analysis of the Kennedy key is based on two criteria which are failure due to shear stress and failure due to compressive stress. Since there are two keys, the torque transmitted by each key is one half of the total torque.

Which keys are used for heavy duty application?

Saddle key is more suitable than sunk key for heavy duty applications. Explanation: In sunk key, relative motion is also prevented by shear resistance of sunk key and hence sunk key is recommended.

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 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 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 the F1 key used for?

Opens the Help screen
F1 – Opens the Help screen for almost every program. F2 – Allows you to rename a selected file or folder. F3 – Opens a search feature for an application that is active at the moment. F4 – Alt + F4 closes the active window.

How are sunk key design?

A sunk key is a key in which half of the thickness of key fits into the keyway in the shaft and half in the keyway of the hub.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.

What is a shaft key?

The shaft Key is a small metallic component that plays a major role in connecting the shaft and hub with another rotational component such as gears, bearings, etc. Shaft keys are always parallel to the axial of the shaft. There are several types of shaft keys.

What is a crankshaft key?

Crankshaft keys (also called woodruff keys) are semicircular shaped, removable keys that fit into matching keyways cut into the crankshaft leaving protruding tabs. These tabs mate with matching slots on the harmonic balancer flush upon the shaft.

What is the main difference between sunk and saddle key?

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.

Where is feather key used?

Feather keys are used where the parts mounted on the shafts are required to slide along the shaft such as clutches for gear shifting devices. It is an alternative to a splined connection.

How do I get rid of the feather key?

The normal way to remove the key is to use a small cold chisel to impact the edge of the key in order to force it from its slot in the shaft. The exposed end of the key can be ground with a die grinder so that a “v” grove is formed in the end of the key.

Where and why the Woodruff key is used?

Woodruff Keys are used for locking gears and pulleys to shafts. On the shaft, they fit into a keyseat, which is a circular pocket that retains the key. An exposed portion of the key fits into a rectangular groove, often called the keyway, in the gear or pulley.

Why taper is provided on key?

(i)Taper keys : It is tapered (standard taper of this key is 1 in 100) in thickness but uniform in width. A taper key joint prevents relative rotational as well as axial movement between the two pieces.

What is the taper on a gib head key?

The taper of the key secures it in the assembly and provides a locked engagement with the shaft to the hub without the need for locking screws and with no backlash.

How many different saddle keys are there?

Saddle keys are of two types, flat and hollow saddle. The tangent keys are fitted in pair at right angles. Sometimes, keys are made integral with the shaft which fits in the keyways broached in the hub. A flat saddle key is a taper key which fits in a keyway in the hub and is flat on the shaft.

What do the F keys do on Mac?

What the F Keys Do on Mac Keyboards

• F1 – Decrease display brightness.
• F2 – Increase display brightness.
• F3 – Open Mission Control.
• F4 – Open Launchpad.
• F5 – Decrease keyboard brightness (On compatible notebooks only)
• F6 – Increase keyboard brightness (On compatible notebooks only)
• F7 – Skip back (Audio)

What does F12 mean on keyboard?

F12. They F12 key has a wide range of functions on Microsoft Word. On its own, the ‘Save As’ window will open, but Ctrl + F12 will open a document from File Explorer. Shift + F12 acts in the same way as Ctrl + S to save the document, while Ctrl + Shift + F12 will print a document with the default settings.

What are the 12 function keys?

Use of Keyboard Function keys (F1 – F12)

• F1: – Almost every program uses this key to open its Help and Support window.
• F2: – Yes, I know, almost everyone has used this to rename files or folders or icons quickly.
• F3: – Press F3 to open search window to find files and folders.
• F4:
• F5:
• F6:
• F8:
• F10:

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.