What Is 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 sunk key and types of sunk key?

Sunk key. Types of sunk keys: rectangular, square, parallel sunk, gib-head, feather, and Woodruff.

What is the difference between a sunk key and a 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.

What is sunk key in mechanical engineering?

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.

Which of following is a type of sunk key?

Explanation: Woodruff key is a sunk key and doesn’t permit axial moment.

What is the requirement of sunk key?

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. The sunk keys are of the following types: Rectangular sunk key: It is the simplest type of key and has a rectangular cross-section. A taper of about 1 in 100 is provided on its top side.

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.

Where is sunk key used?

(e) Splines. (a) Sunk keys: A sunk key is a key in which half the thickness of the key fits into the keyway on the shaft and the remaining half in the keyway on the hub. Therefore, keyways are required both on the shaft as well as the hub of the mating element.

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.

How much torque can a keyway handle?

The limiting pressure point of a keyed shaft is the keyway side of the male shaft, provided the proper key material is selected. Thus, 270 Nm is the maximum torque that can be transmitted before the 19 mm diameter keyed shaft plastically deforms.

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 feathered keyway?

: 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.

What is rectangular sunk key?

Rectangular Sunk Key Rectangular sunk key is usual proportions of Width of key and thickness of key and diameter of the shaft or diameter of hole in the hub.This key is mostly use in machine tool and automobile assembly. 6. Gib-head Key This is a rectangular sunk key by a head at one end recognized as gib head.

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 are the types of shaft?

Shafts are mainly classified into two types:

• Transmission shafts are used to transmit power between the source and the machine absorbing power.
• Machine shafts are an integral part of the machine itself.
• Axle shafts are used in vehicles.

What is hollow saddle key?

b) Hollow saddle key A hollow saddle key is a taper key which fits in a keyway in the hub and the bottom of the key is shaped to fit the curved surface of the shaft. Since hollow saddle keys hold on by friction, therefore these are suitable for light loads.

Why is taper given to sunk key?

A taper key joint prevents relative rotational as well as axial movement between the two pieces. The types of taper keys are; (1) Sunk taper key, which is a standard form of key and may be either of square or rectangular cross-section.

Which of the following forces acts on the sunk key?

When a key is used in transmitting torque from a shaft to a rotor or hub, the following two types of forces act on the key : 1. Forces (F1) due to fit of the key in its key way, as in a tight fitting straight key or in a tapered key driven in place.

What are the features of sunk keys?

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

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 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.