What is a Kennedy key?

[′ken·ə·dē ‚kē] (design engineering) A square taper key fitted into a keyway of square section and driven from opposite ends of the hub.

What is tangent keys?

The tangent keys or sometimes called Tangential keys are fitted as a pair at right angles as shown in figure 15, where each key withstands torsion in one direction only. These are used in large heavy-duty shafts. Figure 15. Tangential Keys and Tangential Keyways ( source: fasten.it)

What is Barth key?

Barth key. Barth key is modified from the square key. Barth key has a bevel shaped smooth edges at the upper part. This bevel shaped smooth edges help the key to fit tightly. Like a square key, the Barth key is also used in many applications.

Which type of key consists of two square keys is called?

Kennedy key: These keys have two square tapered keys which are placed 90° apart. Such keys are used for heavy duty applications.

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 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.

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.

What is the disadvantage of keyed joint?

Too much securely fixed keyed joint might become difficult to dismantle. Causes shaft imbalance. They introduce stress points due to the notch effect and reduce shaft strength. Possible axial displacement of hub unless locked by an extra component such as circlip or set screw.

What is feather key?

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 the purpose of a Woodruff key?

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.

Are all Woodruff keys the same?

The two most common woodruff keys are full radius and flat bottom. Both function the same, but may be appropriate for different applications. It is important to note that both radius and flat bottom woodruff keys are standard and either is shipped at the manufacturer’s discretion.

What are tangent keys used for?

Tangent keys are used in heavy-duty equipment. Tangent keys are actually a pair. These pair of keys are placed right angles to each other and tangent to the surface of the shaft as shown in the fig. each key will withstand the torsion in one direction only.

What are the characteristics of circular keys?

It consists of a semicircular key seat on the shaft surface which holds the key. The key is in the shape of a section of a circle. This type of key tends to have a lesser shear strength than compared to that of a rectangular or square key.

What are the different types of keys in keyboard?

6.2 TYPES OF KEYS. The following types of keys are important from the subject point of view : (a) Shunk keys, (b) Saddle keys, (c) Tangent keys, (d) Round keys, and (e) Splines. We shall now discuss the above types of keys, in detail, in the following sections.

What is the difference between round and shaft keys?

Round keys are circular in section and fit into the holes. The round keys will be placed half portion hole in the shaft and the other half portion hole in the hub as shown in the fig. These type of shaft keys are usually prepared for the low power drives.