KEYS & COTTERS

INTRODUCTION

A Key is a wedge shaped piece of steel. 
The key is used to prevent relative motion between. shaft and the mountings such as pulleys, gears etc. 

To accommodate key, a groove called key way is cut. 
The half of the key way is cut in the shaft as well as in the hub.
The sizes and shapes of the keys have been standardized and proportioned to the diameter of the shaft. 
Although there are a large number of keys used in the engineering field but the following types are important form the subject point of view;


1: Sunk Key:-

(a) Rectangular Key:-

(b) Square key:-

(c) Parallel sunk key:-

(d) Jib head key:-

(e) Feather key:-

(f) Wood ruffs key:-

 2: Saddle key:-

(a) Flat saddle key:-

(b) Hollow saddle key

3: Tangent key:-

(a) Left tangent key:-

(b) Right tangent key:-

4: Round key:-

(a) Round pin:-

(b) Taper pin:-

5: Splines:-