114 Machine Drawing
dharm
d:\N-Design\Des6-1.pm5 Sixth Print
6.4 What is the purpose of providing a head at the end of a taper sunk key?
6.5 Give the proportions of a gib head, in terms of shaft diameter.
6.6 Where and why the woodruff key is used?
6.7 What is a feather key and what are its uses?
6.8 What is a cotter and when is it used? What is the purpose of using a gib along with a cotter in a
cotter joint?
6.9 What is a knuckle joint and where is it used? What is the difference between the eye end and fork
end of a knuckle joint?
6.10 Why clearances are provided in cotter joints? Differentiate between cotter joint and pin joint?DRAWING EXERCISES
6.1 Sketch the various methods of fitting a feather key in position.
6.2 Sketch the following types of keys in two views, as fitted in position between a shaft and the
mounting. Choose the shaft diameter as 30 mm and the hub diameter of the mounting as 60 mm:
(a) hollow saddle key, (b) flat saddle key,
(c) taper sunk key, (d) single headed feather key,
(e) splines and (f) woodruff key.
6.3 Draw the sectional view from the front, and view from the side of a cotter joint with sleeve used
to connect two rods of 50 mm diameter each.
6.4 Draw the half sectional view from the front, with top half in section and the view from the side of
a cotter joint with socket and spigot ends, to connect two rods of 50 mm diameter each.
6.5 Two square rods of side 50 mm each, are connected by a cotter joint with a gib. Sketch the
following views of the assembly :
(a) half sectional view from the front and (b) view from the side.