Machine Drawing

90 Machine Drawing

dharm
d:\N-Design\Des5-1.pm5 Seventh Print

5.9.5.2 T-Headed Bolt With Square Neck

In this, a square neck provided below the head, prevents the rotation of the bolt. This type of bolt is

used for fixing vices, work pieces, etc., to the machine table having T-slots (Fig. 5.19).

0.8 D 0.8 D

D 1.8 D

0.8 D 0.9 D

D

Fig. 5.19 T-headed bolt Fig. 5.20 Hook bolt

5.9.5.3 Hook Bolt

This bolt passes through a hole in one part only, while the other part is gripped by the hook

shaped bolt head. It is used where there is no space for making a bolt hole in one of the parts. The

square neck prevents the rotation of the bolt (Fig. 5.20).

5.9.5.4 Eye Bolt

In order to facilitate lifting of heavy machinery, like electric generators, motors, turbines, etc.,

eye bolts are screwed on to their top surfaces. For fitting an eye bolt, a tapped hole is provided,

above the centre of gravity of the machine (Fig. 5.21).

f0.8 D

2D

0.4 D

2D

1.5 D

1.5

D

1.5 D

DD

Fig. 5.21 Eye-bolt