1. Drilling
There are three types of Drilling machine used in the Engineering room:
Bench Drills
Pillar Drills
Hand drills

2. 1. Bench Drills
Used for drilling holes through woods, plastics and metals.
It is normally bolted to a bench so that it cannot be pushed over

3. 2. Pillar Drills
The Pillar drill is a larger version of the bench drill
This has a long column which stands on the floor
Because of its larger size it is able to drill larger pieces of materials and produce larger holes.

4. 3 Hand drills These can be either electric, battery or hand operated
There is a limit to the size drill bit that can be used

5. 4. Safety on the drilling machine
Follow all teacher instructions carefully.
Always wear safety goggles
Ensure the centre punch mark is under the drill bit
Clamp the materials down or use a machine vice.
Never hold materials by hand while drilling.
Always allow the chippings or swarf to clear the drill by drilling a small amount at a time.
Reduce pressure when the drill bit is breaking through

6. Using the pillar or Bench drill
When Drilling, the piece must be held firmly using the following ways:
a) Machine Vice
b) Clamping directly to the table
c) Vice grips etc.

7. Drill bits Twist drills are made from High Speed Steel
Smaller drill bits have parallel shanks, larger bits have taper shanks