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

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

• 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.

• These can be either electric, battery or hand operated
• There is a limit to the size drill bit that can be used

• 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

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.

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