Drilling should include
- measuring and marking the metal for drilling using a center punch
- selecting the correct bit
- selecting and applying necessary cooling lubricants.
Process/Skill Questions:
- How do you lay out a hole to be drilled?
- What are the different types of drill bit shanks?
- What determines the size of the bit to use when drilling a hole in metal?
- What is the purpose of center-punch marking before drilling?