Eduqas GCSE Design and Technology · C600
Component 1
Revise: Shaping and Machining Metal ComponentsA pilot hole is a small guide hole used before a subsequent operation, such as inserting a screw. Its diameter must suit that operation; it is not automatically a clearance hole or a tapping hole.
- Revise: Cutting, Drilling and Machining Plastics
A hole drilled to a suitable diameter before a tap cuts an internal screw thread into it.