Countersinking is a method of machining in which an cavity is made in solid material along the axis of the hole to be drilled. This process is carried out using a rotating tool called a centre drill. During drilling, the primary (rotary) motion is made by the tool or the workpiece (lathe countersinking). The feed motion is performed in a direction parallel to the axis of the centre drill by the tool or workpiece.
Countersinking
Type of technology
Development phase
Level of innovation
Scale of production
batch, unit
Technology readiness level TRL
Description of the technology
Purpose of use
hole designing (creating a machining base for the next hole machining operation)
Use in industry
all industries
Alternative technologies
- milling using CNC machines
- drilling using CNC machines
Visualisation of action
Advantages
- a relatively quick technique for designing a hole
Disadvantages
- use of machining fluids that are not inert to people and the environment
- significant tooling and fixture costs
- outdated hole designing technique (can be eliminated by machining on CNC machines)
Workpiece material types
- all material groups
- ferrous metals
- non-ferrous metals
- non-ferrous metals alloys
- hard materials
- hardened materials
Examples of products
- mounting bolts
- nuts
- bearing bushings
- spacer bushings
- furniture drills
- hull panels
- medical micro-needles
Implementation of the technology
Required resources
- drilling machine
- milling machine or lathe
- cutting tools
- tooling
- machining fluids (optional)
Required competences
- training in machining
Environmental aspects
Water consumption
Energy consumption
Waste generated
Expert evaluation
Development centers
Legal conditions
- none