Precision machining tools

🔩 Tool Identification

• These are center drills (also called spotting drills).
• Some tools also appear to be combined drill and countersink tools used to:
  • Start a hole accurately
  • Create a chamfer (angled edge) at the top of the hole

⚙️ Key Features

• Pointed Tips:
  The sharp conical ends are designed to create precise starting points for drilling, preventing larger drills from wandering.
• Stepped Design:
  Many tools have two diameters:
  • A small pilot tip
  • A larger body for countersinking
• Threaded Shanks:
  The black threaded ends indicate they can be mounted into tool holders or machine spindles.
• Flutes (Cutting Edges):
  Visible grooves allow cutting and removal of metal chips during operation.

🧱 Variations in the Image

• Different sizes and angles are shown for various hole sizes and chamfer requirements.
• One larger tool (center-left) looks like a multi-flute countersink, used for wider chamfers or deburring.

🏭 Typical Uses

These tools are widely used in:

• Lathe machines (to create center holes for supporting workpieces)
• CNC machines (for accurate hole positioning)
• Drilling operations (as a first step before using larger drills)

🧠 Purpose

• Ensures high precision and alignment
• Prevents drill bit slipping
• Improves accuracy and surface finish