Precision Laser Drilling Machine for Micro Holes in Metal Nozzles and Dies

How Small a Hole Can Laser Drill?

Mechanical drilling hits a wall around 0.2mm diameter: drill bits below that size break regularly, wear out within hours, and require peck cycles that slow production. A precision laser drilling machine removes the drill bit entirely. It uses a pulsed Nd:YAG or fiber laser to melt and vaporize material, producing holes from 0.02mm to 1mm diameter in metals, ceramics, and hard alloys. Hole-to-hole consistency does not drift with tool wear, and complex hole patterns are programmed as a CAD file rather than set up on a CNC lathe.

This is the standard process for fuel injector nozzles, spinneret holes in synthetic fiber manufacturing, diesel engine cooling holes, and medical implant openings. The machine includes a 5-axis positioner for drilling at angles, a CCD camera for hole alignment, and a pressurized air assist that clears molten material out of the hole.

1. Fuel injector nozzles: 0.1-0.3mm holes in hardened steel injector tips.
2. Spinneret plates: arrays of 0.05-0.2mm holes for synthetic fiber extrusion.
3. Diesel engine cooling holes: 0.3-1mm holes in cylinder heads and piston crowns.
4. Medical implants: micro holes in titanium orthopedic components for bone ingrowth.
5. EDM and injection molds: vent holes and gate openings in hard die steel.

• Laser type: Pulsed Nd:YAG or fiber laser
• Average power: 200W, 300W, 500W options
• Peak power: Up to 30kW
• Wavelength: 1064nm
• Minimum hole diameter: 0.02mm
• Maximum hole depth: 5-10 times hole diameter
• Hole position accuracy: +/-5 microns
• Taper control: Drills straight or tapered holes by adjusting pulse focus
• Worktable: 300mm x 300mm X-Y stage, rotary axis optional
• CCD camera: 10x optical, for hole alignment
• Gas assist: Pressurized air or nitrogen, 0.2-0.6 MPa
• Power supply: 380V three phase
• Machine weight: Approximately 1,500kg
• Enclosure: Fully enclosed with interlocked safety door

1. Percussion drilling: single pulse burst per hole, fastest for thin sheets.
2. Trepanning: laser cuts a circular path for larger holes with cleaner walls.
3. Helical drilling: laser spirals to depth, produces straight-wall deep holes.
4. Gentle drilling: low-power pulses for fragile parts and ceramics.

This machine is for:

1. Fuel system manufacturers drilling injector nozzles for diesel and gasoline engines.
2. Textile machinery makers producing spinneret plates for polyester and nylon fiber.
3. Aerospace component shops drilling turbine blade cooling holes.
4. Medical device shops drilling holes in titanium implants and surgical tools.
5. Mold and die shops drilling vent holes and conformal cooling channels.

EDM drilling handles very deep holes (depth-to-diameter over 50:1) but uses a brass electrode that wears and needs replacement. Laser drilling has no consumable, drills faster, and handles harder materials. EDM remains the choice for holes deeper than 10mm with small diameters; laser covers most production micro-hole work below that depth.