Micro Hole Drilling

Sanluo Precision is a leading manufacturer and supplier of micro hole drilling in China, with 18 years of technical accumulation in the field of micro CNC machining, providing customers with high-precision micro CNC machining services. We offer professional customized micro CNC machining services for precision molds, electronic devices, medical equipment, aerospace parts and other industries, supporting the customization of complex and difficult parts. We realize precision drilling of micron-level small holes, deep holes, inclined holes and cross holes, fully meeting the stringent requirements of high-end manufacturing for micro hole drilling.

Send Inquiry

Product Description

Micro CNC Machining Technology

Our micro hole drilling uses micro drill bits to drill holes at high speed. The drill bit diameter is φ0.01-2mm, and twist drills, straight-fluted drills, and gun drills are all available, made of cemented carbide or high-speed steel. Drilling accuracy: hole diameter ±0.005-0.02mm, hole position ±0.01mm, perpendicularity 0.01mm, roundness 0.005mm. The maximum depth-diameter ratio for deep hole drilling is 20:1, using gun drills with internal cooling for chip removal. The rotational speed is 5000-50000rpm, and the coolant pressure is 0.5-2MPa.

Station Accuracy

Dimensional accuracy	OD	ID	T（C）	DP	SW
unit:±/mm	0.001	0.001	0.001	0.001	0.001
Geometric accuracy	Roundness	Coaxiality	Straightness	Cylindricity	Symmetry
unit:±/mm	0.001	0.002	0.001	0.002	0.002
Production capacity	1~999999 pcs	1~999999 pcs	1~999999 pcs	1~999999 pcs	1~999999 pcs
Production cycle	3-20 days	3-20 days	3-20 days	3-20 days	3-20 days

Drilling Machining Capacity

Sanluo Precision's processing plant has comprehensive micro hole drilling capacity: standard micro holes (diameter φ0.1-2mm, depth ≤30mm, depth-diameter ratio ≤15:1, hole position accuracy ±0.01mm), deep micro holes (depth ≤60mm, depth-diameter ratio ≤20:1, straightness 0.05mm/100mm), blind holes (depth accuracy ±0.05mm, hole bottom roughness Ra≤1.6μm), through holes (burr-free, hole wall Ra0.8-1.6μm), inclined holes (inclination angle 15°-75°), cross holes (intersection point accuracy ±0.02mm), and array holes (hole pitch accuracy ±0.01mm, consistency <0.005mm).

Special Process Technology Optimization

As a professional manufacturer of micro hole drilling, we have refined and optimized the process: drill bit selection (straight-fluted drills for hole diameter φ<0.5mm to prevent breakage, twist drills for φ0.5-2mm to improve efficiency, gun drills for deep holes with strong cooling), pilot hole process (improving accuracy from small to large), layered drilling (0.5-2 times the diameter each time), tool retraction for chip removal (retracting the tool every 1-3mm of drilling to prevent blockage), drill tip inspection (timely replacement of worn drill tips), and chamfering after drilling (C0.1-0.3mm to remove burrs).

Wide Application Fields

Micro hole drilling is applied in precision molds (ejector pin holes φ0.5-3mm, depth 150mm, depth-diameter ratio ≥30:1; cooling holes with inclined holes 30°-45° penetrating the inside), electronic devices (PCB holes φ0.2-1mm, hole position ±0.05mm; ceramic substrate hole orifices without chipping), medical equipment (catheter side holes φ0.3-1mm for drug delivery; bone nail guide holes φ1.5-3mm for guiding implantation), and aerospace parts (blade cooling holes φ0.5-1.5mm, inclination angle 20°-40°; fuel nozzles φ0.2-0.8mm with multi-hole atomization). Sanluo Precision has directly or indirectly provided customized micro CNC machining services for enterprises such as BYD, Foxconn, Johnson & Johnson, Medtronic, etc., with an annual drilling volume of more than 4 million holes, featuring stable and reliable quality.

Technical Parameters

Parameter Category	Parameter Details
Equipment model	Kastie-WK
Core Positioning	High-precision micro hole drilling
Number of Axes	Information missing
Key Accuracy	Repeat positioning accuracy ±0.5μm
Drive System	X-axis adopts linear motor drive with fast response; Y/Z axes adopt high-precision ball screws with full closed-loop control of magnetic grid encoders
Spindle System	Adopts German SycoTec high-speed electric spindle, featuring high speed, high precision and large torque
Machining Capacity	Supports hole diameter range of 0.015 - 10 mm
Bed Structure	Marble base with good stability
Visual Positioning	Equipped with a 5-megapixel camera, positioning accuracy up to 1μm
Core Advantages	Compact structure, stable operation; multi-station work, high machining efficiency
Typical Applications	precision micro hole drilling parts, etc

Parameter Category	Parameter Details
Equipment model	(4-axis High-speed CNC Drilling Machine)
Core Positioning	Multi-angle, high-efficiency micro hole drilling
Number of Axes	4-axis (including 360° automatic rotating A-axis)
Spindle System	High-speed spindle with adjustable speed of 3000 - 60,000 rpm
Key Accuracy	Machine tool repeat positioning accuracy 0.001 - 0.002 mm; spindle runout accuracy μ-level (0.0001-0.0002 mm)
Cooling System	Equipped with internal cooling circulation system to ensure the spindle does not overheat and protect micro drill bits
CNC System	Supports importing CAD drawings to automatically generate programs without programming
Core Advantages	Able to realize 360° automatic rotating multi-angle drilling; high automation and easy operation
Typical Applications	micro hole drilling of round tube or polyhedral workpieces made of stainless steel, aluminum, iron, copper, plastic and other materials

Parameter Category	Parameter Details
Equipment model	HX-1680 Series Machining Center
Core Positioning	Targeting high-precision micro hole machining requirements of medical equipment, such as surgical instrument joint parts
Spindle System	High-precision electric spindle with radial runout ≤0.001mm, equipped with exclusive tools for micro hole drilling
Control Technology	Combined with closed-loop control technology, it can real-time monitor dimensional changes during drilling and automatically compensate for tool wear
Machining Capacity	Able to machine high-precision holes with a diameter of φ3mm, hole diameter tolerance requirement of H5 grade, and hole coaxiality error ≤0.005mm
Automation Adaptation	Supports customized fixtures to adapt to machining requirements of workpieces with different structures
Typical Applications	precision micro hole drilling parts, etc

Parameter Category	Parameter Details
Equipment model	CNC-430AC
Core Positioning	Fully automatic 4-axis CNC, suitable for micro hole machining of semiconductor, ceramic and other materials
Number of Axes and Stroke	4-axis CNC; X/Y axis stroke 400x300mm; Z-axis stroke 250mm
Key Accuracy	X/Y axis positioning accuracy 0.005mm; repeat positioning accuracy ±0.0005mm
Control and Drive	Taiwan Advantech CNC system; X/Y axes adopt AC servo linear motors
Machining Effect	Surface roughness Ra 0.6μm
Characteristic Configuration	Uses deionized water as working fluid; equipped with non-electrolytic power supply to prevent workpiece oxidation
Typical Applications	precision micro hole drilling parts, etc