Micro End Milling

End Milling Technology

Sanluo Precision's micro end milling uses micro end mills to process planes and cavities. The types of cutters include flat end mills, ball end mills and corner radius end mills with a diameter of φ0.1-2mm. Single-side cutting for end milling, with a surface flatness of 0.002mm and a surface roughness of Ra0.1-0.6μm. The minimum groove width for narrow groove milling is 0.015mm, the depth-width ratio for deep groove machining is ≥8:1, with a flat groove bottom and a side wall verticality of >88°. Spiral interpolation milling is adopted for micro hole milling, with a hole diameter of 0.05-5mm, a roundness of 0.001mm and a hole wall roughness of Ra0.2μm, which is better than drilling. Multi-layer step milling for step machining, with a single-layer height of 0.1-1mm, a step surface parallelism of 0.01mm and a squareness of 90°±5′.

Station Accuracy

Precision Engraving of Narrow Grooves and Micro Holes

Sanluo Precision's processing plant specializes in micro end milling, including narrow grooves and micro holes: narrow groove machining with a groove width of 0.05-2mm, a groove depth of ≤20mm and a depth-width ratio of 8:1, adopting φ0.04-0.5mm end mills for layered milling with a single-layer thickness of 0.2-0.5mm, a groove bottom flatness of 0.001mm, a side wall parallelism of 0.001mm and a right angle R<0.01mm; micro hole milling with a hole diameter of φ0.02-3mm and a depth of ≤30mm for deep hole machining, adopting spiral plunge milling with circular feed, a hole diameter accuracy of ±0.005mm, a roundness of 0.003mm, burr-free hole orifice and smooth hole wall with Ra0.4μm, which is better than drilled holes; special-shaped holes (square holes, waist-shaped holes, special-shaped contour holes) with flexible programming and high precision.

Obvious Machining Advantages

As a professional manufacturer of micro end milling, we are equipped with a high-speed electric spindle with a rotational speed of 60000rpm and a cutter clamping runout of <0.002mm, ensuring stable machining. The application fields are extensive: precision instruments (quartz crystal oscillator narrow groove width 0.3mm; sensor diaphragm step parallelism 0.005mm), electronic packaging (ceramic substrate micro groove wiring; IC carrier board micro hole diameter φ0.8mm), optical devices (optical fiber ferrule end face flatness 0.003mm; lens holder step matching accuracy 0.005mm), medical implants (bone nail guide groove; implant thread bottom hole with accurate taper). Micro milling has obvious advantages: high precision with a profile tolerance of ±0.002mm and a roughness of Ra0.1μm, high flexibility with one-time programming for any shape, stress-free machining with thin-walled part deformation <0.01mm, high-speed milling with a smooth surface, and a wide range of machinable materials (steel, aluminum, copper, titanium, ceramics below HRC60). We have provided customized micro CNC machining services for enterprises such as Apple, Huawei, Siemens, Medtronic, etc., with an annual output of 300,000 miniature parts.

Technical Parameters of Micro End Milling Equipment