Modern advanced precision machining refers almost exclusively to a class of CNC machining that exceeds standard CNC operations to produce complex parts with very tight tolerances. Standard CNC machining of parts produces tolerances—acceptable deviations from the CAD model’s dimensions—of about (0.12 to 0.2 mm). Precision machining, on the other hand, can achieve much tighter tolerances, as close as 0.0001 inches (0.0025 mm).
Precision machining’s higher standards stem from the demands of high-performance industries such as aerospace, automotive, medical and surgical devices, robotics, electricity generation, electronics, and more. These industries often manufacture intricate parts and assemblies that need to fit and function together with the greatest level of reliability.
While precision machining can be done on standard 3-axis CNC machines, it frequently makes use of multi-axis machines, which are capable of greater accuracy and detail. Multi-axis CNC machines typically have four, five, or more controlled axes and are ideally suited for precision machining. They can perform simultaneous processes with less human setup and repositioning, making precision machining operations reliably repeatable at scale.
Precision CNC machined parts usually don’t require additional polishing or finishing, which eliminates costly and inconsistent manual processes. They produce an aesthetic quality free of blemishes and imperfections, which makes them valuable for visible product parts where impeccable appearance matters. Suppliers may be attracted to making precision machined parts because their high quality could fetch a higher price.
