Custom precision machining is compared with standard machining.
Standard parts refer to the national standard of different countries. For example, Japan MISUMI/O standard, Germany DIN/ISO standard, German HASCO/O standard, German FIBRO standard, US DME/O standard, and Spanish CUMSA/O standard, etc.
Custom parts refer to the specially shaped parts that need to be made according to the drawings. They are also called non-standard parts.
With the custom-made parts, we need custom precision machining. Usually, custom parts are not in bulk quantity, only a few pieces or even a single piece.
So custom parts can not be made by opening the mold and then bulk production. But most of the custom parts may be parts that are used for the assembly of a set of mold, tool, or die. Or some jigs and fixtures used for locating functions as auxiliary devices in the metal stamping dies or plastic molds.
Custom precision machining needs more techniques in the machining process. As every drawing is different, and usually custom parts are more complicated than the standard parts.
To make the standard parts, we may only need the CNC milling machines and CNC turning machines. But to make the custom parts, we may need more CNC machining machines. For example, Wire-cut EDM, Sinker EDM, Surface grinding machines, Profile grinding machines, and Centerless grinding machines.
Usually, standard parts have comparatively low tolerance requirements, but for custom precision machining, custom parts often need high tolerance requirements. Most of the custom parts need a tolerance of +/-0.01mm, and some ultra-precision parts need +/-000.2mm, or even +/-0.001mm(1μm).
Custom precision machining also needs long-term experience accumulation. As custom parts usually are complex shapes. Some are round and rectangular shapes in combination. We need sophisticated techniques and experiences to make them. And there are also some past-treatment, like heat treatment, or surface treatments like coatings. They also need high-precision coating size requirements or heat treatment temperature requirements. These all need techniques and experiences.
All in one, To do custom precision machining is serious work, It needs a rigorous manner to do the work. And also need advanced machining equipment and sophisticated operators and machinists. If you are interested, welcome to discuss us more about the topic.