CNC Machining Services in China by Ecoreprap

The two primary CNC machining processes are CNC turning and CNC milling. Other machining processes include drilling, gear hobbing and electrical discharge machining,grinding among others.

Parts machined with metal will follow ISO 2768-m (medium) or ISO 2768-f (fine). Parts machined with plastics will follow 2768-m (medium). Geometric tolerances down to ± 0.001mm are possible but must be clearly indicated in technical drawings. We can achieve tighter tolerances on shafts with up to H7 fits with manual quoting and on occasion tighter.

We offer CNC milling (3-axis, 3+2-axis and 5-axis) and turning. Milled parts can be machined up to 2000 x 1500 x 300 mm for 3, 3+2 axis CNC milling. For 5-axis milling, the maximum part size is 650 x 650 x 300 mm. The maximum diameter for CNC turning is 431mm, length 990 mm. Minimum part dimensions recommended are around 2 x 2 x 2mm.The minimum for feature dimensions is 0.5 mm.

Deburing and edge breaking are standard procedures for all CNC machined parts. lf there are any critical edges that should be left sharp, they must be clearly indicated in technical drawings. Surfaces will be free of defects such as scratches, dents, stains, blemishes, hanging marks, minor defects. Surfaces indicated ascritical (primary (a) side, as indicated on the technical drawing) will be free of mill steps and other marks. For the secondary (b) side, minor hanging marks and up to 2 minor defects are acceptable. A number of post-processing and finishing methods can be applied to improve the surface roug hness, visual properties andwear resistance of machined parts.

We offer UNF, UNC, and metric threads for machining along with coil and key inserts. These are available on both milled or turned CNC parts.

ECOREPRAP caters to both one-off prototype and large-scale production runs. Thus, there is typically no strict MOQ. Whether you need a single part or thousands, ECOREPRAP aims to provide a solution.

Lead times can vary based on the complexity of the design, the chosen material, and the current workload. However, one of the advantages of CNC machining is its speed, especially for simpler parts. Once the setup is complete, machining times can be relatively quick. Parts machined as fast as 1 day! But for an accurate estimate, it’s best to request for quotes directly.

The main costs associated with CNC machining can be grouped into machining time, start-up costs,material costs, and feature costs. To reduce costs you need to understand the impact of these factors on cost. The best way to reduce machining time is to design features that can be machined quickly, for example by choosing the correct radii for internal corners, reducing cavity depth, increasing wall thicknesses, limiting thread length and designing holes with standard sizes. Material costs can be reduced by considering the size of the blank required, and the cost and machinability of the bulk material (softer alloys are faster to machine). Start-up costs can be reduced by reducing the number part rotations or repositioning required to finish thepart, for example by separating geometries into multiple parts that can be assembled later. Feature costs can be reduced by only usina tolerances when strictly necessary, removing all text & lettering and avoiding multiple surface finishes.

Product designers and engineers choose CNC machining to rapidly produce prototypes and production parts. The manufacturing technology offers a high level of precision, engineering-grade materials, quick-turn lead times.

Industries that use CNC machining include aerospace, automotive parts manufacturing, medical machine manufacturing, transportation, defense, and marine industries, along with oil and gas industries and electronics. CNC machining has allowed these industries to become more efficient at mass-producing custom CNC parts.