Topic cluster: CNC Turning
CNC turning and CNC milling are both common machining processes, but they fit different part geometries. Understanding the difference helps buyers send clearer RFQs and avoid unnecessary cost.
Buyer problem
A part with both round and flat features may require turning, milling, or both. If the RFQ does not explain critical features, suppliers may make different process assumptions and return very different prices.
Engineering explanation
CNC turning is best for round parts made by rotating the workpiece. CNC milling is best for flat surfaces, pockets, slots, holes, and multi-face features where the cutting tool moves around a fixed workpiece.
Key factors for quotation
- Round shaft, sleeve, or connector geometry usually points to turning
- Housing, bracket, plate, or pocket geometry usually points to milling
- Cross holes, flats, keyways, and slots may require secondary milling
- Tolerance and inspection needs can change the process plan
Common mistakes
- Assuming one process can make every feature efficiently
- Not providing a 3D model for combined geometry
- Ignoring fixturing access for milled features
- Not marking which features are critical for assembly
What buyers should prepare before RFQ
For drawing-based CNC machining, the most useful RFQ package includes a 2D drawing for tolerances and notes, a 3D model for geometry review, material grade, quantity, surface finish, and the application or assembly function of the part. If the part connects with another component, include thread standard, mating dimensions, bearing seat information, or sample photos when available.
Buyers do not need to solve every manufacturing detail before sending an RFQ. The important point is to make the engineering intent clear: which features must fit, which surfaces are cosmetic, which dimensions are critical, and whether the order is for prototype testing, small batch production, or repeat OEM supply.
How we support RFQ review
We review the drawing and select CNC turning, CNC milling, or combined machining based on geometry, tolerance, quantity, and material.
After receiving a complete RFQ, we review the drawing for manufacturability, compare the process route with the required tolerance, and check whether inspection needs are practical for the requested quantity. This helps reduce unclear quotation assumptions and gives buyers a more useful basis for comparing suppliers.
Related service pages
Upload Drawing / Get Quote
Upload STEP, STP, PDF, DXF, DWG, IGES, ZIP files, or sample photos. Include material, quantity, tolerance, surface finish, and target delivery requirements for review.