FAQ
Answers to common CNC machining RFQ, material, tolerance, inspection and shipping questions.
- Which files and drawings help engineering review move faster.
- How to describe materials, finishes, tolerances and quantity requirements.
- When to ask for DFM feedback before prototype or production work.
What information do I need to request a CNC machining quote?
Please send your 3D CAD file, 2D drawing if available, material, quantity, surface finish, tolerance requirements, and any special inspection or packaging needs. If the part is used in an assembly, sharing the application context also helps us review manufacturability faster.
What file formats do you accept for CNC machining projects?
We commonly accept STEP, STP, X_T, IGS, SLDPRT, DWG, DXF and PDF files. For accurate quoting, a STEP or STP file is preferred, together with a PDF drawing that defines tolerances, threads, surface finish and critical dimensions.
Can you manufacture parts without a 2D drawing?
Yes, we can quote and machine many parts from a 3D model only. However, if the part has tight tolerances, threads, fits, GD&T, surface roughness or inspection requirements, a 2D drawing is strongly recommended to avoid misunderstanding.
What materials can OEMach machine?
OEMach machines aluminum, stainless steel, carbon steel, brass, copper, titanium and engineering plastics such as POM, PEEK, nylon, PTFE and ABS. If you are not sure which material is suitable, we can help review the application and suggest practical options.
What tolerances can you hold for custom CNC parts?
Standard tolerances depend on material, geometry and part size. For precision features, tighter tolerances can be reviewed based on the drawing and inspection method. We recommend marking only critical dimensions with tight tolerances to control cost and lead time.
Do you support CNC prototypes and low-volume production?
Yes. We support CNC prototypes, engineering samples, small batches and low-volume production. We can also help review whether the design is suitable for machining, whether tolerances are practical, and how to reduce rework before larger production.
How fast can you deliver CNC machined parts?
Lead time depends on material availability, part complexity, quantity, finish and inspection requirements. Simple prototype parts can often be produced faster, while complex precision parts or special finishes may require more time. Please send your RFQ details for an accurate schedule.
What surface finishes are available for CNC machined parts?
Available finishes include as-machined, bead blasting, anodizing, hard anodizing, passivation, polishing, black oxide, plating and powder coating. The best finish depends on appearance, corrosion resistance, wear resistance and dimensional requirements.
How do you inspect CNC machined parts before shipment?
We inspect parts according to the drawing and customer requirements. Common inspection methods include calipers, micrometers, height gauges, thread gauges, surface roughness checks and CMM inspection for critical dimensions. Inspection reports can be provided when required.
Do you ship CNC machined parts internationally?
Yes. OEMach supports international shipping for CNC machined parts. We can pack parts according to their surface, precision and protection requirements, and ship by express, air freight or other agreed methods depending on urgency and order size.