Topic cluster: Buyer RFQ Guide
A complete CNC machining RFQ helps the supplier review cost, process, material, tolerance, inspection, and lead time faster. Missing information often causes quotation delays or inaccurate pricing.
Buyer problem
Buyers sometimes send only a short message such as “please quote this part” without drawings, quantity, material, or tolerance. For custom CNC parts, that is usually not enough for a reliable price.
Engineering explanation
CNC machining cost depends on tool access, setup time, machining time, material removal, tolerance, finishing, inspection, and batch quantity. A 2D drawing shows tolerances and notes; a 3D model helps understand geometry and machining access.
Key factors for quotation
- 2D drawing in PDF or DXF / DWG format
- 3D model such as STEP, STP, IGES, or Parasolid
- Material grade, surface finish, and heat treatment if required
- Quantity for prototype and batch production
- Critical dimensions, threads, fit, and inspection report needs
Common mistakes
- Sending only a screenshot of a part with no dimensions
- Not marking which dimensions are critical
- Forgetting thread standard or mating part information
- Asking for tight tolerance on every dimension when only a few features matter
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
Our RFQ page accepts STEP, STP, PDF, DXF, DWG, IGES, ZIP files, and sample photos. Complete RFQs are usually reviewed within 24 hours.
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.