Topic cluster: Case Study
This case study shows a typical 304 stainless steel shaft RFQ where diameter control, straightness, surface finish, and inspection points were reviewed before quotation.
Buyer problem
The buyer needed a custom shaft for industrial machinery. The main concerns were stable diameter control, clean chamfers, and repeatable dimensions for batch production.
Engineering explanation
The part was reviewed as a CNC turning project. Critical diameters, total length, end chamfers, material grade, and surface finish notes were checked before quotation.
Key factors for quotation
- Product: stainless steel shaft
- Material: 304 stainless steel
- Process: CNC turning, facing, chamfering, deburring
- Tolerance: critical diameters reviewed according to drawing
- Inspection: diameter and length check before packing
Common mistakes
- Quoting shaft parts without checking length-to-diameter ratio
- Ignoring bearing seat or mating diameter notes
- Not confirming surface finish before production
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
For similar shaft projects, send 2D drawing, STEP file, material grade, quantity, critical diameters, and any straightness or runout notes.
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.
Need a Quote for Custom CNC Parts?
Send your drawing, material, quantity, tolerance, and application requirements. We usually reply within 24 hours after reviewing your files.