Topic cluster: Case Study
This case study shows a brass mechanical sleeve set where inner diameter, outer diameter, length, edge finish, and batch consistency were reviewed before shipment.
Buyer problem
The buyer needed brass sleeves for mechanical assembly. The important features were inner diameter, outer diameter, length consistency, and clean edges after machining.
Engineering explanation
Brass is suitable for many sleeve and bushing applications because it machines well and can provide stable dimensions. The process used CNC turning, ID / OD machining, facing, chamfering, and inspection.
Key factors for quotation
- Product: brass sleeve set
- Material: brass
- Process: CNC turning, ID / OD machining, facing, chamfering
- Tolerance: checked on ID, OD, and length
- Inspection: dimensional check before packing
Common mistakes
- Not identifying whether ID or OD is the critical fit
- Ignoring burrs on inner edges
- Sending only quantity without assembly use information
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 brass sleeve RFQs, send drawing, quantity, material grade, critical fit information, and any surface or deburring requirements.
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.