Topic cluster: Case Study
Bushings and spacers are common CNC turned parts used in mechanical assemblies. Their quotation depends on material, inner diameter, outer diameter, length, tolerance, and edge finish.
Buyer problem
The buyer needs parts that control spacing, support rotation, or align components in an assembly. A small dimensional error can affect fit, movement, or preload.
Engineering explanation
Bushings and spacers are usually produced by CNC turning with drilling, boring, facing, chamfering, and deburring. The key review point is which feature controls the assembly: ID, OD, length, or face parallelism.
Key factors for quotation
- Product: custom bushing or spacer
- Materials: brass, stainless steel, carbon steel, aluminum, or plastic after review
- Process: CNC turning, boring, facing, chamfering
- Tolerance: ID, OD, and length based on drawing
- Inspection: dimensional check and burr review
Common mistakes
- Not identifying the critical fit dimension
- Ignoring burrs on inner diameter
- Using material without checking wear or corrosion needs
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 RFQs, send drawing, material, quantity, ID / OD / length tolerance, and assembly application 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.