The Realistic Timeline
A standard custom CNC part takes 2–4 weeks from drawing confirmation to shipment, and actual machining accounts for only about half that window. The rest is queue time, material sourcing, inspection, and back-and-forth on drawing details.
Phase-by-Phase Breakdown
| Phase | Typical Duration | Who Is Waiting |
|---|---|---|
| RFQ sent to quote returned | 1–3 working days | Waiting on supplier engineering review |
| Quote accepted to PO or drawing locked | 1–2 days | Waiting on buyer confirmation |
| Material procurement | 1–5 days | Waiting on stock or mill delivery |
| Programming and fixturing | 1–2 days | Internal shop setup |
| Machining | 2–5 days | Machine queue plus run time |
| Inspection (CMM or visual) | 1–2 days | Quality department |
| Packing and shipment handoff | 1 day | Logistics coordination |
What Slows Orders Down
Most delays come from factors visible before you place the order — identifying them early compresses the schedule significantly.
- Material stock status: common grades (6061-T6, 304 SS) ship same day; exotic alloys or plastics can add 3–7 days
- Tight tolerances below ±0.02 mm require additional setups and slow down inspection
- Surface treatments such as hard anodizing or plating add 2–5 days through outside vendors
- CMM or FAI reports require programming time and may add 1–2 days
- End-of-month order surges: orders placed in the last week of a month may wait 2–3 extra days in queue
How to Compress Lead Time
- Send a complete drawing (all dimensions, tolerances, material, finish) with your initial RFQ
- Specify a stocked material grade instead of a rare alloy when performance allows
- Avoid plating or anodizing on prototype runs unless it is functionally required
- Place PO early in the week and ask whether capacity is available before confirming
How to Get a Real Delivery Date
Ask three specific questions instead of accepting "2 weeks": "Does this start when I send the PO or when material arrives?", "Is the quoted time calendar days or working days?", and "What happens to my date if CMM inspection finds a defect?" A shop that answers all three precisely is giving you a real date.
TruPart Precision is a Dongguan-based ISO 9001 CNC shop that quotes realistic lead times by default. Our glossary explains more sourcing terms that affect your delivery timeline.
Frequently Asked Questions
How fast can a rush order ship?
A truly rushed CNC order (simple geometry, stocked aluminum, as-machined finish, no inspection report) can ship in 3–5 working days, but expect a rush premium of 30–50%.
Is a quoted lead time of 2 weeks reliable?
It can be, but only if the shop confirmed material stock and queue position before quoting. Always ask whether the clock starts at PO or at material arrival.
Should lead times be written into the contract?
Yes, include a target ship date and a penalty clause or escape clause for delays beyond an agreed window, especially on production orders.
Why do prototypes ship faster than production runs?
Prototypes usually skip outside surface treatments and formal FAI; production orders require documented inspection and process locks that add days.