A precision parts quotation rests on six cost items: material, tooling, machine time, finishing, inspection, and overhead with scrap. Tooling is amortized across order quantity, which is why unit price falls with volume. Read the six lines in order and the number stops being a black box.
Most disputes over a precision parts quotation come down to two figures nobody asks for: the amortization base and the material utilization rate. Where those figures come from is mapped in the six precision parts processes and their cost structure.
Material is priced on blank weight, not finished weight. A 120 gram part may start as a 400 gram blank, so finished weight never reconciles.
| Cost item | Basis | Typical share |
|---|---|---|
| Material | Blank weight ÷ utilization | 10% to 30% |
| Tooling | Tooling cost ÷ quantity | over 20% on small lots |
| Machine time | Rate × cycle × operations | 30% to 45% |
| Finishing | Outsourced rate × pieces | 5% to 15% |
| Inspection | Sampling plus FAI report | 3% to 10% |
| Overhead and scrap | Markup on direct cost | 8% to 20% |
Machine time is the largest line, and its share climbs as batch size falls. Small-batch unit price doubles because machine time and tooling divide by too few pieces.
Material cost follows the process, not the alloy grade. MIM and CIM run 95% to 98% utilization, pressed and sintered PM near 95%, CNC at 20% to 60%. Switch process on the same drawing and the material line can triple.
Tooling is where a precision parts quotation inflates most often. A MIM mold runs 500,000 to 1,000,000 shots, yet quotes routinely amortize it over 30,000 parts.
Tolerance is the most sensitive dial on machine time: 0.025 mm adds 30% to 50% to machining cost, and a CMM first article adds USD 150 to 500 per lot. Overhead and scrap cannot be derived from the part itself, and 20% to 30% on direct cost is common. Sampling and document depth follow the Yujiaxin Tech quality control policy.
| Process | Material utilization | Volume threshold |
|---|---|---|
| MIM | 95% to 98% | 10,000 a year |
| Pressed PM | near 95% | 10,000 a year |
| Investment casting | 50% to 70% | mid volume |
| Gear hobbing | 20% to 60% | mid volume |
| CNC | 20% to 60% | 1 to 10 pieces |
| CIM | 95% to 98% | 10,000 a year |
At 95% against 30% to 50%, MIM turns the same blank budget into twice as many parts, while CNC wins on zero tooling. Process choice moves a precision parts quotation further than negotiation.
CT values trip people up. The grade is the total tolerance band, so a drawing tolerance of ± is half of it: in the 0 to 10 mm band, CT4 is ±0.13 and CT6 is ±0.26. Alloy and density data follow MPIF powder metallurgy standards. The precision metal and ceramic component lines are grouped by material and geometry.
`unit cost = variable price + tooling ÷ quantity + setup ÷ quantity + freight and duty allocation`
| Tooling investment | 1,000 pcs | 10,000 pcs | 100,000 pcs |
|---|---|---|---|
| USD 10,000 | 10.00 | 1.00 | 0.10 |
| CNY 50,000 | 50 | 5 | 0.50 |
| CNY 150,000 | 150 | 15 | 1.50 |
One USD 10,000 mold costs USD 10.00 per part at 1,000 pieces, USD 0.10 at 100,000. A CNY 50,000 to 150,000 mold: CNY 50 to 150 per part at 1,000 a year, CNY 0.5 to 1.5 at 100,000. The amortization base is the fastest lever on the quote.
Published powder metallurgy cost estimating puts press tooling at USD 5,000 to 50,000, with the crossover at 5,000 to 10,000 pieces a year. Rush orders break the model: under a week carries a 25% to 50% premium. The reason is covered in how scheduling and capacity set the lead time.
Compare total project cost, not unit price. Normalize both offers to unit price × quantity + tooling and NRE + freight + duty + documentation. Two quotes 15% apart can land within 2%.
Then look at where the money sits. Tooling plus unit price is about 60% of project spend; the other 30% to 40% hides in setup, secondary operations, packaging, freight and documents. Yujiaxin Tech compares offers this way: two suppliers 9% apart can swap places once CMM reports enter.
Check the channel next. Distributors add 20% to 40% on factory price. Only then is negotiation worth it: a discount on the total yields 3% to 5%, while taking the quote apart finds 8% to 15%. Put tax treatment and the trade term, EXW, FOB or DDP, in writing.
A quote is only comparable if the input is complete. Leave a field out and the supplier adds a margin you pay for.
Annual volume is the field buyers forget, and it decides the process. Above 10,000 pieces a year MIM and PM become viable; 5,000 to 15,000 is where MIM crosses CNC. A precision parts quotation without an annual figure is an estimate.
Six moves work: relax non-critical tolerances, merge operations, substitute an equivalent grade, raise utilization, consolidate volume, negotiate tooling return. Yujiaxin Tech follows the usual Chinese practice on tooling return: a full mold refund at 100,000 cumulative pieces, or half up front with the rest amortized.
Three do not. A blanket promise to beat any competitor by a fixed percentage usually means scope changes later. A complex part with no added tooling usually means tolerance was relaxed. Skipping first article inspection moves cost into rework.
Yujiaxin Tech puts the cost lines on the table in these talks, because a negotiation only works when both sides read the same sheet. ISO 9001 with GJB 9001C is the base, and a detailed quote still does not replace process capability.
Padding in a precision parts quotation hides in the lines nobody asks about. Ask the fifth before the sample run. For inspection cost, see how inspection capability is proven by equipment and method.
Ask a supplier for the six lines and you stop arguing about a total. That turns a precision parts quotation from one number into six you can check, and only two or three of them will move.
Next time an offer lands, ask for the amortization base and the utilization rate before anyone mentions a discount. To test the numbers, send drawings, tolerances and volume to our engineers.
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