Five checks before comparing CNC quotes.
If five factories quoted the same CNC drawing and the prices differed by 30% or more, what would you check first?
Start with what each price covers. Machining routes, equipment efficiency and risk allowances can affect cost, but first establish whether the suppliers are quoting the same delivery and acceptance requirements.
Drawing revision and material
Confirm that each quote uses the same released drawing and matching model. Specify the material grade, applicable standard and supply condition, plus any required material certificate. A description such as "aluminium part" leaves room for different assumptions. Resolve drawing-model conflicts before comparing offers.
Quantity and one-time charges
Align order quantity, batch sizes and delivery arrangements. Ask whether programming, fixtures and other one-time charges are included in the unit price or listed separately. For repeat orders, confirm which charges would apply again. A prototype quote and a production-batch quote need different cost comparisons.
Acceptance and inspection
Use the same approved tolerances and acceptance requirements. Agree which features will be inspected, the inspection scope and the records supplied with the parts. Do not assume that a promise to meet a tolerance includes a particular report. Any proposed deviation needs the buyer’s approval before it becomes the order basis.
Finishing and delivery condition
Check specified heat treatment, surface finishing, deburring, cleaning and packaging. Make clear whether critical dimensions are accepted after the final treatment. If an operation is not listed, ask whether it is included, excluded or simply needs clarification. An unclear quote is a question to resolve, not proof of an omission.
Timing and commercial scope
Define when lead time starts and whether it ends at production completion, dispatch or arrival. Align currency, quote validity, payment terms, freight and tax scope. Where a trade term is used, state its version and named place. A unit price alone does not show the full delivery arrangement.
Compare the scope, then the price
Put inclusions, exclusions and open questions side by side. Once the scope is aligned, ask suppliers to explain the remaining price differences. Different setups or machines can meet the same requirements unless a process is specified. A higher price does not prove reliability; a lower price does not prove that something is missing.
Have a drawing to discuss?
Molitech supplies build-to-print machined parts through independent partner manufacturers. We clarify drawing questions, agreed inspection documents and delivery scope before the order, giving you a clear basis for reviewing our quotation.
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