When should a hardware startup choose CNC vs sheet metal vs casting?
CNC is best for tight-tolerance structural parts, custom mating surfaces, and low volumes where tooling cost matters more than unit cost. Sheet metal is best for enclosures, brackets, and formed structures where you need thin-wall geometry at low to mid volume without casting tooling. Casting makes sense at higher volumes when the geometry is complex, the part repeats, and the unit cost savings justify the tooling investment.
Why this becomes hard
The process choice affects lead time, cost, minimum quantity, and what tolerances are achievable. Teams often pick CNC because it is familiar and fast to quote, then discover the unit cost is too high for volume, or pick casting before they have locked the design and pay for tooling that needs to be remade.
What teams usually miss
Prototype and production quantities often call for different processes. A part that makes sense as CNC at ten units may need to be redesigned as a casting at one thousand units. Making that decision at the prototype stage—or at least designing for it—saves a costly redesign cycle.
What KnowYi does
KnowYi reviews your design intent, batch quantity, delivery timeline, and tolerance requirements to recommend the right process for your stage. We quote across CNC, sheet metal, and other relevant processes so you can see the trade-offs before committing.
What to send us
STEP or IGES files, 2D drawings if available, material requirements, surface finish requirements, batch quantity, and target delivery date.
If you already have CAD, drawings, BOM, Gerbers, or even an incomplete file package, send it to KnowYi. We can turn it into a clear manufacturing path with missing inputs identified, quote blockers flagged, supplier routing handled, production records maintained, and delivery evidence returned.