A hardware startup goes from prototype to production in stages: DFM review before tooling, bridge tooling or low-volume processes for pilot builds, then production tooling once the design is stable. Plan for MOQs, sampling rounds, and 8–14 weeks of production tooling lead time. SSG connects you with principals that take early-stage programs and quote each stage.


SLS, MJF, SLA, FDM, and metal printing for prototypes, fixtures, and low-volume production parts.

Production-like plastic and rubber parts cast in silicone molds, typically 10–200 parts in one to two weeks.

CNC milling, turning, and production sawing from bar, plate, castings, and forgings, from prototype to production.

Laser-cut, punched, bent, and welded sheet metal enclosures, brackets, and chassis with no hard tooling.

Molten thermoplastic injected into a steel or aluminum mold. Lowest piece price for plastic parts at 5,000+ a year.

Molten zinc or aluminum injected into steel dies at high pressure. Thin walls and net shape at 2,500+ parts a year.

Compression, extension, and torsion springs, wire forms, and fourslide clips made from round wire and flat strip.

Parts made by vetted overseas manufacturers, with landed-cost analysis, quality control, and logistics managed.
Parts per order
5 processes are at their best at this quantity, and 1 more can do it.
Get a DFM review before steel is cut. Uniform walls, 1–2° of draft, and generous radii are cheap to change in CAD and expensive to change in a mold. Keep late changes steel-safe, so the toolmaker removes metal rather than adding it.
Aluminum or P20 bridge molds cost a fraction of hardened production steel and typically ship in 3–6 weeks. They cover EVT, DVT, and PVT builds and early sales, and they run thousands to tens of thousands of parts.
Suppliers set minimums around setup time, material lots such as a full bag of resin or a coil of steel, and finishing lot charges. Expect a higher piece price on your first runs, and ask each supplier what drives its MOQ.
Your product may need FCC Part 15, UL 62368-1, CE marking, and UN 38.3 for lithium batteries. Part suppliers support those with material data, such as UL-listed resin grades, so name them in the RFQ.
If you pay for tooling, you should own it. Put ownership, maintenance, and transfer rights in writing before the first tool is built.
As a rule of thumb, cast urethane or 3D printing wins below a few hundred parts, aluminum bridge molds from a few hundred to about 10,000, and hardened steel beyond that. Part size, cosmetic needs, and how settled the design is move those lines.
Bridge tooling is faster, lower-cost tooling, usually aluminum or soft steel, that makes production-quality parts while production tooling is built or the design settles. Use it for pilot builds and first sales when time to market matters more than piece price.
Yes. Send CAD, drawings if you have them, target volumes by stage, and your timeline. SSG matches you with principals that take early-stage programs and can carry the part into production.
STEP files, 2D drawings for critical features, material and finish, quantities for pilot and production, target dates, and required certifications. Quantities for each stage let suppliers quote bridge and production tooling side by side.
Send us the part.
Build it or upload a drawing. A rep routes it to principals already making parts for this industry.