Pre-Production Tooling
Ship production parts
Ship production parts
6 weeks sooner.
Bridge tooling.
Aluminum rapid tooling in 14 days runs 500–10,000 production-material shots while steel production tooling builds in parallel. Bridge demand gaps, validate production design, compress launch timing.
01 · When to use it
Three strategic scenarios.
Ship 6 weeks sooner
Product launch acceleration
Pre-production parts fulfill early customer orders, generate revenue, and validate market demand while steel production tooling builds in parallel. 4–6 weeks of earlier cash flow often justifies entire pre-production tool investment.
Real material, real process
Design validation
Test production geometry in production materials before committing to expensive steel tooling. Catch draft-angle problems, gate locations, cosmetic issues — when they cost $3K to fix, not $30K.
Ship 1,000 before committing to 100K
Market testing
Validate customer demand before committing $50K+ to production tooling. If the market responds, build the steel tool. If not, pivot with minimal lost investment.
02 · Timing impact
Pre-production vs sequential tooling.
| Week | Sequential (steel only) | With pre-production tool |
|---|---|---|
| Week 1 | Quote & design freeze | Quote & design freeze |
| Week 2 | Steel tool design | Aluminum tool design |
| Week 3–5 | Steel tool building | Aluminum tool building |
| Week 6 | Steel tool building | First pre-production parts shipped |
| Week 7–8 | Steel tool building | Pre-production run + steel tool design |
| Week 9–10 | Steel tool building | Steel tool building |
| Week 11 | Steel tool first parts | Pre-production still running + steel tool final |
| Week 12+ | Production ramp | Full production ramp (steel tool) |
Net gain: First production parts in customer hands 5–6 weeks sooner with parallel tool strategy. For seasonal launches or funded milestones, this timing advantage is often worth the full pre-production tool investment.
FAQ
Pre-production tooling questions.
Pre-production (or "bridge") tooling bridges the gap between design freeze and full steel-tool production. Build aluminum rapid tooling in 14 days, run 500–10,000 production-material parts, while steel production tooling takes its full 6–8 week build time. Customer-facing shipping starts 6 weeks earlier — major competitive advantage for product launches and seasonal demand.
Simple aluminum single-cavity injection tool: $1,500–3,500. Medium complexity with side actions: $3,500–6,000. Multi-cavity family mold: $5,000–12,000. Compare to steel production tooling at $15,000–80,000. Pre-production tooling is often 1/5 the cost of full production tooling while enabling real-material production runs.
Yes, nearly all thermoplastics: ABS, PC, PC/ABS, PP, nylon, POM, PBT, TPE, TPU. Aluminum tools have slightly faster cycle times than steel (better heat dissipation). Glass-filled materials wear aluminum tools faster — plan on 3,000–5,000 parts vs 10,000 for unfilled materials. For abrasive materials on large production volumes, steel remains the better choice.
Three scenarios: (1) Product launch timing — pre-production tool enables early customer shipments while steel tool builds. (2) Design validation — catch production design issues in real production materials before committing $50,000+ to steel tooling. (3) Uncertain market demand — pre-production tools enable "test the market first" strategy for 500–5,000 units before committing to full production volume investment.
Geometrically: yes — both are injection molded in the same material from precisely machined tools. Slight differences: aluminum tool parts may have ±0.05 mm vs steel tool parts at ±0.025 mm (aluminum thermal expansion slightly larger). Surface finish: SPI-B1 standard on aluminum vs SPI-A2 polish on steel. For most production applications, parts are indistinguishable to end users.
Yes — common practice. We build the aluminum pre-production tool first (14 days), then immediately begin steel production tool design and build (6–8 weeks) with lessons learned from the aluminum tool runs. This parallel approach compresses overall program timing by 4–6 weeks vs sequential tool builds.