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How long does it take to make an injection mould?
A production steel injection mould usually takes from several weeks to a few months to reach its first trial shots: Komaspec quotes 45 to 65 days for a normal build, while MakerVerse gives 8 to 20 weeks for a full production steel mould, and prototype tools can be much quicker.
The spread between those figures is real, not a typo. It reflects different tool types, different part sizes and different definitions of "done". This article sets out the published numbers, explains what a quoted date usually stops at, and lists what you can do to keep your own project close to the quote.
Published build times by tool type
The table below collects figures from public pages. Supplier figures for their own quick-turn services are marketing claims for best cases ("as fast as"), so they sit at the short end; general guide figures are wider.
| Tool or milestone | Published time | Source | Type of figure |
|---|---|---|---|
| Aluminium prototype mould | 2 to 4 weeks | MakerVerse | General guide |
| Soft-steel or bridge mould | 4 to 8 weeks | MakerVerse | General guide |
| Full production steel mould | 8 to 20 weeks | MakerVerse | General guide |
| Normal build, order to T0 | 45 to 65 days | Komaspec | Supplier typical |
| Small, low-cavity tool, to first samples | about 5 weeks | Komaspec | Supplier typical |
| Quick-turn tooling | 10 to around 21 calendar days | Fictiv | Supplier best case |
| T1 samples | 2 to 3 weeks | Fictiv | Supplier service |
| T1 samples | as fast as 5 business days, 3 weeks typical | Xometry | Supplier service |
| Simple single-cavity tool, as often quoted | 8 to 12 weeks, can become 14 to 16 weeks | QualityInspection.org | Industry commentary |
Fictiv adds that parts larger than 300 mm may take longer than its standard range. Protolabs says some moulding orders can ship in as fast as one day and standard times as fast as 7 days; treat those as the fastest end of a dedicated quick-turn service, not a planning figure for a complex production tool.
Worked examples from one supplier
Komaspec publishes three example builds, all timed to first samples (T0). They show how size and steel grade move the date:
| Part size | Cavities | Steel | Time to T0 |
|---|---|---|---|
| 43 × 25 × 15 mm | 4 (2 + 2) | S136 | 5 weeks |
| 220 × 123 × 71 mm | 1 | S136 | 6 weeks |
| 380 × 310 × 95 mm | 1 | S136H | 8 to 9 weeks |
These are one supplier's examples, not a rule, but the pattern (bigger part, longer build) matches what Fictiv says about large parts.
What the quoted date actually means
Most confusion comes from comparing dates that end at different points. Komaspec explains that build quotes normally run to T0, the first shots off the new tool, and that T1 is the first round of samples formally submitted to the customer. T0 parts are usually not the end of the job: adjustments at the press follow, and only then do approved samples exist.
The clock also tends to start later than buyers expect. QualityInspection.org points out that machining usually does not begin when the purchase order is placed, because the design first has to pass a manufacturability (DFM) review, open questions must be closed and the final tool design must be approved. Komaspec makes the related point that your own approval time is part of the timeline and can change it substantially.
A typical sequence, with no durations attached because they vary so much by project:
- Quote and order.
- DFM review of your part, and your answers to the toolmaker's questions.
- Mould design, then your approval of the tool drawing.
- Steel or aluminium machining, finishing and assembly.
- T0 trial shots and adjustment at the press.
- T1 samples submitted to you for measurement and approval.
- Further trial rounds if changes are needed, then production approval.
What stretches the build
- Part complexity. QualityInspection.org notes that the commonly quoted figure assumes one part, one cavity, no sliders or undercuts and a standard steel. MakerVerse calls undercuts one of the most common reasons a mould costs more and takes longer than expected.
- Several tools in one product. If a product needs several moulded parts, the slowest tool sets the date for the whole assembly, as QualityInspection.org observes.
- Size and cavity count. Komaspec says larger and more complex parts take longer, and that small, low-cavity tools are the quickest.
- Steel choice. Komaspec notes that steel grade affects machining time; aluminium is usually chosen for speed to first parts.
- Design changes after machining starts. MakerVerse warns that complex revisions after the mould is cut can push the timeline back by weeks, and Komaspec says changes can even mean starting the tool again.
- Slow responses. Every DFM question or sample approval that waits on you waits on the whole project.
How to keep close to the quote
- Freeze the design before ordering the tool; finish prototype testing first.
- Run a DFM review before steel is cut. MakerVerse describes a pre-tooling design review as the single biggest lever against both cost and time surprises.
- Fix draft, wall thickness and undercuts at the DFM stage rather than after T0.
- Name one person on your side who can answer the toolmaker's questions quickly.
- Agree in writing what date the quote runs to (T0 or T1) and how many trial rounds are included.
- Add a buffer for at least one round of adjustment after first samples.
These are published ranges for planning, not commitments. Ask your toolmaker for a dated schedule for your specific part.
Questions buyers ask
Why do two suppliers quote such different times for the same part?
They may be quoting different tools (aluminium against hardened steel, one cavity against four) or different end points (T0 against approved T1 samples). Ask each one to state the tool type, the steel, the cavity count and exactly which milestone the date refers to before comparing.
Is an aluminium mould always faster?
Aluminium is usually chosen for speed to first parts, as Komaspec notes, and MakerVerse's ranges for aluminium prototype moulds are shorter than for production steel. The trade-off is tool life, so a fast aluminium tool may not suit a long production run. Confirm the expected tool life with the toolmaker.
When does the clock really start?
Usually after the DFM review is closed and the tool design is approved, not on the day you pay the deposit. Ask the supplier to state the start trigger in the quote so both sides measure from the same day.
How many trial rounds should I expect?
None of the sources reviewed here publishes a typical number, so treat it as something to negotiate. Ask how many adjustment rounds are included in the price and how long each extra round takes.
Does reordering parts take as long?
No. MakerVerse notes that reorders are much faster than first orders because the mould already exists, so only moulding and shipping remain.
Sources
- Komaspec, Injection mould tooling guide (types, costs and build timings): https://www.komaspec.com/about-us/blog/injection-mold-tooling/
- MakerVerse, Injection Molding FAQ: https://www.makerverse.com/resources/injection-molding-faq/
- Fictiv, Injection Molding Prototypes: https://www.fictiv.com/injection-molding-prototypes
- Xometry, Injection Molding Service: https://www.xometry.com/capabilities/injection-molding-service/
- Protolabs, Injection Molding Service: https://www.protolabs.com/services/injection-molding/
- QualityInspection.org, Why Injection Mold Tooling Often Takes Longer Than You Were Quoted: https://qualityinspection.org/why-injection-mold-tooling-often-takes-longer-than-you-were-quoted/