Plastic Rapid Prototyping

Tolerance depends on the prototype method, material, and which features actually matter for fit or function. We don’t promise a blanket number before reviewing the CAD. We first identify CTQ features and datums, then confirm what’s realistic and repeatable in the quote.

As a practical reference:

• Fit-critical features (CNC or production-intent builds): typically ±0.05 mm on controlled features

• General prototype features: typically ±0.10–0.30 mm, depending on size and process

• 3D-printed or casting prototypes: tolerance varies by geometry and material; critical interfaces are reviewed individually

If you have tight assemblies or GD&T callouts, flag them. We’ll confirm achievable tolerances during DFM and can support dimensional or CMM reports where needed.

Yes. We support CTQ feature control and GD&T on prototype parts when those features are tied to fit, function, or downstream production requirements.

We review CTQ dimensions, datums, and GD&T callouts during DFM before any parts are built. The build method, fixturing strategy, and inspection approach are planned around those critical features—not treated as an afterthought.

For prototypes that require verification, we can provide dimensional reports or CMM reports to confirm CTQ features. The same CTQ definitions can also be carried forward into pilot runs and production-intent builds to avoid rework later.

We provide inspection reports based on the prototype’s purpose and how the part will be evaluated. Not every prototype needs the same level of inspection, so we align the report to your CTQ features and project stage.

Typical inspection options include:

• Dimensional inspection reports for specified features and fit-critical interfaces

• CMM reports for tight tolerances, GD&T, and repeatability checks

• First Article Inspection (FAI) for pilot or production-intent prototypes

• Material certificates when production-intent resins are used and traceability is required

If certain dimensions, datums, or standards must be verified, let us know during quoting. We’ll confirm the inspection scope up front and include it with the prototype build.

Choose the prototype stage based on what risk you’re trying to remove next. The two serve different purposes.

Early functional prototypes are the right choice when:

• You need to verify fit, function, or interfaces

• Design changes are still likely

• You’re validating geometry, snap-fits, threads, or assemblies

• Speed and flexibility matter more than repeatability

These are typically used to answer: “Does the design work?”

Pilot prototypes make sense when:

• The design is largely frozen

• You need repeatability and consistency, not just one-off validation

• Material behavior, shrinkage, or process stability must reflect production

• You’re preparing for production release, testing, or internal approval

These are used to answer: “Is this ready to move into production?”

In practice, many projects start with early functional prototypes and move to pilot builds once the design is validated. We help define that transition during DFM so you don’t commit to pilot tooling too early—or stay in early prototypes longer than necessary.

To quote a plastic rapid prototyping project accurately, we need enough information to choose the right build method and confirm any risks up front.

At minimum, please provide:

• CAD files (STEP or IGES preferred)

• Target quantity

• Material preference (or intended use if material is still flexible)

If available, also include:

• CTQ features, tolerances, or GD&T callouts

• Intended prototype purpose (appearance, functional testing, or pilot validation)

• Finish or cosmetic requirements

• Assembly context or mating parts, if fit is critical

• Inspection or documentation needs (dimensional report, CMM, FAI)

If some of this isn’t finalized yet, that’s fine. Send what you have—we’ll flag open items during DFM and confirm the final scope in the quote.