CNC Machining
Precision milling, turning, and machining for prototypes and end-use metal or plastic parts.
Explore serviceCustom Parts Manufacturing from Prototyping to Production
Explore eight core manufacturing processes for precision custom parts, from rapid prototypes and low-volume runs to full-scale production. When your project also needs electronics, our PCB and assembly capabilities can support the complete product.
- Eight core processes for custom metal and plastic parts
- Fast prototyping, low-volume production, and scalable manufacturing
- Engineering and quality support from DFM through final inspection
Choose the Right Process for Your Custom Parts
Start with RapidDirect’s eight core on-demand manufacturing processes. Electronic manufacturing follows as an additional path when your product also needs boards, components, or assembly.
Mechanical Manufacturing
Manufacture precision metal and plastic parts from one-off prototypes to repeat production, using the process that best fits geometry, material, tolerance, and volume.
Injection Molding
Plastic parts from fast or production tooling, from validation builds to high-volume production.
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Sheet Metal Fabrication
Laser cutting, bending, welding, stamping, and finishing for custom sheet metal parts and enclosures.
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3D Printing
Fast functional prototypes and low-volume parts using SLA, MJF, SLS, SLM, and other additive processes.
Explore serviceElectronic Manufacturing
Add board fabrication, sourcing, assembly, and testing when your project extends beyond mechanical parts into a complete electronic product.
PCB Design
Develop and optimize board designs for performance, manufacturability, and scale.
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PCB Manufacturing
Produce rigid, flex, rigid-flex, HDI, metal-core, RF, and ceramic circuit boards.
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Components Sourcing
Source turnkey, partial, or consigned BOMs with review and alternative-part support.
Explore serviceWhat Are You Building?
Start with your mechanical part or production goal. Electronic manufacturing is available when the project also includes boards, components, or assemblies.
Choose the right process for every custom part
Compare machining, molding, sheet metal, additive manufacturing, casting, extrusion, and EDM around your design requirements.
Validate your design before production
Use fast prototypes and production-like parts to test fit, function, material choice, and manufacturability before you scale.
Move proven parts into repeat production
Select production-ready processes, control critical requirements, and build a repeatable path from pilot runs to higher volumes.
Extend your product with electronic manufacturing
Connect PCB design, fabrication, component sourcing, assembly, inspection, and testing after the mechanical product requirements are defined.
From Custom Parts to Production-Ready Products
Keep part design, process selection, prototyping, quality, and production aligned. Add electronics and assembly only when the product requires them.
A practical path from part to production
Design & DFM
Review geometry, materials, tolerances, cost drivers, and manufacturability before release.
Prototype Parts
Build fast custom parts to validate form, fit, function, and process choice.
Pilot Production
Confirm tooling, inspection, assembly, and repeatability with production-intent builds.
Scale Production
Move approved parts into reliable repeat production as demand grows.
Validated custom parts move into repeatable production—with electronics and assembly added when needed
Electronic + Mechanical + Assembly
Connected under one manufacturing partner
Quality Built into Every Custom Part
Documented reviews and inspections help control dimensions, materials, surface requirements, and repeatability from prototype through production.
01 · REVIEW
DFM & Risk Review
Identify geometry, tolerance, material, tooling, and process risks before production release.
02 · VERIFY
Material Verification
Confirm specified materials and incoming requirements before manufacturing begins.
03 · INSPECT
In-Process Inspection
Monitor critical dimensions and process controls during manufacturing to catch issues early.
04 · CONFIRM
Final Inspection
Verify dimensional, visual, and documentation requirements before shipment.
See How Manufacturing Projects Move Forward
Explore how custom parts progress from early validation to production, with electronic manufacturing added when the product requires it.
Mechanical
RapidDirect CNC Machined Custom Precision Mount for the M-73 Prismatic Compass
RapidDirect helped Lin CNC machine a custom precision mount for the M-73 prismatic compass with fast turnaround and high accuracy.
FDM 3D printing, CNC machining
Neck Massager Project: From Concept to Mass Production
A case study on how RapidDirect helped bring a wellness product to market through integrated design, prototyping, and production services.
CNC Machining
RapidDirect x UIUC iRobotics Team: Build a Combat Robotic
For the University of Illinois Urbana-Champaign (UIUC)’s iRobotics team, engineering isn’t just a classroom subject—it’s a full-contact sport.