Tight-Tolerance Components, Verified for Assembly
Engineering projects often stall when parts fail at the assembly stage. PartsMake provides a reliable path from CAD file to inspected, ready-to-assemble hardware for functional prototypes and volume production.
Precision starts with measurable requirements
Dimensional control, process capability, temperature stability, and inspection data work together to protect your assembly.
Precision is a process, not just a machine setting
Our manufacturing environment is controlled to support dimensional stability and repeatability, ensuring that the 100th piece matches the 1st. Multi-axis CNC milling, turning, grinding, and rigorous inspection are matched to the geometry, material, and tolerance requirements of each project.
Separate standard dimensions from critical features and specify the required GD&T controls.
Choose milling, turning, grinding, Swiss machining, mill-turn, or EDM based on access and stability.
CMM, optical measurement, FAI, and full dimensional reports provide evidence against the print.
Precision machining specifications
| Specification | Capability |
|---|---|
| Standard tolerance | ±0.01–0.05 mm |
| Precision tolerance | Down to ±0.005 mm |
| Flatness | 0.01 mm / 100 mm |
| Parallelism | Down to 0.01 mm |
| Perpendicularity | Down to 0.01 mm |
| Position tolerance | Down to Ø0.01 mm |
| Surface roughness | Ra 0.4–3.2 μm |
| Minimum feature / wall | 0.5 mm |
The right setup strategy for difficult geometry
Precision depends on fixturing, tool path optimization, thermal stability, and the right process sequence—not only on machine specification.
5-Axis Machining
Complex geometries in a single setup reduce re-fixturing errors and positional variance.
Mill-Turn
Turning and milling in one operation supports intricate cylindrical parts with offset features and tight concentricity.
Swiss Machining
Small shafts, pins, and connectors up to Ø32 mm benefit from increased stability.
Precision Grinding
Surface, cylindrical, and centerless grinding support mating parts and wear surfaces.
EDM
Wire and sinker EDM handle hardened materials and complex internal geometries.
Every critical feature should have a verification path
A part is only as good as the data that verifies it. Our inspection department uses CMM technology and optical measurement systems to support strict adherence to Geometric Dimensioning and Tolerancing requirements.
Recommended tolerance selection
Identify key dimensions, mating surfaces, datum features, and functional fits on your drawing. Reserve the tightest tolerance class for dimensions that affect assembly or performance.
Dimensional reports
Verify critical features against the engineering print with coordinate measurement data.
First article inspection
Confirm process stability before full production begins.
Material certification
Maintain full batch traceability for raw materials.
Hardness testing
Confirm heat-treated components meet specification.
Stable results across demanding engineering materials
Precision machining requires an understanding of how materials react to cutting forces, heat, and stress.
Aluminum
6061-T6, 7075-T6, 2024
Stainless Steel
303, 304, 316, 17-4PH, 15-5PH
Alloy & Tool Steel
4140, 4340, D2, H13
Exotics
Titanium Grade 5, Inconel 625/718
Engineering Plastics
PEEK, POM, PTFE, Nylon, PC
A practical path from difficult part to reliable assembly
Precision machining is best suited to projects where quality documentation and dimensional accuracy are non-negotiable.
Tight fits and specific mating surfaces require the grinding and milling capability to ensure components assemble correctly.
Consistent systems support the transition from prototype to production volumes of 1–100,000+ pieces.
Thin walls, deep cavities, and complex multi-face orientations can be addressed with 5-axis machining and EDM.
Send the details your precision part needs
For accurate pricing and lead time, include your technical drawings and 3D models along with tolerance requirements, material specifications, and desired quantity.
Start your RFQ
Share your project requirements and our team will review the best process and inspection approach.