Fabrication Tolerances for Dimensional Variance in Sheet Metal and Machined Parts
CNC Machining Tolerances
We specify a standard dimensional tolerance of ± 0.005" for CNC machined parts. However, it is possible to achieve a tighter tolerances on our routers, lathes, 3-axis mills and 5-axis mills. If you require a tighter tolerance, please contact us, as tighter tolerances may increase the cost of your project and have to be clearly defined upon ordering.
Using a thinner sheet metal in CNC machining may require CNC jigs to be used - this may add a cost to your design build. Talk to your account manager about your options - they will confer with our engineering and design services team about your options.
Milled Part
Lathe Part
| CNC Process | Tolerance | |
| Lathe | ± 0.005" | 0.13mm | |
| Router | ± 0.005" | 0.13mm | |
| Router (Cutting Gaskets) | ± 0.030" | 0.762mm | |
| 3-Axis Milling | ± 0.005" | 0.13mm | |
| 5-Axis Milling | ± 0.005" | 0.13mm | |
| Engraving | ± 0.005" | 0.13mm | |
| Surface Roughness (Finish) | 125RA | |