From Xometry's Manufacturing Standards:
- +/- 0.005” for the first inch is typical, plus +/- 0.002” for every inch thereafter. However, Xometry does not guarantee tolerances on the first attempt of a new design. Tolerance expectations can vary across different materials (e.g. stainless versus aluminum).
- Internal stresses during build, support strategy, and other geometry considerations may cause deviation in tolerances and flatness.
- Items and geometries which require strict flatness are not a good fit for this process.
- Expected surface roughness is 150-400 µin RA, depending on build orientation and material used for the build.
- Tolerances as-built(This includes stress relief): Expected tolerances are +/-.005” +.002”/inch.
- Tolerances after secondary heat treat or HIP: Expected tolerances are +/-.008” +.002”/inch.
- Surface Finish: Expected surface finish is 200-400 uin RA(depending on build orientation).
THREADS: Threads “as-built” will have limited functionality. If functional threads are required post machining will be necessary.
Due to the layer nature of the build process, general Geometric dimensioning and tolerancing (GD&T) principles such as flatness, hole concentricity, and parallelism may vary based on build orientation.