Tolerances are a function of the process, material, geometry, and the overall size of the part. Here is our standard tolerancing:
Carbon DLS, FDM, Polyjet, SLA and SLS 3D printing tolerances are +/- 0.005” for the first inch and +/- 0.002” per inch thereafter. (Z plane starts at +/-0.010” for the first inch).
HP MJF 3D printing tolerances are +/- .010” for the first inch and +/- .003” for per inch thereafter.
Guaranteed tolerances are confirmed on a case by case basis.
Flat parts, thick parts, and uneven wall thicknesses can cause deviations and warp, which can make tolerancing difficult to hold.
Most tolerances can be improved with multiple builds used to build shrink into the files to optimize each build, similar to “dialing” in a CNC machine or injection mold press