3D Printing Tolerances

Dimensional Accuracy and Tolerances

Typical accuracy for FDM printers is around ±0.1 mm, but for our Ultimaker machines ±0.2 mm is more realistic.

For mating parts to print on our machine, leave 0.15–0.2 mm clearance to ensure proper fit.

• Hole = the opening or cavity
• Pin = the protruding post designed to fit into the hole
• Example: Pin = 10.00 mm, Hole = 10.20 mm → gives 0.20 mm clearance for smooth assembly.