Design Guide


Maximum dimensions/bounding box

  • Material-dependent (x/y/z):
    alumina (FormAlox 999, FormAlox 998): 83.6 x 52.4 x 156.8 mm
    zirconia (FormAcon 3Y): 80.3 x 50.3 x 146.5 mm
  • These dimensions reflect the limitations of the building platform and include the room for shrinkage (linear shrinkage of approx. 30%)


  • These tolerances apply: ± 1 % of the length with a maximum of ± 0.1 mm
  • Higher levels of precision can be achieved by iterative approximation
GB_Grafik_3__Production ready_geometry_komp

Production-ready geometry

  • A flat output surface is required for adhesion to the construction platform
  • Printing time depends on the height of the product (Z-orientation)
  1. Staircase effect by layer structure (layer- dependent 25-100 µm)
  2. Surface quality depends on orientation (X/Y- orientation);
    pixel resolution (32x32 µm after shrinkage)

Cross-section variation

  • Avoid cross-section connectors since the shrinkage significantly increases the likelihood of crack formation during subsequent thermal processes
  • This problem can easily be circumvented by adding radiuses: Rmin 0.3 mm

Maximum wall thickness

  • Material-dependent:
    FormAlox 999: 4 mm
    FormAlox 998: 6 mm
    FormAcon 3Y: 3 mm
  • Stronger wall thicknesses can result in crack formation during thermal processes
  • Wall thickness can be adjusted by design alterations

Gaps and small distances

  • Minimum distance geometry / material-dependent: about 0.2 mm
  • Smaller distances may lead to loss of separation caused by process


A Free overhangs up to approx. 1 mm are possible (material-dependent)
B Free bridging up to approx. 2 mm is possible (material-dependent)
C Support structure is absolutely required for overhangs > 60°. Try to avoid support structures. They will leave slight imprints after removal
D Radii may allow overhangs without supports


Drillings and channels

  • Minimum diameter is geometry- and materialdependent: approx. 0.2 mm
  • The process may cause openings to turn out smaller. Recommendation: design drillings and channels slightly bigger than required. We can advise and consult you in this matter
  • Blind holes are producible; through bores are better for the cleaning process
  • Recommendation: The best drilling quality will be achieved using Z-orientation


  • Metric threads ≥ M1.6 producible
  • Threads have to be designed as a geometry in CAD, no simplified representation
  • Ceramic threads show slackness caused by the material
  • Ceramic threads will not be as mechanically robust as metallic threads


  • Avoid enclosed cavities since cleaning is impossible
  • Recommendation: Small openings will allow for cleaning

Sharp edges

  • Sharp edges converging to zero are not producible
  • Process-dependent minimum: 32 µm

Mechanical load

  • Avoid tensile loads and bending loads


Steinbach AG – your professional partner for technical ceramics in 3D-printing

With us you have a professional contact partner serving you from the consulting up to the delivery of your 3D-ceramic components. Call us, we are looking forward to the new technical challenge.

Any queries regarding this product? Then contact us using this form or call:

+49 5231 9607-49

We will be happy to advise.