Design guidelines for CNC machining

Few and simple rules to design the best and get the most out of your 3D design

FILE FORMAT
.STEP  .STP – Only files with SINGLE parts are accepted


MIN and MAX OVERALL DIMENSIONS
minimum size at least 10 mm (0.39 in) on every side, with minimum total volume of 3 cm3
max size 460x460x400mm (18x18x15.7 in) but may vary with materials; please check here the specific data for your material.


WALL THICKNESS
Nominal thickness of your workpiece should be greater than 1 mm.  Watch out for details that are less than 1 mm because they usually won’t survive the working process. 


TOLERANCES
Our equipment versatility and precision allows choosing between 3 tolerance levels: ±0.05mm, ±0.07mm, ±0.10mm.
Moneysaver: most convenient tolerance: ±0.10mm


TYPE ENGRAVING AND LOGOS
Minimum rod width of 1mm and max depth of 1mm: by clicking here you will find a list of specifically created characters for the CNC, including some free ones. We suggest to use Sans Serif fonts >20 points and >5mm high.
Moneysaver: Sans Serif fonts are much less expensive than Serif fonts • Engraved features are much less expensive than embossed because less material is removed .


GORGES, POCKETS AND RADII
1mm minimum, diameter 1/3 times bigger than the height.
Moneysaver: 4mm are roughly 7 times less expensive than 1mm


MINIMUM CONVEX CORNER RADIUS
minimum 1mm


EXTERNAL THREADS AND THREADED HOLES
We perform external or internal threads also metric rolled threads M and MF from M2 to M16 and GAS from 1/4, 1/8, 1/2 and 3/4. Due to absence of unified criteria for defining threads between various CAD packages, internal thread drawing is not necessary just draw pre-hole holes with the correct ISO diameter of the desired thread, such as 4.2 mm for an M5. Blind hole threads are applied at a maximum of 3/4 of the hole. Click here for threads table
External threads can be done until 2 mm to the end of the cylinder, if you need to close it all, please design a 2 mm groove on the bottom.


Following these simple rules will make it much easier for you to get great results.
If in doubt, do not hesitate to contact us