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Here you will find information on restrictions for various milling or engraving objects that have emerged over time through experience, as well as some related design tips.

Limitation on drill diameter and corner radii

The smallest available tool, a milling cutter with a 1 mm diameter, provides the following limitations:

Drill hole diameter ≥ 1.0 mm
Corner radius ≥ 0.5 mm.

Please note that drilled holes with a radius of 1 mm may not be deeper than 4.5 mm.

Standard corner radius

If corner radii are not mandatory, an optimal price can be achieved if by selecting the (usual default) corner radius of 1.5 mm, as this can also be cut by the "workhorse", the 3 mm milling cutter, and thus no (cost-incurring) tool change need be made.

Overlapping objects

In principle, placed objects may overlap as you like. This makes it possible to create special contours, both inside and well as along the edge of the main plate. The following should be noted here:

Objects may not project more than 3 mm outside the edge of the main plate (otherwise the clamping of the main plate will be inadmissibly impeded).
Avoid allowing engraving objects such as drilled hole, cutouts etc. to overlap, as the greater the width of the engraving the greater the risk that the in-fills may "leak".
Neighboring objects

If two large-scale cutouts are placed very close to one another, so that they are only divided by a narrow strip of material, this could start to vibrate during the milling process and at worst may break. The distance between two such cutouts should therefore be at least 3-4 mm. The smaller these cutouts are the more this precautionary measure is relativized.

Manufacturing tolerances

Whereas the positioning accuracy of the machine tools is 0.02 mm, manufacturing tolerances of 0.05 up to 0.10 mm can generally be expected due to tool wear etc.

If you want to specify a drilled hole for a round connector for example, you should add 0.2 mm (0.3 mm for a D-hole) to the diameter of the thread and specify this as the diameter of the drilled hole so that it fits well.

Thread diameter and panel thickness

Threads in thin panels are only of limited value. An M8 thread in a 2 mm panel for instance can hardly be called a "thread". As a guide, an M3 thread for a 2 mm panel and an M4 thread for a 3 mm panel provide sensible upper limits.

Up-to-date information also in the support forum