Depth-to-diameter ratio for holes in milling

Drilling holes in milling is limited to certain depth-to-diameter ratios, with the process slowing down as the hole gets deeper.

Updated over a week ago

To use the depth-to-diameter feature in milling, follow these steps:

  1. Go to the relevant milling machine.

  2. Scroll down until you come to "Features", select "Any direction"

3. Set "Through" or "Not Through" and set the minimum and maximum base ratio, in the example "0" and "2".

4. Set prices for the base ratio, one for set up (one-off) and one for this hole, counted per ordered copy. This will cause the hole if one copy is ordered to cost 2 euros, but if, e.g. 2 copies are ordered the hole per copy will only cost 1.5 euros.

5. Repeat all of the above for a hole that's deeper but still possible, like this:

What will happen now: A simple "through" hole with a depth-to-diameter range within the ranges given above will pass with the cost as set, however a hole that's deeper will be flagged. Quoting does not stop, but the customer is warned that there may be changes to his design necessary

One last refinement: You can let the end user choose which kind of thread or fit he wants in the hole, and put different prices for different types of threads. The choice will show up in a dropdown in the column fit/thread:

To keep it simple, only the "Simple" holes were described above. Digifabster can differentiate between "Simple", "Countersunk", "Counterbored", "Counterdrilled" and "General". For the "Countersunk", "Counterbored", and "Counterdrilled" holes, the depth and diameter that are measured are those of the deepest-lying cylindrical parts, in green below:

"General" means a hole with a cylindrical part but not fitting the descriptions of "Simple", "Countersunk", "Counterbored", or "Counterdrilled".

NB: If a hole type is not set up, it will be ignored by the tool.

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