Micro drilling and micro machining are becoming more common as parts become smaller and smaller. The features from micro operations are key to the integrity and function of a given product. Plus, many of the parts have high volume repetitive features so drill time ultimately rivals cost and quality in terms of importance.
When it comes to feeds and speeds, a 0.031" carbide drill plunging into aluminum needs to run at 600 SFM and .00093 inch per revolution. Using a feeds and speeds calculator, this means the RPM needs to be set at roughly 72,000 and plunge at 70 inch per minute. For a part with 400 holes, this would take roughly 7.5 minutes on a conventional cnc mill with 10,000 RPM. On a micro drilling machine with 72,000 RPM it would take roughly 2 minutes for the same operation. This is why having high RPM to meet the SFM is so important when doing micro drilling and machining.
If you have any micro drilling or machining needs then please contact us for quote.