Weve been using small diameter drills (less or equal the diameter 0.5) so far. Whats the point for preventing the breakage?
There are 3 points: 1.The run-out of tools, 2. Fixation of work materials and 3. The Pre-drilling (A Pilot hole): 1. We recommend to set the run-out of tools less or equal 5µm. If the diameter is smaller, the effective will be more. And, we also recommend making use of our measuring equipment to check the run-out of tools during the revolution (dynamic run-out). It’s possible to lend the equipment for demonstration. 2. It is important to fix the work material not to be lifted up for preventing chatter vibration in drilling. 3. A Pilot hole is effective for preventing breakage caused by tools acting up (walking phenomenon) when starting the drilling, and makes the hole registration accuracy improved.
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