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发表于 2009-12-24 00:02:04
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Since we do not know the detail of your drill we assume it is good for cutting A3 steel. We also had this problem before. Below is our solution: 1. drill a precise pilot hole, 2. increase your coolant pressure ( you can use high presssure coolant system), 3. selet a good drill for deep hole ( currently many tool makers have launched a similar type of drill like Mapal Mega Deep Drill (http://www.mapal.com/en/products ... ls/mega-deep-drill/), Walter Titex XD Bohrer drill and even OSG and Mitsubishi also developed this type of drill |
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