Drilling! With Kastner-Tools.

For optimum preparation of deep hole drilling from 8xD, a guide channel for the deep hole drill should be produced by a pilot hole drilled upstream. Here, a pilot drill of at least the same diameter size is used to pre-drill up to approx. 2xD in order to achieve ideal positioning and guidance of the deep hole drill.

The pilot drills from Kaestner-Tools allow not only the creation of a guide hole necessary for the deep hole drill, but also the creation of a counterbore at the entrance to the hole. This eliminates the need for subsequent countersinking with a special countersinking tool.

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