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​How To Drill Deep Holes

Hone-All Precision Ltd News and PR from Hone-All Precision Ltd - Published 02 March 2026 Drilling deep holes is not simply a matter of using a longer drill.
As hole depth increases, the process becomes far more difficult to control and requires specialist equipment to achieve consistent results.

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In general engineering, a hole is generally classed as a deep hole when its depth reaches ten times its diameter

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