Flow Drilling and Tapping

Precise threaded connections for thin wall applications.

Flow drilling uses heat to drill holes into metal to produce a bush. This process has always been problematic when using tubular materials as the wall is so thin particularly where a thread pitch is greater than the wall thickness. With flow drilling and tapping, the problems of tapped inserts spinning are avoided.

The DDI Engineering advantage is:

• Flow tapping removes none of the parent metal which enables us to tap into thin wall materials with a range of M3 – M12 threads.
• The bush formed gives three to four times the original material thickness in most cases.
• High quality, clean and efficient.
• Cost saving and problem solving.
• Suitable for all materials which can be friction drilled.
• Precise formation of the thread within the bush.