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Given the ever-improving quality of taps, modern tap designs can be expected to last between 15 and 20 years typically.

My seven ways to avoid breaking a tap include:

Choosing the best hole size.

Using form taps when possible.

Thread mill critical and tough jobs.

Use purpose-made tapping lubricants.

Use the right tool holder.

Extract chips with a spiral-fluted tap.

Mind the depth on blind holes.