Troubleshooting Guide | Breaking Taps


Taps are dull

Solution: Re-sharpen taps or replace with new taps


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Material too hard

Solution: Switch to a tap for harder materials


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Incorrect lubrication

Solution: Consult Lube specialist for proper cutting oils


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Improper Alignment of tap and drilled holes

Solution: Check accuracy of axis in machinery


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Minor diameter too small

Solution: Select proper size from Spiralock Drill Chart


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Not enough chip clearance

Solution: Clean out chips before tapping or drill minor diameter deeper to provide more area for chips


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Tap not cutting freely

Solution: Modify feeds to improve cutting ability of taps


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Tap bottoming in blind holes

Solution: Clean out chips before tapping or drill minor diameter deeper to provide more area for chips


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Loose or poor fixturing of part

Solution: Check that part is fixtured correctly and movement of part does not occur during tapping operation


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Lubrication does not start ahead of tap or reach end of tap

Solution: Increase amount of coolant, direct coolant to end of tap


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Not enough thread relief

Solution: Switch to style of tap with greater thread relief

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