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2024-06-10

Here is the English explanation of which thread depths or hole types are suitable for spiral flute taps:

Spiral flute taps are highly recommended for blind holes
The spiral flutes direct chips back out of the hole, preventing clogging at the bottom
Especially effective for deep blind holes (typically deeper than 2× the diameter)

Ideal for thread depths greater than 1.5 times the diameter
(e.g., for M8, thread length ≥12mm)
The spiral angle (e.g., 35°, 40°, 45°) ensures smooth chip evacuation, reducing breakage risk

Such as aluminum, brass, copper, low carbon steel
These materials produce long, continuous chips — spiral flute taps efficiently evacuate chips upward, improving surface finish and preventing chip jamming

Through Holes: Spiral flute taps are not ideal, as chips need to be pushed forward — better to use spiral point taps or straight flute taps
Brittle Materials (e.g., Cast Iron): These materials produce short chips, so straight flute taps are preferred for stability

Jiangsu Xingrui Tools CO.,LTD

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FeiDa indutrial Park,Hou Xiang Town,DanYang City,Jiang Su Province,China.

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