Removing the center point from a Spiral Fluted Tap

【英】困ったときの知恵袋詳細

Cutting Taps Metric Threads Trouble Shooting

I'm using an M6 X 1 Spiral Flute tap to produce a blind hole but the center point of the tap hits the bottom of the hole before reaching the required thread depth. I would like to remove the center point of the tap, but I'm not sure how much I can remove without damaging the tap. Can you tell me how much I can grind off the end of the tap?

Normally, an M6 or smaller tap has a convex center point. The center point of the tap can be removed by grinding. However, do not grind any portion of the cutting chamfer.

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