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H1

About Spiral Fultes on the Tap

【英】困ったときの知恵袋詳細
Cutting Taps Metric Threads How to use
Even though I ordered coated spiral pointed taps to tap through holes, a distributor told me, "Can I offer AU+SL spiral fluted taps"? Can I use AU+SL to tap through holes?
I always thought spiral fluted taps were for blind holes.
Our AU+SL is a spiral fluted tap with a plug chamfer and is designed for through holes. A spiral fluted tap is a generic term for taps with spiral flutes. However, most spiral fluted taps are for blind hole tapping, so the general idea is that "spiral tap = blind hole use" is common. 
However, our AU+SL uses a Right Hand threads with a Left Hand spiral design which ejects the chips forward the same as spiral pointed taps. Please refer to the explanation below for more details.

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