Philjoe5
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- Jul 12, 2007
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I've been using a chart published by Little Machine Shop for choosing tap drill sizes. Recently I began using a new 10-32 NF tap with the recommended tap drill in steel for 50% threads, a #18 (0.1695). The tap seems to cut with too little resistance, compared to the older tap I had been using. Screws fit OK but I'm wondering if there is some other factor that might cause this tap to cut so easily. It's a plug tap BTW. Is a 50% thread in steel typical? Thanks for any advice,
Cheers,
Phil
Cheers,
Phil