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Tapping Al is a breese, haven't done that much but tapped spindles on my lawn mower for grease zert using cordless drill in 30 seconds. Little forward, little back, little forward, little back. I just picked a bit that looked smaller than the root diameter didn't have a machinery handbook at home, probalby not the right bit either.
8-32 is 0.164, drill size should use is 29 or 0.1360.
I have a hard time seeing the nylocks getting that hot out there spining in the wind. Source I found said good to 121C so 250F.
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