Does anyone actually torque the collet nut?? I just looked it up and it’s supposed to be 18 ft-lbs. That feels like a LOT on that small of a nut.
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A google search says 15-22 ft lbs or 20 to 30 N-m so 18 ft lbs would would be right in the middle. That does not seem excessive since you tighten tire lug nuts to 100 ft lbs.
c.f.,
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Usual preface, I’m with PreciseBits so while I try to only post general information take everything I say with the understanding that I have a bias.
It depends on the the thread type and bore size.
ER11 Mini (M13x0.75)
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1-2.9mm Bore
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8Nm/6ft-lb
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16Nm/12ft-lb
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1-2.9mm Bore
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8Nm/6ft-lb
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24Nm/18ft-lb
That said these are MAX torque and with high end parts (do not use more than this or risk damage). As long as you have a good spindle, nuts, and collets you shouldn’t have an issue with less than that. You actually risk getting more runout the higher you go but pickup more slip resistance (bit spinning or pulling out of the collet).
This is from our internal data and only on a single ER16 collet with a mini nut. It’s 480 data points. The face measurement is… well the face of the collet, RMT is 1" out. This is not enough data to do more than show the pattern we’ve seen. We’ll probably put something out EVENTUALLY (when we feel we have enough data). Units are in thou (0.001"/ 0.0254mm).
Hope that’s useful. Let me know if there’s something I can help with.
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Interesting…I put a 17mm crows foot on my torque wrench, and at 18ft-lbs, it was WAY tighter than I usually do by hand. I felt like I was going to break something, so I backed off lol. This was with a 1/8" and 1/4" bit.
I’ll probably just continue tightening it as tight as I feel comfortable with using the wrenches included with the carbide kit.
Thanks for joining me on today’s ADHD rabbit hole of the moment 
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