Quote:
Originally Posted by Chris in CT
And...no jokes about male and female tapers, please!
Chris
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Funny. You google "lubricate tapers" and you get several web pages on "earcandling."
We mess with machines, they do strange hot things to their ear canals?
As I said, I wouldn't necessarily buy into the Practical Machinist Forum argument and your overview a cogent look.
Confirmed by
https://books.google.com/books?id=F9...0taper&f=false which states "don't oil the taper shank of the centers, spindle-adaptor sleeves, and drill-chuck shanks, as a film of oil prevents them from seating properly."
Notice the wording. "A film of oil." I still like the thought of a quick wipe and wipe off with a light oil - if for no other reason than to remove perspiration and the oil from one's skin that one might otherwise leave on the taper.
And in defense of a little lube, there might be something to establishing that "stretch" of the hub radially we discussed earlier, a necessary part of "putting on" a hub. One can't establish a pressure psi without stretching the hub below it's yield point, or possibly above. One imagines that without ANY lubrication that pressure would be highest just under the nut, and in decreasing levels of psi as one approaches the axle full diameter.
This phenomenon reason that a post-driving recommendation is made to "touch up" the hub nut torque. One imagines that the rolling action tends to "even out" pressure across the taper and in doing so, relieves some of the tension under the nut. Tension that is restored in the re-torque.
And a lubricant may help this "evening out" to occur faster? And more positively to it's final tension/pressure?
MANY ways to look at this.
One has to be careful in use of the Internet as a reference source. Just about ANYTHING has been said given enough time and discussion.
Sort of like the mind-exercise considering monkeys randomly typing at a keyboard: eventually, given enough time, they will type ALL known documents?
Including the incorrect ones?
Joe K