T
Thomas Hood
Guest
Dear All,
I am about to build a set of wheels and it occurs to me that a
molybdenum disulfide based lube (rather than 30w engine oil) on the
threads might reduce the problem of spoke wind-up greatly.
Is it fair to extrapolate from here:
http://www.arp-bolts.com/Catalog/Catalog.PDF/ARPCatalog_0024.pdf
Thread size, Torque w/ 30W motor oil, with moly, (my calculated % less
torque for moly)
5/16Ë stud 25 20 -25.00%
3/8Ë stud 45 35 -28.57%
7/16Ë stud 71 56 -26.79%
1/2Ë stud 108 84 -28.57%
9/16Ë stud 156 122 -27.87%
5/8Ë stud 214 167 -28.14%
....that if I coated the threads with moly that spoke wind-up would not
occur until spoke tension was significantly higher?
http://www.arrowprecision.co.uk/details.php?id=62774
....would doubtless do a half-dozen wheel, and is only a couple of
quid.
I think this could be empirically assessed but would require a
tensiometer, and two sets of spokes/ nipples (I suggest the friction
in the threads might differ after bringing to tension once and bedding
the threads)
Any thoughts?
Thomas Hood
I am about to build a set of wheels and it occurs to me that a
molybdenum disulfide based lube (rather than 30w engine oil) on the
threads might reduce the problem of spoke wind-up greatly.
Is it fair to extrapolate from here:
http://www.arp-bolts.com/Catalog/Catalog.PDF/ARPCatalog_0024.pdf
Thread size, Torque w/ 30W motor oil, with moly, (my calculated % less
torque for moly)
5/16Ë stud 25 20 -25.00%
3/8Ë stud 45 35 -28.57%
7/16Ë stud 71 56 -26.79%
1/2Ë stud 108 84 -28.57%
9/16Ë stud 156 122 -27.87%
5/8Ë stud 214 167 -28.14%
....that if I coated the threads with moly that spoke wind-up would not
occur until spoke tension was significantly higher?
http://www.arrowprecision.co.uk/details.php?id=62774
....would doubtless do a half-dozen wheel, and is only a couple of
quid.
I think this could be empirically assessed but would require a
tensiometer, and two sets of spokes/ nipples (I suggest the friction
in the threads might differ after bringing to tension once and bedding
the threads)
Any thoughts?
Thomas Hood