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Thread: Extended Lugs???

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Posts: 101-110 of 124
2012-06-15 16:30:24
#101
Here is the info for non-metric hardware. The graph says it all. It is significant.
http://www.spaenaur.com/pdf/sectionD/D48.pdf

Simple Machines/Mechanical Advantage 101 right there.


See Notes 1 and 2. Torque = KDP, but P (clamp load) is dependent upon "Tensile stress area". "Tensile Stress Area" depends upon pitch.

Tensile Stress Area = (Pi/4)(d-(0.9743/n)^2)
(where n=threads/inch)
Last edited by BenFenner on 2012-06-15 at 16-37-07.
2012-06-15 17:09:05
#102
Originally Posted by BenFenner
Those switching to 1.5 thread pitch on the wheel studs, have you figured out how much the torque spec should rise to get the same clamping load and changed your torque regiment accordingly?


I torque mine to 90 (ish) ft lbs.
2012-06-15 17:50:00
#103
Originally Posted by BenFenner
Here is the info for non-metric hardware.
I don't think the general population refers to an engineering website when torquing their lug nuts. Don't most manufacturers recommend basically the same torque specs? I own a few different brands of cars, and more than likely they don't all have the same pitch studs, and I just torque everything in the 80-90 ft/lb range, and haven't lost a wheel yet.

C
2012-06-15 17:53:38
#104
I refer to engineering websites when choosing number of twists on the twist tie for my bread bag.
2012-06-15 17:54:43
#105
Your girlfriend either has the patience of a saint, or just ignores your weirdness.

C
2012-06-15 17:57:11
#106
And Cliff made fun of me because I brought a torque wrench labeled "Wheels only" to the convention.
2012-06-15 18:13:15
#107
Originally Posted by Chriscar
That's a mod we recently installed. Down with necroposting!!!

C


- Great feature.

Originally Posted by BenFenner
I refer to engineering websites when choosing number of twists on the twist tie for my bread bag.




Originally Posted by Chriscar
Your girlfriend either has the patience of a saint, or just ignores your weirdness.

C


- Lol.
2012-06-15 18:15:27
#108
Originally Posted by BenFenner
I refer to engineering websites when choosing number of twists on the twist tie for my bread bag.


3 seems to be standard...the wonderful knowledge you gain working at a bread factory lol
2012-06-15 19:06:19
#109
Originally Posted by BenFenner
Here is the info for non-metric hardware. The graph says it all. It is significant.
http://www.spaenaur.com/pdf/sectionD/D48.pdf

Simple Machines/Mechanical Advantage 101 right there.


Bolt Torque Calculator - Engineers Edge Engineering Calculators

This calculator seems to imply that clamping force can be determined by only using two variables, that being torque and diameter of the fastner. Most charts and calculators seem to follow this same pattern.

What I'm seeing from the data in the chart you posted is that finer thread pitches will have a higher maximum clamping force, which I don't disagree with at all. But the graph doesn't show any different clamping force for same-diameter bolts with different thread pitches, just different diameters.

Now, I'm not arguing that it does, at an absolute level, exist as a factor, but what I'm reading seems to indicate that it falls into the noise of friction variation and certainly, in the case of lugnuts, the real world variation of even a calibrated torque wrench. In other words, you might find it an interesting exercise to figure out the difference, but it's not going to have a practical difference in how you tighten the wheel up.

Here's one for you though. Do you torque your wheels with the tire on the ground or in the air? If you do it on the ground, you're seeing variable forces from the weight of the vehicle acting unevenly on the studs. If you, for instance, tighten a lug nut to 80 lb/ft with the vehicle on the ground (use the lowest nut), and then jack the car up and hold the wheel in place (do this with a rear wheel with the handbrake), you can see a noticable additional rotation before the wrench clicks.

I've worked with racing teams that required all torqueing of wheels be done with the wheel off the ground. I've worked with others that just hit it with an impact until it "sounded right" too
2012-06-15 19:15:44
#110
Originally Posted by P10FTW
You can studs for a Nissan Titan, they are about 8mm longer and fit. For a $1 each, can't beat that.

I would also guess that any Titan studs would have to be stronger, or certainly as strong, as a Sentra stud.

I googled it just for Chriscar, a Titan weighs 5,038 pounds. Our cars weigh approximately 2,500'ish. Gotta be stronger OEM studs on a Titan.

That is a very appealing hoe-e-m option.

EDIT: That is also discussed in this thread, as posted on the first page.http://www.sr20-forum.com/sentra-se-r/41756-extended-wheel-studs.html

Originally Posted by Loki0013
While rotating my tires I noticed that a couple of my wheel studs were getting a little warped. So after a lot of digging around at Autozone and a lot of measuring with a micrometer, I found a set of wheel studs that will fit the B13 without having to drop the extra coin for Nismo Studs.

Dorman Part number 610-404.1 they are designed to fit ARMADA 2008-05, FRONTIER 2008-05, PATHFINDER 2008-05, QUEST 1998-93, QX56 2008-04, TITAN 2008-04, VILLAGER 2002-93, XTERRA 2008-05. They are not quite the 60mm that the Nismo Studs are (they are 46mm), but should work easily for those with wheel spacers. I have spacers on my rear wheels, and these are working just fine, and wanted to share the info.


Originally Posted by Chriscar
Your girlfriend either has the patience of a saint, or just ignores your weirdness.

C

I'm going with both.

Originally Posted by wnwright
And Cliff made fun of me because I brought a torque wrench labeled "Wheels only" to the convention.

Speaking of wheel studs, lug nuts....and how to put them on?

Can I divert us to who makes a quality, solid, reliable torque wrench for all this hardware we are discussing? Preferably good bang for the buck, with a no-nonsense warranty. Lowes Kobalt? Sears Craftsman? Other?
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