Tethers being tested (1 Viewer)
- Thread starter The Counterfeiter
- Start date
Machine the axle hubs and the wheel hubs so they interlock, the studs then do the clamping and not the driving.
Mike, isn't that what IndyCars do?
Randy
Nitro Member
I'm sorry. This is about the most idiotic post of the year. Where did you get your engineering degree from? I better stop here.
I've got to go. My all aluminum 53' T&E trailer needs a wash and wax.
.
Bross Hawg
Nitro Member
Obviouly you are not a truck driver, are you? I would say most truckers are concerned with weight...the less your truck/trailer weighs, the more cargo you can haul...and the more money you make each trip...
Randy
Nitro Member
Rich:
Simple job for you. An engineering demonstration you might be able to grasp.
Get a 6 foot length of 2X12 wood. Go nail it to your fence post with 5 nails in a 5.5" center at the center of the board. Now grab an end of it and pull it back and forth. See how easy it is to pull it away from the post when it's supported by such a tight bunch of nails. Now rotate it, rip it off the post and see how easy it was.
Now get another 6' long piece of 2X12 and nail it with 5 nails with a 10" center to a big enough post to accept it. Grab and end and pull it toward you. Notice how much stronger the board is held to the post? Now try to rotate it to rip it off. Get back to me when you figure out which was stronger. Do the same and add an extra nail or two and tell me how that works for you.
Another little point to ponder. You pal says lubricating the threads increases tensile strength. Your friend fails to explain or realize what is happening. By lubricating the threads your are reducing the friction when torquing the bold/stud. The stud stretches as it's torqued giving it a clamping force. Lubrication eliminates friction losses that can result in a false torque reading which will mean the bolt/stud has not stretched to the required spec minimum. Like an L19 rod bolt torqued with lubricant to 100 pounds. The properly installed bolt stretches .006" to .0065". It gives the bolt a clamp force of approximately 20,000+/- pounds (off the top of my head, actual number may be HIGHER). But in the case of a wheel stud, no amount of lubricant or torque is going to strengthen the bolt/stud against lateral (rotating) forces. When the force becomes anything but parallel to the bolt a shear can result. Increasing the bolt circle strengthens the assembly as you found out in the 2X12 field test you did because you have reduced the leverage you placed on the nails.
I also agree that a splined hub would be a good place to start. It would work toward eliminating a twist shear event. Right now it's controlled only by the lateral strength of the studs in a tight centerline.
I also want to say this. If increasing the diameter (bolt circle) weakens the assembly, why is it that larger 10.5 and 12" diameter ring gears are significantly stronger than an 8.5 or 9" ring gear? More material, yes, but the leverage from the center line of the axle is changed, too. And did you know that a major problem for the smaller diameter ring gear rear ends in high horspower applications was the shearing of the ring gear bolts (series of bolts used to hold the ring gear to the spool)? Even in my car with a 10.5" Chrisman rear end when we decide to replace the ring and pinion we will replace all the ring gear bolts with all new bolts.
Larger diameter changes the leveraged load. You know, physics.
RG
Simple job for you. An engineering demonstration you might be able to grasp.
Get a 6 foot length of 2X12 wood. Go nail it to your fence post with 5 nails in a 5.5" center at the center of the board. Now grab an end of it and pull it back and forth. See how easy it is to pull it away from the post when it's supported by such a tight bunch of nails. Now rotate it, rip it off the post and see how easy it was.
Now get another 6' long piece of 2X12 and nail it with 5 nails with a 10" center to a big enough post to accept it. Grab and end and pull it toward you. Notice how much stronger the board is held to the post? Now try to rotate it to rip it off. Get back to me when you figure out which was stronger. Do the same and add an extra nail or two and tell me how that works for you.
Another little point to ponder. You pal says lubricating the threads increases tensile strength. Your friend fails to explain or realize what is happening. By lubricating the threads your are reducing the friction when torquing the bold/stud. The stud stretches as it's torqued giving it a clamping force. Lubrication eliminates friction losses that can result in a false torque reading which will mean the bolt/stud has not stretched to the required spec minimum. Like an L19 rod bolt torqued with lubricant to 100 pounds. The properly installed bolt stretches .006" to .0065". It gives the bolt a clamp force of approximately 20,000+/- pounds (off the top of my head, actual number may be HIGHER). But in the case of a wheel stud, no amount of lubricant or torque is going to strengthen the bolt/stud against lateral (rotating) forces. When the force becomes anything but parallel to the bolt a shear can result. Increasing the bolt circle strengthens the assembly as you found out in the 2X12 field test you did because you have reduced the leverage you placed on the nails.
I also agree that a splined hub would be a good place to start. It would work toward eliminating a twist shear event. Right now it's controlled only by the lateral strength of the studs in a tight centerline.
I also want to say this. If increasing the diameter (bolt circle) weakens the assembly, why is it that larger 10.5 and 12" diameter ring gears are significantly stronger than an 8.5 or 9" ring gear? More material, yes, but the leverage from the center line of the axle is changed, too. And did you know that a major problem for the smaller diameter ring gear rear ends in high horspower applications was the shearing of the ring gear bolts (series of bolts used to hold the ring gear to the spool)? Even in my car with a 10.5" Chrisman rear end when we decide to replace the ring and pinion we will replace all the ring gear bolts with all new bolts.
Larger diameter changes the leveraged load. You know, physics.
RG
