What's up with the Tundra?

[Blackbeauty]

This all boils down to a matter of bolt shear. It's just that simple.

For example, a 3/4" diameter Grade 8 bolt can take 40,200 lb. of shear. Multiply that by 6 (on our trucks) and you have 241,200 lb. of shear capacity on the bolts. There is a reduction required as you can't count on all of them fully engaging, but let's ignore that for a second.

Now take the larger Tundra bolts, 7/8" diameter, Grade 8, with a shear capacity of 54,700 lb. each. Multiply by 5 and you have 273,500 lb. of shear resistance.

For those of you who hope to be math scholars, you'll see the Tundra's figure is larger than our Titans by almost 12%. What does this mean? For the most part, nothing. But it allows them to run 5-lug wheels because each lug is larger in diameter and therefore can handle more shear.

Hope this explains it for you.....

[sudden urge]

The Tundra looks a lot better with the painted front end trim than that ugly chrome trim that is way out of place.

[ArmyAviation]

Originally Posted by helomech

The amount of bolts is kind of irrelevant. As long as the studs are bigger, you can use less of them and still have the same strength. Without knowing they type of material, the thickness, and lots of other variables you can't say that ours is stronger just because we have one extra stud. Even if we only had 4 studs, they would still not be the weakest link in a truck. Those 4 studs would still hold more weight than our trucks are rated for. You really should see what holds the main drive shaft on a bell 206 helicopter. It is 8 1/4 inch studs, and they hold the drive shaft in the transmission. They are holding the m/r drive shaft, head, and rotor blades to the transmission. So they are supporting all of the load of the helicopter.

and dont them that only 4 small bolts hold the the main rotor to the pillow blocks which holds the whole helicopter in the air

[helomech]

Originally Posted by ecmeyla

and dont them that only 4 small bolts hold the the main rotor to the pillow blocks which holds the whole helicopter in the air

Those bolts hold a cap on, it has been a while since I took the hub completely apart. But I think that those bolts hold in a shaft.

[NorCal 4x4]

Originally Posted by Blackbeauty

This all boils down to a matter of bolt shear. It's just that simple.

For example, a 3/4" diameter Grade 8 bolt can take 40,200 lb. of shear. Multiply that by 6 (on our trucks) and you have 241,200 lb. of shear capacity on the bolts. There is a reduction required as you can't count on all of them fully engaging, but let's ignore that for a second.

Now take the larger Tundra bolts, 7/8" diameter, Grade 8, with a shear capacity of 54,700 lb. each. Multiply by 5 and you have 273,500 lb. of shear resistance.

For those of you who hope to be math scholars, you'll see the Tundra's figure is larger than our Titans by almost 12%. What does this mean? For the most part, nothing. But it allows them to run 5-lug wheels because each lug is larger in diameter and therefore can handle more shear.

Hope this explains it for you.....

Titan's 12mm is closer to 15/32", and the Tundra 14mm is closer to 9/16" ... about 17% larger.

[TitanBlue]

It's just some bolts...Look at a GMC 3500HD, it has a 5 bolt Front. 5 More holes in the Rim for the dually mount. Doesn't fall of, even with a load!

General practice of 5 or 6 or 8 bolts, is not an engineering standard in and of itself.

[Underagedtitan]

Rather have a Titan over a Tundra anyday.

[Blackbeauty]

Originally Posted by NorCal 4x4

Titan's 12mm is closer to 15/32", and the Tundra 14mm is closer to 9/16" ... about 17% larger.

Ok, so being the follower upperer of the picker of nits , lets use the 12mm and the 14mm.....

6 x 22,674 lb. (12mm) = 136,044 (rounded up)

5 x 28,785 lb. (14mm) = 143,925 (rounded up)

So, the increase in bolt diameter does a lot more for the shear capacity than the larger quantity of smaller bolts.

And FYI, in steel capacities, whether they be tension or shear, the size differential is not dirrectly proportional to strength via direct percentage increase as would possibly be assumed. It's not a linear relationship....

And yes, even if the Turdra had (8) 1" diameter bolts, I'd still rather have a Titan.

[NorCal 4x4]

Originally Posted by Blackbeauty

Ok, so being the follower upperer of the picker of nits , lets use the 12mm and the 14mm.....

6 x 22,674 lb. (12mm) = 136,044 (rounded up)

5 x 28,785 lb. (14mm) = 143,925 (rounded up)

So, the increase in bolt diameter does a lot more for the shear capacity than the larger quantity of smaller bolts.

And FYI, in steel capacities, whether they be tension or shear, the size differential is not dirrectly proportional to strength via direct percentage increase as would possibly be assumed. It's not a linear relationship....

And yes, even if the Turdra had (8) 1" diameter bolts, I'd still rather have a Titan.

Since you were being a hope to be math scholar I thought you might want to have your nits in order.

I'll stick with a Titan too.

[gyrate]

objectively speaking, how many instances have there been in history that the bolts have snapped and the wheel fallen off?!

you have a better change of breaking the actual wheel to pieces, pushing the shock up through the hood and loosing the entire arm assembly vs snapping the bolts........

[helomech]

Originally Posted by gyrate

objectively speaking, how many instances have there been in history that the bolts have snapped and the wheel fallen off?!

you have a better change of breaking the actual wheel to pieces, pushing the shock up through the hood and loosing the entire arm assembly vs snapping the bolts........

Exactly, that is basically what I said in an earlier post.

[hooligan]

does the shear capacity of the larger bolt diameter make up for the lack of the tundra's rear end of the frame being boxed like the titan's?

and i'm gonna guess that the Ferd F1fitty's bed bolts have a larger diameter than the Tundra's too...