[Sundowner]

saw this in Petersens.
bite me if it's a repost, I searched.
I'd like to know if Steve Gershner and Jess have looked into this.
LT1YJ has to know something about this thing.

http://www.drivetechnologies.com/

 

[morpheus]

if you look back at the pics from the SEMA show this was on display there. it was discussed briefly here.

- jack

 

[T1H5_TA3]

yha, some one finaly took puting birfields on the drive shaft to the next level.

2 birfs back to back w/ 45degree operating angle.

kinda been a back yard thing for a few years, now some ones marketing them

 

[Sundowner]

these guys are saying 90* at 1100 ft-lbs of torque capacity.

 

[T1H5_TA3]

well, 2 joints with a working angle of 45* back to back is 90*
1100ft/lbs realy isnt that much when you think about reduction...

 

[GOAT1]

They are called Cornay Joints, and there's is alot more to them than you think, they have been around for a few years in mining eqiupment and marine drives, they did some developement with the front axles on Big Mac in the late 90's, I think they are getting them figured out and we will see more of them in the near future. They work killer for independant suspension axle joint and in driveshafts.

 

[Sundowner]

sorry if I forgot about you GOAT1, haven't seen you post in a while.

you use these things yet on any of your rigs?

 

[CrazyHorse]

these guys are saying 90* at 1100 ft-lbs of torque capacity.

read it again, all the torque ratings are in INCH POUNDS!!! that isn't much of a torque rating at all...

 

[CrazyHorse]

read it again, all the torque ratings are in INCH POUNDS!!! that isn't much of a torque rating at all...

oops, found it, you were looking at the pto joints, okay...

 

[T1H5_TA3]

lol.. my rideing lawn mower makes more than 1100 in/lbs torque.. :flipoff2:

 

[T1H5_TA3]

heres the specs on the automotive cv...
operating torque:300 ft/lbs
max torque:2200 ft/lbs
operating rpm:2000 rpm
max rpm:5000 rpm
max angle: 30degrees

30 degrees out of a cv, and an operating torque of only 300 ft/lbs.. not much other than alot of hype!

 

[Sundowner]

30 degrees out of a cv, and an operating torque of only 300 ft/lbs.. not much other than alot of hype!

which is far more than adequate for 99.95% of automotive applications out there.

I'm sure they have or can make something more suited to our needs.

 

[GOAT1]

which is far more than adequate for 99.95% of automotive applications out there.

I'm sure they have or can make something more suited to our needs.

Yeah, what he said. My only experience with them is on the macpherson trophy truck, they used them when they built the truck in '96 or something, they used them for the axles on the IFS, it had 37" tires, 750 hp and about 25" of wheel travel. A friend of mine did alot of developement on them, but I cant get much info out of him, he got to be hush-hush about alot of the stuff he does. There are some good shots of them on the TLC extreme machines four-wheel drive show they had a few years ago

 

[onetoncv]

i talked to these guys- interesting idea- Jess

 

[steve gerstner]

Thanks sundowner, this is a great set up, i will call them tomorrow, i have been using convell C.V.'s for two years.I will ask about a main drive shaft for my truck. steve

 

[Kicker]

I will help you guys out with some info.

The joint still has the same "downfalls" of a typical double cardan. But as their webiste shows, it does have some "new" technology.

And about the Macpherson shaft. That was a one off custom pair that was made completely from 300M.

It does have a lot of promise, but Cornay is still trying to get a big order for larger sizes to bring the production costs down. They have the small ones on the Hummer, but none of the big ones are in much circulation.

I used to work for a company who was trying to promote this product, but it never took off for us either. I do however think it will take off in a few years(or less) now that off roaders know about it. Would be great for SWB Jeeps in the rear.

And there are a couple sizes they have made that are roughly 1410 size. I think they have a 1350 or 1330 size as well. But again, not in production.

And they can handle propshaft speeds. So you guys don't have to worry about that. I think between 5 and 6k RPMS depending on version.

I hope this helps clear up some confusion.

The website basically shows what they have done. Not what they can do.

Steve

 

[NoJoke]

I will help you guys out with some info.

The joint still has the same "downfalls" of a typical double cardan.

What are the "downfalls" of a double cardan?