Clutch Tech!! Clutch Makers, add some valuable info!!

[Diesel Freak]

oh boy, classical physics sure helps figure things out!!



Found some interesting friction material (prolly nothing new to the clutch people)



http://www.tribco.com/drycluch.html



so, I want a single disc ETH clutch to engage smoothly, have little to no maintenance, and hold 1500 foot pounds at the flywheel.



Torque = force x moment arm



Force = Normal force x u



u = either static or dynamic coefficients of friction... . using the dynamic (kinetic) coefficient would be a good suggestion.



Torque = Normal force x u x moment arm



The average radius of a 2001 ETH clutch is 0. 514 feet



I want 1500 foot pounds



1500 = Normal force x u x . 514 feet



2919 LBF = Normal force x u(k)



u(k) = 0. 36



8108 lbf = Normal force... now we can divide this by "2" cuz there are two sides to the friction disc.



4054 lbf... .

or



if I used the Static coefficient of friction u(s) = 1. 05 the final force = 1390 lbf



Hopefully someone else will assist in how this translated to pressure plate load.

 

[Diesel Freak]

Found on another thread some info on Feramic frictions.



Feramic friction coefficient is . 7

Cerametallic friction coefficient is . 75



I am assuming that this is Kinetic (dynamic friction)

 

[South Bend Clutch]

Found on another thread some info on Feramic frictions.



Feramic friction coefficient is . 7

Cerametallic friction coefficient is . 75



I am assuming that this is Kinetic (dynamic friction)

Actually, the charts I have show these #'s in reverse but it is heat that becomes a factor. How do they break down or react to higher temperatures.

Feramic will out perform the cerametallic in extreme conditions.



Peter

 

[South Bend Clutch]

oh boy, classical physics sure helps figure things out!!



Found some interesting friction material (prolly nothing new to the clutch people)



http://www.tribco.com/drycluch.html



so, I want a single disc ETH clutch to engage smoothly, have little to no maintenance, and hold 1500 foot pounds at the flywheel.



Torque = force x moment arm



Force = Normal force x u



u = either static or dynamic coefficients of friction... . using the dynamic (kinetic) coefficient would be a good suggestion.



Torque = Normal force x u x moment arm



The average radius of a 2001 ETH clutch is 0. 514 feet



I want 1500 foot pounds



1500 = Normal force x u x . 514 feet



2919 LBF = Normal force x u(k)



u(k) = 0. 36



8108 lbf = Normal force... now we can divide this by "2" cuz there are two sides to the friction disc.



4054 lbf... .

or



if I used the Static coefficient of friction u(s) = 1. 05 the final force = 1390 lbf



Hopefully someone else will assist in how this translated to pressure plate load.

We use Tribco's Kevlar product in many applications. It is a fantastic friction product. However, plate load increase is a must when used for performance. We use it mainly for agricultural, industrial, semi and passenger cars as well as gasser tow trucks. With the type of torque that these diesel pickups can produce, we found Kevlar needed to much plate load to get it to hold adequately thus searching for a higher holding friction material. Metallic was out of the question for us which brought us to the feramic.



Peter

 

[Hohn]

Peter, my Con FE is being installed as I type this.

I hope the local guys can get the flywheel prep right. I'm also installing Dan's TK75 pilot bearing, so the flywheel has to be modded.

Justin