Throwout Bearing question for the experts

[Ccmano]

Ran across this while doing my clutch recently. Take a look at the attached video I took and tell me which bearing movement is correct or doesn’t it matter. The first one is an original AC Delco I removed from my car. The two other new AC/Delco’s I have functioned identically, one of which I installed in the car. The second one is an aftermarket bearing produced in Brazil.

https://youtu.be/EJMrBs2gbe0

Your input is appreciated.
H
:cheers:

[Ccmano]

So just to clarify, on the AC/Delco units the bearing is held loosely in its framework. (for lack of a better word). This allows the entire bearing, outer race and all, the spin in the frame. All three of the Delco units I have are like this. On the aftermarket bearing the outer race is held tightly in the framework and the bearing only spins as a bearing should within itself. It almost seems like the aftermarket bearing is correct and the Delco is wrong. Is there a reason for this? Doesn’t it even matter?
H
:cheers:

[Jagdpanzer]

Noticed the same thing with the Delcos thrust bearings fitting a little loose. However, I’ve not observed any unusual noise or behavior during operation.

[Dynomite]

So just to clarify, on the AC/Delco units the bearing is held loosely in its framework. (for lack of a better word). This allows the entire bearing, outer race and all, the spin in the frame. All three of the Delco units I have are like this. On the aftermarket bearing the outer race is held tightly in the framework and the bearing only spins as a bearing should within itself. It almost seems like the aftermarket bearing is correct and the Delco is wrong. Is there a reason for this? Doesn’t it even matter?
H
:cheers:

I think both (inside and outside) Throwout bearings spin if you hold one the other is free no matter which one you hold. At least that is the way it is on three that I just checked. When you engage the clutch placing pressure on the Throwout bearing the inside bearing is working/spinning. When you release the clutch, the outside bearing is always spinning.

[Ccmano]

I think both (inside and outside) Throwout bearings spin if you hold one the other is free no matter which one you hold. At least that is the way it is on two that I just checked.

What brand are yours, Cliff? The aftermarket bearing I have does not spin in the frame at all.
H

[Dynomite]

What brand are yours, Cliff? The aftermarket bearing I have does not spin in the frame at all.
H

The standard one :D
http://www.zr1.net/forum/picture.php?albumid=399&pictureid=3643
A. When you engage the clutch placing pressure (pulling with the Clutch Fork) on the Throwout bearing the inner bearing is working/spinning.
B. When you release the clutch, the outer bearing is always spinning.
C. The inside collar is prevented from spinning by the Clutch Fork. The Outside collar is always spinning with the Pressure Plate.
D. The Clutch Disk is spinning or not depending on if it is compressed between the Pressure Plate and the Flywheel.

Throwout Bearings and Clutch Forks (http://forums.corvetteforum.com/c4-zr-1-discussion/3005470-tech-info-lt5-modifications-rebuild-tricks-500-hp-2.html#post1581480710)