the bearing guys can't hekp you because they just take the dimensions of the ball type and try to find an exact match in roller, and there isn't one, only some things "close"
from previous discussions here the numbers for the 1/2T TF trucks are supposed to be these:
Inner seal: National #6064
Inner bearing: 909052R MBS (Japan)
Outer bearing: 909001R MBS (Japan)
[but if you check/compare dimensions, they're slightly different]
I'm not sure if the 1/2 and 3/4 are the same, but I'd think so
Bill
