Belt hitting way tube

[dusty]

What I wish I had was clarification of where a plumb bob dropped off the rear edge of the idler sheave would be with respect to the inside circumference of the upper, rear way tube.

I didn't use a plumb bob. My measurement is perpendicular to the tops of the way tubes rather than to the center of mass of the earth. (Consistent with other measurements I've provided in this thread.) 2.3845"

Measurements on my machine aren't going to tell us why the OPs machine had zero or negative clearance between belt and way tube at TS speed. My machine has about 3/32" clearance at "R" (nominally 3500 RPM) on the speed dial.

- David

??? 2.3845 ???

[DLB]

Sorry. That is 2.3845" from the rear edge of the Idler Shaft to the forward edge of the rear way tube. I see now that you said sheave, not shaft. If you specifically need the sheave we'll have to correct. I believe the Idler Sheave diameter I measured the other day was 5.488" diameter, but that's kind of a weird number so let me know if you measured something else.

- David

[dusty]

After all of the chit chat...do we know why the drive belt contacts the way tube on the OPs Mark V?


The last image posted by the OP shows the motor to be way off center. Maybe he needs to examine the motor mount and/or the motor pan.

[dusty]

Where Is the Idler Shaft.jpg (185.61 KiB) Viewed 3181 times