TractorByNet.com - View Single Post

Reg · 06-08-2008, 07:57 PM

Something Iron Horse said about deliberately running universals out of line to avoid some sort of "in the middle" wear pattern - not verbatim, but close enough.
Maybe 100 posts or so back ?
I know it didn't make a whole lot of sense (to ME) at the time, but with a couple of dozen tabs usually open I don't always take up each point as it comes up.
Sometimes when I'm driving these things come back to me and I wish I could just log in and reply.

and so it was today.
OK, so maybe universals wear a bit more evenly if there is a slight bend in them, but I don't think I've ever seen one that was running dead straight in the vertical dimension, so why the need to off-set them in the horizontal dimension ?

Somewhere else there was mention of the speed fluctuation through a UJ, but that might have been a different thread. Anyway, sure the SHAFT goes through that, but doesn't the UJ at the other end cancel that out and the shaft as a WHOLE act like a CV joint ? (I said "act like").

Rzeppa joints aren't just a couple of UJs back to back, those are balls in spherical races (sorta).

Just thunkin' behind the wheel today.

06-08-2008, 07:57 PM	#506 (permalink)
Reg Platinum Member Join Date: Nov 2005 Posts: 712	Re: Let's talk flail mowers Something Iron Horse said about deliberately running universals out of line to avoid some sort of "in the middle" wear pattern - not verbatim, but close enough. Maybe 100 posts or so back ? I know it didn't make a whole lot of sense (to ME) at the time, but with a couple of dozen tabs usually open I don't always take up each point as it comes up. Sometimes when I'm driving these things come back to me and I wish I could just log in and reply. and so it was today. OK, so maybe universals wear a bit more evenly if there is a slight bend in them, but I don't think I've ever seen one that was running dead straight in the vertical dimension, so why the need to off-set them in the horizontal dimension ? Somewhere else there was mention of the speed fluctuation through a UJ, but that might have been a different thread. Anyway, sure the SHAFT goes through that, but doesn't the UJ at the other end cancel that out and the shaft as a WHOLE act like a CV joint ? (I said "act like"). Rzeppa joints aren't just a couple of UJs back to back, those are balls in spherical races (sorta). Just thunkin' behind the wheel today.