I think I see where you are going with this. The bars are reversible.
SB actually only makes an aftermarket cylinder and impeller. The cylinder does not seem to cause any more/less bearing issues. The impeller, for some reason, I have heard, will eventually take out the right bearing. Fortunately, this bearing is super easy to change. Sure enough, mine went out, maybe less than two years of the SB impeller install. But it also has several hours on it so who knows.Looks like there is no need for a left/right side cylinder. Just change the direction of the rasp bars to make it a left or right side.
On a side note.... Would rotor bearings longevity be an issue with the heavier SB rotors?
Sunnybrook Rasp Bars have a hollow space underneath??The forces applied to the cylinder when threshing are greater than the weight difference plus the large and type of bearings as SC pointed out plus they are on the auto greaser make the additional weight no factor to bearing life.
I‘m really disappointed none of you farmer/engineer/physics experts have not picked out the key difference between the cylinders and the effect that has.
So.... View attachment 160642
View attachment 160643
One more chance!
I have a sunnybrook conversion machine running against 5 OEM’s and it has not made a single lap on any of the other ones. Ever.Over here I don't know a single farmer using aftermarket/retrofitting parts...
10 years ago some people used different sieves, but never cylinders or concaves.
Either we don't know the advantages, or we trust the original manufacturers that they find the best solution after years and Millions of R&D Budget...
Sometimes it seems canadians first thought with a new machine is: "What could I possibly replace first...?"
Sunnybrook cylinder looks like it might be smaller diameter tube with the rasp bars sticking out further. Would allow more room for material to get through.
I finally have my two gold star award winners, congratulations!The SB bar and stand is more straight (like your ZAPS) to grab and feed more aggressively.