Combines Accelerator RollsIJ

Rubber faced,large gear looking, timed as to not damage the grain. They run under the rotor at a high speed to increase the speed of the grain away from the rotor and down to the grain pan while going through the high velocity air blast to clean the grain above the chaffer area. As they wear out they become less effective of grabbing the grain away from the rotor and can cause loss out the back or in rare occasions partial to total plugging under the rotor of grain. Or if the belt that drives them breaks, same problem and the SHOP VAC is a wonderful tool. By the time the monitor goes off and the machine is shut down the belly of the rotor is full.

The accelerator rolls throw grain through a heavy air blast from the upper fan duct at 4 times the speed of gravity, if I remember right. They are the best thing for grain cleaning ever designed into combines in my opinion. I can still remember sticking my head (carefully!) into the windstream of the R40 we had after our M3 - the fan choke was set up at reccomended setting for oats. The wind took my breath away - and I NEVER thought a single oat would stay in that combine! The idea is that the heavier grain is thrown through the air blast while lighter chaff, etc is blown out the back before it gets to the shoe. The same theory as your M2's upper air duct only with a huge dose of testosterone and steroids. I have a video around here somewhere that I took of the M3 cutting oats. The chaff floated nicely out of the shoe while these rotaries look like a storm of chaff. The chaffer in our R52 is actually smaller than the M3 chaffer but there is no comparison in capacity! Most of the cleaning is done prior to grain getting to the chaffer. I'll post a link below to a pic I took of some wore out accelerator roll lugs we took out of our machine this past summer to give you some idea of what they look like. Imagine them bolted to two shafts close together - the rubber lugs intermeshing. Take care- Tom langan

And below is a link to our R52 in action cutting oats. The pic ain't real big, but you can kinda see the chaff storm from the shoe. What's really impressive is to see the chaff from an R72 taking 30' of wheat! Never seen it in person but have seen pictures.

Thanks for the pics and the explanation, I'd like to one day get an N-R series machine and this information will come in handy. Thanks again, Curt

Abilene Machine supplies aftermarket accelerator rolls. look really good.