S690 combine Variable stream vs bullet rotor

[canfarmer]

Ours are coming with the variable stream which is recommended for tougher and or high volume straw conditions in small grains. I am hoping to be able to advance the veins in canola (especially when it gets very dry) and get the straw through quicker to lessen shoe load. Time will tell.

[JD7810]

Originally Posted by bud

I think you have it all wrong. If you want to bale the straw Deere recommends the variable stream rotor because it puts out much longer straw to bale. If it was being pulverized more that would make it worse, not better.

The longer more gentle nose on the rotor causes less pulverizing and possibly poorer threshing than the tri stream rotor.

I think in 2 years the variable stream rotor will be the only rotor sold in the S series for small grain. Was told the tri stream rotor is only available because it is better in corn.

Howdy

Just sharing my experience with the two different rotors side by side in very easy threshing conditions with light straw levels in barley. There was a S670 with a bullet rotor reaping as much as a S680 in same paddock 40degree day. S680 would throw too much over if pushed any harder because the rotor was smashing everything to bits and flooding the sieves. Still had plenty of power. Deere tech from states following the machines around said the variable stream was the completly wrong rotor for conditions and crop we were.

All new S-Series machines over here have been ordered with bullet rotor to reap small grains in easy-medium threshing conditions.

I believe that in tough straw conditions in small grains that variable stream will do a better job with better straw quality.

Im only putting out there what I have seen, not telling anyone what rotor they should have.
Cheers

[joe green]

Originally Posted by JD7810

Howdy

Just sharing my experience with the two different rotors side by side in very easy threshing conditions with light straw levels in barley. There was a S670 with a bullet rotor reaping as much as a S680 in same paddock 40degree day. S680 would throw too much over if pushed any harder because the rotor was smashing everything to bits and flooding the sieves. Still had plenty of power. Deere tech from states following the machines around said the variable stream was the completly wrong rotor for conditions and crop we were.

All new S-Series machines over here have been ordered with bullet rotor to reap small grains in easy-medium threshing conditions.

I believe that in tough straw conditions in small grains that variable stream will do a better job with better straw quality.

Im only putting out there what I have seen, not telling anyone what rotor they should have.
Cheers

That is very interesting because i have been told in dry straw conditions you can send the straw through faster and it suppose to put less fines onto the sives.

[SE Sask Farmer]

When we ordered new combines, Deere combine specialist told us the variable stream rotor will be better in canola worse in durum.

[Don Boles]

Originally Posted by SE Sask Farmer

When we ordered new combines, Deere combine specialist told us the variable stream rotor will be better in canola worse in durum.

No big deal, just double the order!

[canfarmer]

I will be anxious to hear the reports when these machines start rolling in the Texas wheat. When does the texas harvest start, May?

[farmerjones]

I doubt you will see many Variable Stream rotors in Texas. Since almost all of their wheat is done by custom harvesters they are going to be ordering the standard rotors. Most of these harvesters will be combining corn in the fall, so they have to have the standard rotor. Plus for resale purposes they will be much more attractive to the largest number of buyers with the standard rotor. That's the frustrating part....a very large percentage of machine will have to do corn, so that means we get the same old rotor. Variable Stream was designed specifically for Europe and Canada, not average-yeilding, spindly Texas straw.

[8850jd]

f deere would just makr the threshing section longer, you could make the crop do less rotations before you kicked it out the back. The vanes being able to be adjusted is actually having negative effects. This makes them think they can allow the crop to stay in the machine longer to correct the problems they are having in the threshing area. The grain should all be out in the first foot of the rotor(past the screw). If not there there is a high unlikelyhood that the grain is going to make the bin. The variable stream is a nice sales pitch for a problem which they are refusing to address... My two cents...G

[lexionman575]

Didn't Case-IH try variable rotor vanes?

[8850jd]

Originally Posted by lexionman575

Didn't Case-IH try variable rotor vanes?

I dont know if its adjuatable from the cab, but you can adjust the vanes manuelly. It is handy but the new series has shorter vanes the the old 88 series so you cant restrict the flow enough for high volume straw to do a good job seperating.
Case ih needs to open the top of the rotor cage like deere does with the oval shape which allows the crop mat to disengage from the rotor to help with the seperation, or disruptor inserts would be needed.
Massey ferguson still does it the best by just having a longer rotor. Would like the 160 plus inch rotor back...