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Discussion Starter #1
Got a 9770 with 600 series flex. How fast can I cut and do a decent job?
Salesman says 5-6 mph should be no problem and to increase backshaft speed.
I thought backshaft must be at 510-530 max. What do others run at for backshaft and
how fast cutting?
 

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520 is max recommended speed for backshaft
if you start getting above that, you can overspeed the knife and cause a major vibration

depending on stalk conditions, it will cut at those speeds
 
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