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Discussion Starter · #1 ·
What speed (RPM) does the snow blower run. Does it run straight off the motor or reduced down? I plan on putting a 620 blower on my 1450 tractor with some work. Has anyone done this before? Thanks, Campy
 

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Tractorholic
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The 620 snow blower runs directly off the crank.I believe the belt pully on the blower is bigger which would make blower turn slower than motor.also has 2 gears driven by a chain to drive auger.Not sure how many rpm they are putting out.
 

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Discussion Starter · #3 ·
I was wondering if that was how it was set-up. If it does run off the crank the blower is going to run some serious RPM. The pulley on the blower is close to a 1:1 ratio when I turn it over by hand. That would have the blower running close to 3,000 RPM which seems really fast to me. Any one have one of these units that they use? Do they really spin that fast? Campy
 

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Collector of Rusty Junk
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I figured the speed on my Cub Snowblower to be about 1200 rpm at full throttle.
 

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On the later model 620's, the final drive sprocket has 35 teeth and the driver, 13. The driven pulley is about twice the diamter of the mule drive (rough estimate without measuring). On that basis, you have a reduction of about 5.4:1, which would give an auger speed of about 560 rpm at an engine speed of 3000 rpm. Roughly 10 revs per sec.
 
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