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General Skidsteer & Technical Topics
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Home made auger for low-flow hydraulics small skidsteer
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<blockquote data-quote="vinito" data-source="post: 90160" data-attributes="member: 12954"><p>There's a tag on the motor so I googled for some specs and found: CI/rev = 17.9, minimum starting torque = 2,500 Lb-in continuous & 3,430 Lb-in intermittent, flow = 15gpm cont. & 20gpm int., and then some mechanical specs. for mounting and such.</p><p><a href="http://smg.photobucket.com/user/mikeyphoto/media/Tag%201.jpg.html" target="_blank"><img src="http://img.photobucket.com/albums/v110/mikeyphoto/Tag%201.jpg" alt=" photo Tag 1.jpg" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>I found a simple formula for figuring RPM and it gives <strong><em>231 x GPM / motor displacement </em></strong>which with a 7.2GPM pump comes to 92.9 rpm at maximum possible flow. I figure it might normally be 60% of that considering age of pump and likelihood of engine throttle being set at 3/4 as a comfortable norm (just a W.A.G., but seems plausible). So that means auger RPM will be around 55 <em>if</em> this is correct. So that's abour right for an auger isn't it?</p><p>Do you guys think direct drive of this motor will have the torque to do a decent job? Seems like I might have lucked into a pretty decent working window if it's got enough poop to do the job maybe. Am I on the right track?</p><p>The gear reducer is close to a 3:1 ratio which would be more torquey, but is that kind of slow for an auger? (between 18 RPM chugging along and 31 RPM at full throttle and luck). I dunno - maybe that's really about right. What do you's guys think? Would I be happier springing for the $170 gear reducer? I've never run an auger before so I could benefit from some experience.</p><p>Thanks.</p></blockquote><p></p>
[QUOTE="vinito, post: 90160, member: 12954"] There's a tag on the motor so I googled for some specs and found: CI/rev = 17.9, minimum starting torque = 2,500 Lb-in continuous & 3,430 Lb-in intermittent, flow = 15gpm cont. & 20gpm int., and then some mechanical specs. for mounting and such. [URL='http://smg.photobucket.com/user/mikeyphoto/media/Tag%201.jpg.html'][IMG alt=" photo Tag 1.jpg"]http://img.photobucket.com/albums/v110/mikeyphoto/Tag%201.jpg[/IMG][/URL] I found a simple formula for figuring RPM and it gives [B][I]231 x GPM / motor displacement [/I][/B]which with a 7.2GPM pump comes to 92.9 rpm at maximum possible flow. I figure it might normally be 60% of that considering age of pump and likelihood of engine throttle being set at 3/4 as a comfortable norm (just a W.A.G., but seems plausible). So that means auger RPM will be around 55 [I]if[/I] this is correct. So that's abour right for an auger isn't it? Do you guys think direct drive of this motor will have the torque to do a decent job? Seems like I might have lucked into a pretty decent working window if it's got enough poop to do the job maybe. Am I on the right track? The gear reducer is close to a 3:1 ratio which would be more torquey, but is that kind of slow for an auger? (between 18 RPM chugging along and 31 RPM at full throttle and luck). I dunno - maybe that's really about right. What do you's guys think? Would I be happier springing for the $170 gear reducer? I've never run an auger before so I could benefit from some experience. Thanks. [/QUOTE]
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Home made auger for low-flow hydraulics small skidsteer
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