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09-04-2007, 04:43 PM | #1 |
Rock Crawler Join Date: Feb 2006 Location: Easthampton
Posts: 747
| Need help to find a pulley diameter.
I'm reworking our back up air compressor, and I'm having a hell of a time figuring out what size pulley I need on the motor. The Pump has a 13" flywheel, and needs to turn 1200 RPM, the motor is 1720 RPM. I can't for the life of me figure out what size the pulley on the motor should be. We had it direct drive before, but the 3 HP capacitor start motor did a number on the pump, so I don't want to wreck it again after just rebuilding it. Any help? |
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09-04-2007, 04:54 PM | #2 |
Quarry Creeper Join Date: Jun 2007 Location: Torrance, CA.
Posts: 282
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Someone confirm this. 1200/1720= 0.69767 0.69767*13"= about 9" (9.069) mcmaster may have the 9" pulley you need. |
09-04-2007, 04:59 PM | #3 |
Rock Crawler Join Date: Feb 2006 Location: Easthampton
Posts: 747
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ok thats what I came out with. I did 70%(1700/1200) *13 and came out with 9.1 so I was right.
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09-04-2007, 05:02 PM | #4 |
Quarry Creeper Join Date: Jun 2007 Location: Torrance, CA.
Posts: 282
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A 9.1" will spin the pump slightly faster. A neglegible amount probably.
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09-04-2007, 05:14 PM | #5 |
Rock Crawler Join Date: Feb 2006 Location: Easthampton
Posts: 747
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I'll just get a 9" pulley,
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