sak
noticing nice landscape pebbles
Member since December 2013
Posts: 88
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Post by sak on Jan 10, 2014 16:59:55 GMT -5
Hi all,
I new in this hobby and I built a tumbler, with a motor that's to small. My new requirements are that it be 110-115V / continuous duty / up to 1/8 hp / up to 1725 rpm. In my area, free-cycle is huge and I can pretty much can get any thing I need quikly (and for free). I was thinking about pulling a motor out of an appliance, (ie small room a/c, or an attic fan motor etc... )
What do you guys think would be the best appliance to get, given the motor specs that I need?
I really appreciate all your help. Can't wait to start tumbling some rocks.....
Thanks. Sak...
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,155
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Post by jamesp on Jan 10, 2014 18:13:27 GMT -5
I really like these motors. They come in 1/15 to 1/5. The best part is that they are 725-1000 RPM. So a single reduction is easier to attain. I have a 1/8 HP A/C 1000RPM 110 VAC fan motor just like this on a tumbler w/a 40 pound barrel. Was surprised it handles it. It turns a bit faster than most factory builts at 23 RPM. The speed of the barrel effects the load on the motor a lot. Fan motors are tough because the load is so constant. I get them used for $5 at the metal recycler. www.acpartsmiami.com/5KCP39KGS018S-Fan-Blower-Motor-15-HP-110-120-V-1000-RPM-CW-4-speed_p_39.html
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sak
noticing nice landscape pebbles
Member since December 2013
Posts: 88
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Post by sak on Jan 10, 2014 21:03:48 GMT -5
I really like these motors. They come in 1/15 to 1/5. The best part is that they are 725-1000 RPM. So a single reduction is easier to attain. I have a 1/8 HP A/C 1000RPM 110 VAC fan motor just like this on a tumbler w/a 40 pound barrel. Was surprised it handles it. It turns a bit faster than most factory builts at 23 RPM. The speed of the barrel effects the load on the motor a lot. Fan motors are tough because the load is so constant. I get them used for $5 at the metal recycler. www.acpartsmiami.com/5KCP39KGS018S-Fan-Blower-Motor-15-HP-110-120-V-1000-RPM-CW-4-speed_p_39.html Thanks for the reply. I like the motor in your link, I just don't like the $$$. I don't know of any metal recyclers in my area but we do have free-cycle. I should be able to get a window a/c that I can pull a motor from. I have some questions regarding your a/c motor... Is the duty rating on your 1/8 hp motor "continuous"? Are you experiencing any heat issues with the motor (I'm assuming your running it @ 1000rpms with a pulley or gear reduction to get it to 23 rpm.) Any idea what BTU size A/C that motor came out of? Thanks for your help. Sak...
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,155
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Post by jamesp on Jan 10, 2014 21:22:05 GMT -5
It is simple SAK. Commercial A/C roof top A/C units use these motors. So many roof top units are being replaced for new efficient models. About all the fans work fine.
So you could visit an A/C repair company. Those fans are common in big roof top units. Probably not window units but it is possible. Yes. All A/C fan motors are continuos.
It runs warm. And has for 3 years w/little stoppage....
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sak
noticing nice landscape pebbles
Member since December 2013
Posts: 88
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Post by sak on Jan 10, 2014 22:06:39 GMT -5
It is simple SAK. Commercial A/C roof top A/C units use these motors. So many roof top units are being replaced for new efficient models. About all the fans work fine. So you could visit an A/C repair company. Those fans are common in big roof top units. Probably not window units but it is possible. Yes. All A/C fan motors are continuos. It runs warm. And has for 3 years w/little stoppage.... Hi James, Thanks for your great input. Now at least I know where I could start looking. Btw, it's impressive that your small motor is only running "warm" with a 40lb load for 3 yrs. I definitely need to find me one of those. Thanks again Sak
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,155
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Post by jamesp on Jan 10, 2014 23:08:24 GMT -5
I have another that has a 1/3 HP that runs four 16 pound barrels and one 30 pound barrel but at faster RPM like 40.
That motor runs pretty hot. It is a 1/3 HP washing machine motor at 1725 RPM. It is doing a lot of work.
And the pulley is giant(22 inches) due to the 1725 RPM and it is still fast.
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sak
noticing nice landscape pebbles
Member since December 2013
Posts: 88
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Post by sak on Jan 11, 2014 3:41:23 GMT -5
Hi James -
Wow!! that's a lot of rocks/weight...is 40 RPM to fast given your setup? I would think that's a good speed.
On another note...where are you getting all that rock from? That's a huge amount approx 90lbs. (Just curious)...
Sak...
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Post by pauls on Jan 11, 2014 5:37:18 GMT -5
Deep well pumps and pool pumps have good motors. Usually good horsepower rating too. Often just the pump end bearing seized and thermal cutout kicked in. If you can get it for almost nothing its worth the risk. I recently got one that had a faulty start capacitor, cost me $12 to fix.
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Post by 1dave on Jan 13, 2014 12:56:21 GMT -5
jamesp gets motors for $5 So what if that used motor only lasts a year! Thanks for the tip James!
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,155
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Post by jamesp on Jan 13, 2014 13:19:18 GMT -5
The scrap yard takes roof tops. Maybe 5 a week and tears them down. They torch the fan blades off the motor by torching the shaft off. Pile the motors to the motor scrap pile. Remove the condensers, evaporators to another pile. And so forth. Most of those motors are in great shape. Many on auxiliary fans that rarely run. Never had trouble w/them.
I am suggesting that people find A/C repair places and mostly scrap yards to see what they can find. Not many 1000 RPM motors. Great for slower moving lapidary stuff. 725 RPM is common in the 208 and 240 VAC if you wanna go there, usually wired off the low amperage control circuit. The 240's are more common.
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