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Post by Roller on Apr 12, 2011 11:03:54 GMT -5
I was wondering if someone here who has a qt12 could tell me how many times per minute there barrel turns with a full load ? Thanks Greg
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snuffy
Cave Dweller
Member since May 2009
Posts: 4,319
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Post by snuffy on Apr 12, 2011 11:18:58 GMT -5
Hey, roller,I just checked mine,I've got 3 rolling. 2 of them are right at 30. 1 is 25, its always turned slower than the others.
snuffy
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Steve
has rocks in the head
Member since June 2005
Posts: 506
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Post by Steve on Apr 12, 2011 17:33:47 GMT -5
One of mine runs at 30 rpm, the other at 0 rpm with a full load. Guess one of them needs work
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,466
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Post by Sabre52 on Apr 12, 2011 18:12:03 GMT -5
Oh lets see, Lortone QT12's huh? I've got two that won't roll at all unless the barrels are empty *L*. Got three 33B's that roll the same speed....Mel
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Post by connecticutwayne on Apr 12, 2011 19:54:55 GMT -5
Mine runs at 27 rpm.
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Post by Roller on Apr 12, 2011 22:27:09 GMT -5
Thanks guys ... was just checking if mine is running right mine is dead on 30 as well ...... I guess I may be decent at cabbing but really am the worlds worst tumbler ... How much rock do you guys put in there ? 2/3.... 3/4 or 1/2? i have so far tried 3/4 and 2/3 likes 5 times ... with pretty bad results every time ...I havent touched it in almost a year but just decided to play with it again ... first time was a horror ... there was no slurry at all !!! all the grit stuck to one corner and had some foam ... trying again lloking better now ... thinking it was too full... thinking of trying 1/2 full next time .if this dont work ..
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Post by susand24224 on Apr 12, 2011 22:35:58 GMT -5
Hey, Greg,
Mine runs at 28 rpm. My experience with it is to add a bit less water. With the smaller tumblers I go to the bottom of the top layer of rocks, but as the tumblers increase in size (beginning with the qt12) I start decreasing water. I really don't think the load needs less water, I think there are more spaces for the rock to sink into so after a bit of time tumbling the load is more compressed, for lack of a better word. I've had too many times opening the darn thing in a day or two and finding the water level above the top layer with darn little loss of rock.
Susan
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Post by catmandewe on Apr 13, 2011 1:13:02 GMT -5
Make sure you have a variety of sizes in there too, I think that is the most important part. You need baby rocks in with the good rocks to be good grit carriers and to act as ball bearings to keep the rocks moving good.
Tony
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,466
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Post by Sabre52 on Apr 13, 2011 7:53:38 GMT -5
Roller: At 2/3 or more full it's really easy to have the QT 12 barrel way to heavy for the machine which will wear out the motor pretty fast. If you weigh your barrel at 2/3 or more full it's often over 15 pounds, sometimes close to 18. Twelve pounds usually means about 1/2 full in my case so I weigh my barrels and try to not have them be too heavy. As the machine ages, I find this weight problem gets more and more important till eventually , the machine just conks out. As Tony has said, a mixed size load works best but I sometimes run uniform sized loads and at half full with water barely to the top of the stones, the rocks seem to carry the grit well and grind no slower than with mixed loads.....Mel
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Post by susand24224 on Apr 13, 2011 11:20:51 GMT -5
To follow up a bit on Mel's post, I fully agree that the motors will wear out quickly. For me an essential way to extend the life of the motor is to keep a lot of belts on hand. As soon as you see any slippage, change the belt. My experience with Lortone belts is that they are not very good quality. After my 3B, my 4 lber and my 6lber all kicked the bucket after approximately one year, while my Thumlers went twenty years, I had an extended conversation with Lortone the end result of which was advice to change the belts frequently. This is certainly a lot cheaper than replacing the motor almost as often.
Susan
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Post by rocklicker on Apr 15, 2011 11:46:34 GMT -5
THanks for the post. I have one that I was not sure about. Looks like I have been overloading it a bit. Does anyone find that the motor gets really hot? Mine is too hot to touch even with half the load. Steve
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snuffy
Cave Dweller
Member since May 2009
Posts: 4,319
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Post by snuffy on Apr 15, 2011 14:00:50 GMT -5
All mine are hot to the touch.I keep a small fan blowing over my tumblers,dont know if it helps or not, can't hurt.
snuffy
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