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Post by miket on Sept 4, 2019 14:44:33 GMT -5
So my QT66 keeps stopping. I made sure it wasn't overloaded, I've oiled the rollers and the only thing I know left to do is replace the belt. It's a little loose, but it's not even a year old.
Any suggestions? Thanks. Mike
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Post by aDave on Sept 4, 2019 15:35:49 GMT -5
Could be a slippage issue. Pull the pulley cover off and then attempt to stop your rolling barrels by putting hand pressure on them. If the shaft stops, but the motor is still spinning, the belt is too loose. If it's adjusted properly, the motor should stop when you stop the drive shaft from turning.
If it is slipping, I'd simply try to tighten it first. A new belt would be the next option.
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Post by miket on Sept 4, 2019 15:56:33 GMT -5
Could be a slippage issue. Pull the pulley cover off and then attempt to stop your rolling barrels by putting hand pressure on them. If the shaft stops, but the motor is still spinning, the belt is too loose. If it's adjusted properly, the motor should stop when you stop the drive shaft from turning. If it is slipping, I'd simply try to tighten it first. A new belt would be the next option. Ok, thanks!
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Post by aDave on Sept 4, 2019 16:24:49 GMT -5
Could be a slippage issue. Pull the pulley cover off and then attempt to stop your rolling barrels by putting hand pressure on them. If the shaft stops, but the motor is still spinning, the belt is too loose. If it's adjusted properly, the motor should stop when you stop the drive shaft from turning. If it is slipping, I'd simply try to tighten it first. A new belt would be the next option. Ok, thanks! If you have a hard time with trying to stop the barrels, you just may want to see if you can roll the drive shaft by hand while holding onto the drive pulley on the motor shaft (tumbler not plugged in). If you can, the belt is too loose. I tend to do that more than the barrel stoppage thing. Sorry for the wild goose chase.
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Banjocreek
fully equipped rock polisher
Member since March 2003
Posts: 1,115
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Post by Banjocreek on Sept 4, 2019 20:46:51 GMT -5
If the belt is slipping, I have been able to get a better grip by holding a bar of soap to the friction side of the belt (inside track), and slippage will be gone for a decent amount of time.
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Post by miket on Sept 4, 2019 22:17:09 GMT -5
If you have a hard time with trying to stop the barrels, you just may want to see if you can roll the drive shaft by hand while holding onto the drive pulley on the motor shaft (tumbler not plugged in). If you can, the belt is too loose. I tend to do that more than the barrel stoppage thing. Sorry for the wild goose chase. I like chasing geese, no worries! I moved the motor a little and it seems to have worked. I'll check in the morning, thanks again.
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Post by aDave on Sept 4, 2019 23:23:31 GMT -5
If you have a hard time with trying to stop the barrels, you just may want to see if you can roll the drive shaft by hand while holding onto the drive pulley on the motor shaft (tumbler not plugged in). If you can, the belt is too loose. I tend to do that more than the barrel stoppage thing. Sorry for the wild goose chase. I like chasing geese, no worries! I moved the motor a little and it seems to have worked. I'll check in the morning, thanks again. Well, I hope it works out for you. When I was rolling 45C's it was easy to stop the barrels due to their size to check belt tension. I found myself using the other technique for the QT66 barrels. Don't quote me, but I seem to recall there should be about 1/4" of belt deflection when pressing on it to check for tension. But honestly, I can't say for sure where I saw that. You definitely don't want the belt so tight that there's no deflection whatsoever when you press down on it. That would end up being hard on motor shaft bearings.
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Post by TheRock on Sept 5, 2019 3:00:01 GMT -5
Other than what ADave said I will add a Maintenance Tip here. I find there tends to get a film or grime coating on pulley and belt. I have 6 Thumler B's a QT66 and a Lortone 33B I use alcohol on a QTip for the Pulleys and wipe the belt with alcohol on paper towel. Get the grime and film off those parts. I usually do all the tumblers once a month. Along with Oil on the bearings and ck the belts.
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Post by miket on Sept 5, 2019 9:39:32 GMT -5
Other than what ADave said I will add a Maintenance Tip here. I find there tends to get a film or grime coating on pulley and belt. I have 6 Thumler B's a QT66 and a Lortone 33B I use alcohol on a QTip for the Pulleys and wipe the belt with alcohol on paper towel. Get the grime and film off those parts. I usually do all the tumblers once a month. Along with Oil on the bearings and ck the belts. Thanks for the tips! I'll definitely do that- the good news is that it was still rolling along this morning after adjusting the motor a bit.
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Post by rmf on Sept 5, 2019 13:53:56 GMT -5
On QT66 you loosen the motor to tighten the belt. Heat will sometimes cause the belt to expand. I had a customer that used a 6# drum with steel shot to tumble Sterling silver castings. Not sure you can overload the tumbler even with hematite but they do need to be 80% full to work well. If it is a smooth drum you may need to rough it up with coarse sandpaper. Last but not least you may need to put the non drive side up an inch to make sure more of the weight is on the drive shaft.
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Post by arghvark on Sept 10, 2019 8:18:38 GMT -5
Just another (inflation adjusted) 73 cents worth:
I too had the belt slipping on a QT-66 after a few months. Stretch or wear, possibly both. Adjusted it once and it's been running flawlessly for about 2 years.
Argh
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Post by miket on Sept 10, 2019 9:25:13 GMT -5
Just another (inflation adjusted) 73 cents worth: I too had the belt slipping on a QT-66 after a few months. Stretch or wear, possibly both. Adjusted it once and it's been running flawlessly for about 2 years. Argh Good to hear! I adjusted mine too and it's been running flawlessly since. Thanks Eric.
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