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Old 10-02-2012, 08:38 PM   #21
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Very cool!


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Old 10-02-2012, 08:43 PM   #22
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Looking good. I'm hoping I will have the cash to start my build soon. Can't wait to see the finished product.


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Old 10-02-2012, 08:44 PM   #23
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Originally Posted by CoalCracker View Post
So if I understand it right, the pillow blocks don't rotate on a central axis but more of an oval? This would cause the sag? Thought it was just a basic bearing in a mount with some set screws.
No - The bearing rotates as a bearing should. The oval is simply a "Cam" like way of binding the shaft to the bearing. However, the entire bearing is able to rotate in 2 axes inside of the pillow block.
Since the hoop is 2" by 1/8" mild steel, I can see that "twisting" load on the hoop causing problems.

If the bearing is fixed in a perpendicular fashion in relation to the MLT, there is no twisting load on the hoops and MLT.

A quick drawing, because I'm doing a terrible job of explaining this
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What does the primary pressure gauge on the tank tell us? That's right, the temperature. Put it on a scale if you want to know how much is in it...
Put some duct tape over the gauge - Or better yet - Replace the high pressure gauge with a plug - High pressure gauges are useless!
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Old 10-02-2012, 08:48 PM   #24
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Gotcha, How about making the shaft a hair longer and then adding a collar on the outside to essentially "lock" the bearing in place?
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Old 10-02-2012, 08:54 PM   #25
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Gotcha, How about making the shaft a hair longer and then adding a collar on the outside to essentially "lock" the bearing in place?
The problem isn't locking the shaft into the bearing. The bearing has either an eccentric cam (The oval you refer to) or a set screw. The problem is that the pillow block will allow the weight of the MLT to "sag" the bearing inside the pillow block. This will cause your hoop to twist vertically on the MLT and that's bad.

What I'm saying, is that the hoop will not have enough resistance to that "Twist" to hold the shaft perpendicular to the MLT, because the bearing will allow that degree of motion.

If the bearing is fixed with relation to the shaft (Still able to rotate on the tippy axis, but not on the sagging hoop axis) you won't have that problem because the bearing will take all of that load.

Here's a really crappy pic of a pillow block "Out of alignment" if you will...
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Originally Posted by Ecnerwal View Post
What does the primary pressure gauge on the tank tell us? That's right, the temperature. Put it on a scale if you want to know how much is in it...
Put some duct tape over the gauge - Or better yet - Replace the high pressure gauge with a plug - High pressure gauges are useless!
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Old 10-02-2012, 08:58 PM   #26
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wow ok, now I see. Not sure why that was so hard for me to grasp... Looks like a fixed V might be a better choice. Was just looking to make the operation of tipping it smooth and not so much metal on metal.
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Old 10-03-2012, 12:46 AM   #27
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Either that or put 2 pillow blocks per side. That would force it to remain parallel with the stand. Use 1/2" id bearings and shaft - they are cheap as hell at harbor freight
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Originally Posted by Ecnerwal View Post
What does the primary pressure gauge on the tank tell us? That's right, the temperature. Put it on a scale if you want to know how much is in it...
Put some duct tape over the gauge - Or better yet - Replace the high pressure gauge with a plug - High pressure gauges are useless!
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Old 10-03-2012, 05:21 AM   #28
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Old 10-03-2012, 02:27 PM   #29
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Let me see if I understand this. You want to use 1 pillow block to tip the tun for cleaning? So it would be canitlevered like in the drawing?
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Old 10-03-2012, 02:30 PM   #30
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Yea the plan was to put a pillow block on both sides to aid in tipping the MT.


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