Nappers
off to a rocking start
Member since November 2017
Posts: 17
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Post by Nappers on Dec 7, 2017 9:28:09 GMT -5
I misspoke. It’s USA Bearing and Belts. Not sure if on eBay anymore but have a site. www.usabearingsandbelts.comAgain hope you get it figured out!!!!!!
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Post by MrP on Dec 7, 2017 10:22:20 GMT -5
Do you have key stock for the pulley that has moved to contact something?..........................MrP
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,688
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Post by Fossilman on Dec 7, 2017 10:24:28 GMT -5
Sounds like one of those pillow bearings has a flat bearing.....
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Post by rockjunquie on Dec 7, 2017 10:28:00 GMT -5
Can't help but I am impressed with all the help you're getting from others. Hope you suss it out.
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Tommy
Administrator
Member since January 2013
Posts: 12,686
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Post by Tommy on Dec 7, 2017 11:00:02 GMT -5
Did you roll the spindle on a flat surface, to see if it's pretty true? Pillow blocks won't handle that if it's worn or not true. But back to your first comment - is this the SAME popping noise from three sets of different bearings as your comment hinted? Seems odd to me that they would all fail in this 'not so normal like a screeching bearing fail' way. If so, that would lead me to something else being wrong other than the bearings? Weld or support loose? dunno, just seems more than coincidental even for Chinese bearings. No - the first time I replaced the bearings that came with the saw they had gotten loud and crunchy when you spun the shaft - like you expect to hear and feel in a bearing failure. The second time this last summer started with a motor platform problem of my own creation - after I fixed the root problem the bearings were trashed and very loose and the cut quality went to hell. I was sweating bullets that I might have ruined the blade but yesterday's clean cuts put that fear to bed. I did not try rolling the spindle - I'll definitely do that before throwing another set of bearings at it.
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Tommy
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Member since January 2013
Posts: 12,686
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Post by Tommy on Dec 7, 2017 11:04:40 GMT -5
Do you have key stock for the pulley that has moved to contact something?..........................MrP I was thinking that too - there are two set screws on each bearing collar that if they were hitting something it would be on an interval that matches the sound. I torqued on them yesterday to make sure they hadn't come loose but I'll take another look this morning.
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Post by roy on Dec 7, 2017 12:12:58 GMT -5
I keep telling my wife it was easier keeping my first car - a 68 Impala - running than it has been to keep this rock saw running. I'm on my second third set of bearings in two years in my vintage (refurbished) 18" Highland Park saw - I replaced them this morning. I followed the Highland Park Saw Blade Alignment video on Youtube as close as I possibly could without a dial indicator. Visually, the blade is pretty damn close to perfect and it cut smooth and clean ... ... for three cuts. Now the bearings are making popping noises again Any ideas what I'm doing wrong??? I was told these self-aligning bearings come packed with grease - I wasn't supposed to pack them was I? There is nowhere on the Ebay listing to indicate if they were supposed to be packed or not. i had this problem once so instead of ordering the bearings on line i went to our local store and he got me some high grade set 140 dollars later i have not had a problem since ! and do not grease those or youll ruin them
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Post by oregon on Dec 7, 2017 14:25:28 GMT -5
I was told these self-aligning bearings come packed with grease - I wasn't supposed to pack them was I? There is nowhere on the Ebay listing to indicate if they were supposed to be packed or not. Always wondered if cheapos might be missing the hole for grease, or aligned wrong... - Youtube! I didn't know these were that easy to disassemble and check!
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Tommy
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Member since January 2013
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Post by Tommy on Dec 7, 2017 15:39:00 GMT -5
Update: So I started taking a fresh look at it this morning - loosened the front (blade-side) bearing and wiggled it straighter - no change. Took out the set screws and with a screwdriver stopped the bearing from spinning and still no change - so it wasn't the front bearing. Took out the set screws from the back bearing (pulley side) and the noise magically stopped. Put them back in the noise was there again. Took them out again and tightened down the front again and realigned the blade and the noise stayed gone. I know for a fact that the set screws were not hitting anything - they are designed with plenty of clearance in the bearing housing. SO for some strange reason when they were tightened down they are creating some weird stress inside the bearing. I left them out and my six-four is running smooth and quiet again. I'm happily cutting up a big chunk of Owyhee that I paid too much for on Ebay Thank you everyone for the input and help.
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Post by captbob on Dec 7, 2017 15:46:26 GMT -5
Glad that's been figured out.
How much oil is touching your blade? I have never had ground rock residue on a blade like that. Just wondering if that blade is running too dry.
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fishnpinball
Cave Dweller
So much to learn, so little time
Member since March 2017
Posts: 1,491
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Post by fishnpinball on Dec 7, 2017 15:47:29 GMT -5
Awesome. Nice looking chunk of rock too!
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Tommy
Administrator
Member since January 2013
Posts: 12,686
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Post by Tommy on Dec 7, 2017 15:53:42 GMT -5
Glad that's been figured out. How much oil is touching your blade? I have never had ground rock residue on a blade like that. Just wondering if that blade is running too dry. Thanks. It's good - a little on the high side just above the serrated edge. The blade looks like that because I was messing around with it - screwing the mesh tray back in place before staging that slab back like it had just fallen off.
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AzRockGeek
has rocks in the head
Member since September 2016
Posts: 636
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Post by AzRockGeek on Dec 7, 2017 17:06:15 GMT -5
Interesting.... I am glad to hear your cutting again.
Did the arbor shaft fit snug in the bearing? I am wondering if tolerance of the ID of the bearing is so bad that when you tighten the set screws the arbor was no longer seated proper in the bearing throwing it out of balance.
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Tommy
Administrator
Member since January 2013
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Post by Tommy on Dec 7, 2017 19:23:04 GMT -5
Interesting.... I am glad to hear your cutting again. Did the arbor shaft fit snug in the bearing? I am wondering if tolerance of the ID of the bearing is so bad that when you tighten the set screws the arbor was no longer seated proper in the bearing throwing it out of balance. Thanks! Yes it fit very snuggly. In fact the tolerance was so tight I had to file down the divots made by the pulleys to get the bearings on.
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Nappers
off to a rocking start
Member since November 2017
Posts: 17
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Post by Nappers on Dec 7, 2017 19:49:37 GMT -5
Glad you got it figured out. Beautiful rock!
I bought the USA Bearings in the past for my Harbor Fright 1X30 belt sander that I toasted the bearings from working on metal (making a throwing knife for black powder rondo) and replaced the ones in my import drill press.
Glad you're back at it.
Aaron
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Dec 7, 2017 21:27:17 GMT -5
For my tumbler I have Japanese Miwa bearings. The distributor was clear on this point.
Grease them until a bit extrudes out the seals. They are dry when shipped.
That doesn't speak for your situation. So buy Miwa and grease them. Then you are good. 👍
ETA
I see you found the bugger. Good on you!
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Post by johnjsgems on Dec 7, 2017 21:37:43 GMT -5
Is there a cover over the bearings? If not rock laden oil will do bad things to bearings. Second on the check shaft for wear. Bearings will wear fast if shaft is worn. Does it make same noise if you remove belt and turn by hand?
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Post by Rockoonz on Dec 7, 2017 21:45:34 GMT -5
I had a similar deal with some replacement bearings on my old HP14 inch. I think the center race was loose enough to be slightly skewed on one of them, I just let it pop and started accumulating high end US bearings whenever I found deals. Never bought chinese since and no more noises.
Never had a '68 chevy, Had a base model '69 Impala that I was OK with and a '67 Caprice that I wish I still had.
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vwfence
has rocks in the head
Member since January 2013
Posts: 557
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Post by vwfence on Dec 7, 2017 23:06:54 GMT -5
Is that belt pulley possibley hitting on something ?
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Post by oregon on Dec 8, 2017 12:57:40 GMT -5
I left them out and my six-four is running smooth and quiet again. I'm happily cutting up a big chunk of Owyhee that I paid too much for on Ebay So, you said it's snug, I'll guess the bearing is still doing it's job, not just acting like a steel bushing. Without anchoring the bearing to the shaft, I'd worry about slip, and damaging the shaft over time. Makes me also wonder if it is out of true a bit. Always liked the egocentric lock collars better than set screws... Of course if you have to get rid of it in a short while, might not matter.
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