Tommy
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Post by Tommy on Dec 6, 2017 17:10:22 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.
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Post by Pat on Dec 6, 2017 17:25:12 GMT -5
Ask Santa for a newer/new rock saw. Santa solves lots of problems : )
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Post by woodman on Dec 6, 2017 17:25:54 GMT -5
Does it make the same noise with the belt off? Have you shot them full of grease?
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Tommy
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Post by Tommy on Dec 6, 2017 17:36:01 GMT -5
Does it make the same noise with the belt off? Have you shot them full of grease? That's part of my question - last time I installed this type of bearing I was told NOT to shoot grease into them because they come prepacked from the factory and it was not good to shoot new grease in. If they are dry then I've probably burned them up already ... grrr...
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Tommy
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Post by Tommy on Dec 6, 2017 17:48:38 GMT -5
Ask Santa for a newer/new rock saw. Santa solves lots of problems : ) Heehee - Santa keeps bugging me to let Santa bring me a new one but we don't know how long we're going to be in this house caring for momma. Once that comes to an end or we hand the duty off to someone else we'll be moving back to Napa. The Napa house is one of those typical bay area big tall houses packed together like sardines in a can with tiny little yards - no room for me to even bring this saw. I need to just keep it running as long as I can and STOP bringing home new rough to cut up LOL.
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Post by woodman on Dec 6, 2017 17:48:40 GMT -5
As you rotate the blade feel the bearings, would tell which it is if it is a bearing. To me it really sounds wrong for a bad bearing.
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AzRockGeek
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Post by AzRockGeek on Dec 6, 2017 17:50:52 GMT -5
You always want to put at least one pump of grease in them, don't over fill them so the grease shoots out the seal.
The noise sounds odd, can you narrow it down to the actual bearing? Place a extra large flat head screw driver so that the end is touching the bearing and place your ear on top of screw driver, turn abor to make the noise, if noise is from bearing you will hear it. Does it make it the noise when the blade is removed? What about removing the drive belt?
If they are Chinese bearings they are hit or miss, Japanese are better, if you got extra $$$ by made in the USA.
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Tommy
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Post by Tommy on Dec 6, 2017 17:52:53 GMT -5
As you rotate the blade feel the bearings, would tell which it is if it is a bearing. To me it really sounds wrong for a bad bearing. I tried to do that but couldn't feel anything out of the ordinary... It's definitely upper end - it does it with both belts taken off although it's not as loud which might have something to do with it being cooled down now... I don't know what else it could be.
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Tommy
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Post by Tommy on Dec 6, 2017 18:28:59 GMT -5
You always want to put at least one pump of grease in them, don't over fill them so the grease shoots out the seal. The noise sounds odd, can you narrow it down to the actual bearing? Place a extra large flat head screw driver so that the end is touching the bearing and place your ear on top of screw driver, turn abor to make the noise, if noise is from bearing you will hear it. Does it make it the noise when the blade is removed? What about removing the drive belt? If they are Chinese bearings they are hit or miss, Japanese are better, if you got extra $$$ by made in the USA. I tried the screwdriver trick but I can't tell - they are both loud. Reminds me of my 68 Impala again - my Dad taught me to use a garden hose to your ear to tell which valve was knocking and needed adjustment lol. Definitely still present with the blade off - also still present with the drive belt off although a lot quieter.
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AzRockGeek
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Post by AzRockGeek on Dec 6, 2017 20:36:55 GMT -5
That is one Boogered bearing. Send back for replacement. Did you get a warranty with that saw?
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fishnpinball
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Post by fishnpinball on Dec 6, 2017 21:10:48 GMT -5
That is a very odd sound for a bearing... how is the alignment between the pulley sheaves. Other thing to look at is if the pulley sheave by the arbor is hitting the side of the saw, or if the shaft is rubbing where it goes thru the side.
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Post by toiv0 on Dec 6, 2017 21:35:32 GMT -5
shoot a shot or two of grease in it first one bearing then the other and see if it muffles it. You should be able to just buy inserts instead of the whole pillow block.
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AzRockGeek
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Post by AzRockGeek on Dec 6, 2017 22:01:00 GMT -5
That is a very odd sound for a bearing... how is the alignment between the pulley sheaves. Other thing to look at is if the pulley sheave by the arbor is hitting the side of the saw, or if the shaft is rubbing where it goes thru the side. I agree, does not sound like a typical bearing failure. The frequency and sound of the noise is wrong.
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Nappers
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Post by Nappers on Dec 6, 2017 22:07:41 GMT -5
If the seal is rubber you can use a thin feeler gauge (from setting the points in the Impala) to work the seal out then put a little grease in them. My theory is the shaft is not square with the bearings somehow and toasting the bearings. Picture a misaligned bell housing, it'll toast your main bearings quickly as it's putting unwanted pressure on them to one side.
Hope you figure it out!!!! What a pain. US Bearings (ebay) has good prices on bearings.
Aaron
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Tommy
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Post by Tommy on Dec 7, 2017 0:05:43 GMT -5
Did you get a warranty with that saw? Nope but I didn't get one for the Impala either I loved that car
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Tommy
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Post by Tommy on Dec 7, 2017 0:09:33 GMT -5
That is a very odd sound for a bearing... how is the alignment between the pulley sheaves. Other thing to look at is if the pulley sheave by the arbor is hitting the side of the saw, or if the shaft is rubbing where it goes thru the side. Yeah I checked all that - shaft is not rubbing it's centered in the hole and nothing is hitting. After the noise started on the third cut I took both pulleys off and adjusted the distance between the main pulley and the housing.
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Tommy
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Post by Tommy on Dec 7, 2017 0:14:46 GMT -5
My theory is the shaft is not square with the bearings somehow and toasting the bearings. Picture a misaligned bell housing, it'll toast your main bearings quickly as it's putting unwanted pressure on them to one side. Hope you figure it out!!!! What a pain. US Bearings (ebay) has good prices on bearings. Aaron Thanks - visually it all looks pretty good. In the act of aligning the blade the blade side bearing moved slightly out of square but isn't that the reason we use self-aligning bearings? I don't know, I'm just asking because I thought those bearings were designed to self correct if out of alignment.
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Tommy
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Post by Tommy on Dec 7, 2017 0:20:54 GMT -5
US Bearings (ebay) has good prices on bearings. Can you point me to this seller's page? I've searched but can't find that name. Thanks!
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Post by oregon on Dec 7, 2017 1:29:58 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.
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Post by Peruano on Dec 7, 2017 8:02:40 GMT -5
Tommy, You don't need another person telling you it ain't a bearing, but I'd keep looking for another culprit. Mark the shaft and mark the blade; does the click occur at the same point of rotation for either of these. Roll it real slow and see if you can feel it binding. Pulleys make all kinds of noises when they are untrue or loose. Pull the pulley and rotate the shaft; is the noise the same. I'd definitely do a squirt of grease in each bearing, but you probably have already done that. It may be a cracked frame brace or a loose bolt, but only time and diligence will disclose it.
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