rocknewb101
fully equipped rock polisher
Member since October 2022
Posts: 1,368
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Post by rocknewb101 on May 28, 2024 8:35:54 GMT -5
I just got a 10" Covington trim saw not too long ago (used) and had to replace the blade. I've noticed with the new blade that I'm getting saw marks and scratches. It will happen if I put the rock in the vice and hand push it through, and seems to be worse if I just hand push it through. Am I pushing too hard? Or could there be bad bushings? I'm going to reach out to Covington too to see if they have any kind of schematic (we have for the new 10" trim, but not the old version) to try and determine where a bushing may be, if there is one.   When I hand push it seems to have more ridges than just scratches like it shows here - this one was in the vice and hand pushed through. The saw had a weight system at one time, but can't seem to find one online now. |
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dshanpnw
fully equipped rock polisher
Member since December 2020
Posts: 1,158
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Post by dshanpnw on May 28, 2024 14:17:15 GMT -5
Are you talking about a bushing that goes on the arbor between the blade and the machine?
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rocknewb101
fully equipped rock polisher
Member since October 2022
Posts: 1,368
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Post by rocknewb101 on May 28, 2024 15:22:33 GMT -5
 Are you talking about a bushing that goes on the arbor between the blade and the machine? Honestly, I'm not sure. I reached out to Covington and they gave me some things to try, but they also said it could be the arbor - but when they showed the piece it's small - I don't exactly know all my saw parts - working on it, but I thought the arbor was the 'pipe' that the blade or wheels go on. This they call a ball bearing arbor...  |
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goldfinder
Cave Dweller 
Member since December 2020
Posts: 273
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Post by goldfinder on May 28, 2024 15:53:17 GMT -5
What type of blade did you put on it rocknewb101? Crimped edge blades typically give a rougher finish than sintered do. |
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rocknrob
has rocks in the head
If Costco only sold slabs in bulk...
Member since May 2024
Posts: 613
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Post by rocknrob on May 28, 2024 15:53:27 GMT -5
I just got a 10" Covington trim saw not too long ago (used) and had to replace the blade. I've noticed with the new blade that I'm getting saw marks and scratches. It will happen if I put the rock in the vice and hand push it through, and seems to be worse if I just hand push it through. Am I pushing too hard? Or could there be bad bushings? I'm going to reach out to Covington too to see if they have any kind of schematic (we have for the new 10" trim, but not the old version) to try and determine where a bushing may be, if there is one. When I hand push it seems to have more ridges than just scratches like it shows here - this one was in the vice and hand pushed through. The saw had a weight system at one time, but can't seem to find one online now. I'm glad I waited until after I had my coffee to comment on here because I saw that first pic and thought that was your blade edge there. So glad that wasn't the case. Have you noticed a high amount of vibration in the saw blade? I've heard that even the smallest piece of sediment on the arbor (or the blade mount) can cause that kind of rough cutting. Does the blade run hot when you're cutting? I would try doing a good light clean out of anything that comes in contact with the blade, strong plastic (or even copper) brush depending on if you feel any nicks or bumps when you run your hand along it. It doesn't take much to make a blade that thin to wobble a touch. - Rob |
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rocknewb101
fully equipped rock polisher
Member since October 2022
Posts: 1,368
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Post by rocknewb101 on May 28, 2024 16:02:35 GMT -5
What type of blade did you put on it rocknewb101 ? Crimped edge blades typically give a rougher finish than sintered do. This new blade is crimped. I wondered about that - and wasn't sure if I could use a sintered blade on this machine. I'd actually prefer to use sintered as they tend to be thinner (I think, anyways), but for now I'll have to use what I have as it cost me $100 and I don't want to waste that lol. |
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rocknewb101
fully equipped rock polisher
Member since October 2022
Posts: 1,368
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Post by rocknewb101 on May 28, 2024 16:05:20 GMT -5
I just got a 10" Covington trim saw not too long ago (used) and had to replace the blade. I've noticed with the new blade that I'm getting saw marks and scratches. It will happen if I put the rock in the vice and hand push it through, and seems to be worse if I just hand push it through. Am I pushing too hard? Or could there be bad bushings? I'm going to reach out to Covington too to see if they have any kind of schematic (we have for the new 10" trim, but not the old version) to try and determine where a bushing may be, if there is one. When I hand push it seems to have more ridges than just scratches like it shows here - this one was in the vice and hand pushed through. The saw had a weight system at one time, but can't seem to find one online now. I'm glad I waited until after I had my coffee to comment on here because I saw that first pic and thought that was your blade edge there. So glad that wasn't the case. Have you noticed a high amount of vibration in the saw blade? I've heard that even the smallest piece of sediment on the arbor (or the blade mount) can cause that kind of rough cutting. Does the blade run hot when you're cutting? I would try doing a good light clean out of anything that comes in contact with the blade, strong plastic (or even copper) brush depending on if you feel any nicks or bumps when you run your hand along it. It doesn't take much to make a blade that thin to wobble a touch. - Rob haha!!! Yeah, that would have been bad lol...I don't notice any vibration in the blade itself, but the guard wobbles a bit - it seems a bit loose, so not sure that's a big issue. Going to have hubby look at it (he's way more mechanically inclined than I am). Thanks for the tips on making sure it's clean - I'll take it apart and look closer. The blade does not run hot at all - I use the koolerant (greenish blue liquid) with water and it seems to do a really good job of keeping things cool. |
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Post by chris1956 on May 28, 2024 17:40:38 GMT -5
I would agree about cleaning everything in contact with the blade. Make sure you get the inside threads on the nut cleaned (might need a toothbrush or orther brush) as well as the threads on the shaft and the little flange as well as where it contacts the blade. Also, check your vice to see if there is any sideways give in it. Not too surprised you have issues when you do by hand. I had the same issues when I got a new Covington 10" saw. I haven't worried about it too much because I mainly use it for trimming slabs.
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rocknewb101
fully equipped rock polisher
Member since October 2022
Posts: 1,368
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Post by rocknewb101 on May 29, 2024 14:10:58 GMT -5
I would agree about cleaning everything in contact with the blade. Make sure you get the inside threads on the nut cleaned (might need a toothbrush or orther brush) as well as the threads on the shaft and the little flange as well as where it contacts the blade. Also, check your vice to see if there is any sideways give in it. Not too surprised you have issues when you do by hand. I had the same issues when I got a new Covington 10" saw. I haven't worried about it too much because I mainly use it for trimming slabs. Thank you! I will be doing this for sure. Covington had me put a pencil in the vice and see if there's a bigger gap on either end to determine if the vice is off - it seems pretty true. I did get another arbor for it so that's on it's way. The saw seems fairly old so I'm guessing that could be part of the problem. We'll troubleshoot and figure it out. But agreed, a good cleaning is needed, although the outer parts of the saw were very clean when shipped. |
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rocknewb101
fully equipped rock polisher
Member since October 2022
Posts: 1,368
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Post by rocknewb101 on Jun 3, 2024 13:08:15 GMT -5
So I did get the new arbor, cleaned everything up and it's now working much better. I still get saw marks if I hand push it (I tend to roll the rock through, which is likely causing that), but when clamped in the vice it goes much more smoothly. Thanks for the comments.
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