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Post by jasoninsd on Nov 19, 2021 19:55:16 GMT -5
I have to say I consider myself extremely lucky this didn't explode on me at some point today. My blade was acting "wonky" but I continued to use it for another half hour without realizing what was wrong...sheesh! I just posted a thread yesterday about shaping cabs with the trim saw. I can say with almost 100% certainty that in no way caused this to happen. I have been shaping preforms with my trim saw all summer...in fact somewhere near 1200 of them. After I saw the damage to the blade, I really had to think about what caused this. I realized it's the way I've been shaping the preforms. When I shape the preforms, I pull them toward me on the left side of the blade. I didn't want to push it into the blade for some reason. Well over time, the preforms have been contacting the metal inside the kerf. Without me realizing it, it had worn a "groove" just to the inside of the kerf...weakening it tremendously! You can see that groove in the pictures. This "groove" is only on the left side of the blade. When I shape cabs, I've done it on the right side of the blade, which is why I know that wasn't the cause...and the preform shaping is. Anyway...I need a new blade and I need to figure out a better method for shaping the preforms...which I hope will in turn make me "good" rather than lucky! LOL   |
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Post by hummingbirdstones on Nov 19, 2021 20:03:16 GMT -5
I'm confused. If the saw blade is spinning, wouldn't it wear all the way around the kerf?  |
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Post by jasoninsd on Nov 19, 2021 20:12:33 GMT -5
I'm confused. If the saw blade is spinning, wouldn't it wear all the way around the kerf?  Don't be confused...I was bringing the preforms into the blade from the side...not "straight" into the kerf - like you would if you were making a cut. That way I was using the entire kerf width (along with that grooved spot) to shape the preforms. Does that make sense? |
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Post by rmf on Nov 19, 2021 20:28:36 GMT -5
It is always better to be good than lucky. But NEVER NEVER NEVER turn down luck:) Glad you were lucky today. Tomorrow may be a different story. that is why we share experiences so we become better and we don't have to rely on fickle Lady Luck.
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Post by hummingbirdstones on Nov 19, 2021 20:31:24 GMT -5
I'm confused. If the saw blade is spinning, wouldn't it wear all the way around the kerf? Don't be confused...I was bringing the preforms into the blade from the side...not "straight" into the kerf - like you would if you were making a cut. That way I was using the entire kerf width (along with that grooved spot) to shape the preforms. Does that make sense? Nope. If the blade is spinning, I would think even if you were bringing the preform in from the same side you would not be hitting the exact same spot every time. I would expect the whole area to be evenly thinning around the whole blade. What do I know? I've said it before and I'll say it again -- not mechanically inclined. Vince sometimes just about gets apoplectic trying to explain mechanical crap to me.  |
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Post by jasoninsd on Nov 19, 2021 20:31:52 GMT -5
It is always better to be good than lucky. But NEVER NEVER NEVER turn down luck:) Glad you were lucky today. Tomorrow may be a different story. that is why we share experiences so we become better and we don't have to rely on fickle Lady Luck. Very true my friend!  I will say I would have preferred having bought a lottery ticket and found luck that way rather than lucking out this way today! LOL |
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Post by jasoninsd on Nov 19, 2021 20:41:46 GMT -5
Don't be confused...I was bringing the preforms into the blade from the side...not "straight" into the kerf - like you would if you were making a cut. That way I was using the entire kerf width (along with that grooved spot) to shape the preforms. Does that make sense? Nope. If the blade is spinning, I would think even if you were bringing the preform in from the same side you would not be hitting the exact same spot every time. I would expect the whole area to be evenly thinning around the whole blade. What do I know? I've said it before and I'll say it again -- not mechanically inclined. Vince sometimes just about gets apoplectic trying to explain mechanical crap to me. The metal did actually wear "evenly" around the entire perimeter of the blade. It just finally broke through in that one area. That "bright silver" area around the entire blade is the groove - not just the part that broke through. The kerf is "harder" than the metal to the inside (where the groove developed) so it didn't wear as badly as that metal did. I'm able to hit the "same exact spot" because I have the preform sitting on the cutting deck as I bring it into the blade... After writing this, I realize you weren't realizing the bright silver area is actually the groove...so it really is consistent around the entire perimeter... |
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Post by mohs on Nov 19, 2021 20:43:17 GMT -5
Ha jase
Very productive
You didn’t notice the groove wear after 500th cab ?
That all right.
They don’t use the best steel discs
on those lapidary blades.
Even a lot wood cutting blade
these days are throw always.
Nonetheless for being cheap pot metal
it still its did it job by not flying apart.
Keep on shaping !
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Post by hummingbirdstones on Nov 19, 2021 20:44:57 GMT -5
Nope. If the blade is spinning, I would think even if you were bringing the preform in from the same side you would not be hitting the exact same spot every time. I would expect the whole area to be evenly thinning around the whole blade. What do I know? I've said it before and I'll say it again -- not mechanically inclined. Vince sometimes just about gets apoplectic trying to explain mechanical crap to me. The metal did actually wear "evenly" around the entire perimeter of the blade. It just finally broke through in that one area. That "bright silver" area around the entire blade is the groove - not just the part that broke through. The kerf is "harder" than the metal to the inside (where the groove developed) so it didn't wear as badly as that metal did. I'm able to hit the "same exact spot" because I have the preform sitting on the cutting deck as I bring it into the blade... After writing this, I realize you weren't realizing the bright silver area is actually the groove...so it really is consistent around the entire perimeter... (Insert lightbulb lighting up over my head) I get it now! LOL! |
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Post by jasoninsd on Nov 19, 2021 20:47:49 GMT -5
Ha jase Very productive You didn’t notice the groove wear after 500th cab ? That all right. They don’t use the best steel discs on those lapidary blades. Even a lot wood cutting blade these days are throw always. Nonetheless for being cheap pot metal it still its did it job by not flying apart. Keep on shaping ! Quite honestly, no I didn't notice it. I've never checked my blades before using them. I mean I'll glance at the kerf on the 10" to see how much life is left in it before I use it for the day...but I haven't seen any movement in the kerf on the 7" in forever, so I don't really look at it. I suppose it's like a person getting in their car...I bet none of them check their tires before each time they pull out of the driveway. LOL |
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Post by jasoninsd on Nov 19, 2021 20:49:52 GMT -5
The metal did actually wear "evenly" around the entire perimeter of the blade. It just finally broke through in that one area. That "bright silver" area around the entire blade is the groove - not just the part that broke through. The kerf is "harder" than the metal to the inside (where the groove developed) so it didn't wear as badly as that metal did. I'm able to hit the "same exact spot" because I have the preform sitting on the cutting deck as I bring it into the blade... After writing this, I realize you weren't realizing the bright silver area is actually the groove...so it really is consistent around the entire perimeter... (Insert lightbulb lighting up over my head) I get it now! LOL!  |
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Post by mohs on Nov 19, 2021 21:01:28 GMT -5
Ha jase Very productive You didn’t notice the groove wear after 500th cab ? That all right. They don’t use the best steel discs on those lapidary blades. Even a lot wood cutting blade these days are throw always. Nonetheless for being cheap pot metal it still its did it job by not flying apart. Keep on shaping ! Quite honestly, no I didn't notice it. I've never checked my blades before using them. I mean I'll glance at the kerf on the 10" to see how much life is left in it before I use it for the day...but I haven't seen any movement in the kerf on the 7" in forever, so I don't really look at it. I suppose it's like a person getting in their car...I bet none of them check their tires before each time they pull out of the driveway. LOL or check if they have cell connection at the end of their destination build your home on slopes of Vesuvius Viva Live Dangerously next time check after the 501st cab, jase ha ha |
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Post by jasoninsd on Nov 19, 2021 21:03:20 GMT -5
Quite honestly, no I didn't notice it. I've never checked my blades before using them. I mean I'll glance at the kerf on the 10" to see how much life is left in it before I use it for the day...but I haven't seen any movement in the kerf on the 7" in forever, so I don't really look at it. I suppose it's like a person getting in their car...I bet none of them check their tires before each time they pull out of the driveway. LOL or check if they have cell connection at the end of their destination build your home on slopes of Vesuvius Viva Live Dangerously next time check after the 501st cab, jase ha ha The Vesuvius reference made me laugh out loud!  |
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Post by mohs on Nov 19, 2021 21:06:06 GMT -5
or check if they have cell connection at the end of their destination build your home on slopes of Vesuvius Viva Live Dangerously next time check after the 501st cab, jase ha ha The Vesuvius reference made me laugh out loud! ya know where that quote come from jase ? if not I'll let ya google it |
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Post by jasoninsd on Nov 19, 2021 21:13:08 GMT -5
The Vesuvius reference made me laugh out loud! ya know where that quote come from jase ? if not I'll let ya google it The secret of realizing the greatest fruitfulness and the greatest enjoyment of existence is: to live dangerously! Build your cities on the slopes of Vesuvius! Send your ships out into uncharted seas! Quote by Friedrich Nietzsche *And yes...I had to Google it...but should have known it was a Nietzsche reference. |
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Brian
fully equipped rock polisher
Member since July 2020
Posts: 1,512
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Post by Brian on Nov 19, 2021 21:33:09 GMT -5
At least you picked the right time to check the blade before you had a complete failure. That’s some impressive wear, but you also got a lot of use out of that blade from the sound of it.
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Post by jasoninsd on Nov 19, 2021 21:41:08 GMT -5
At least you picked the right time to check the blade before you had a complete failure. That’s some impressive wear, but you also got a lot of use out of that blade from the sound of it. Yeah...I was just shaking my head at myself when I finally DID stop the blade to check it...only because I could tell something was wrong, but I assumed the blade was slightly tweaked...not half gone! LOL |
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Post by Rockoonz on Nov 19, 2021 22:13:01 GMT -5
Wow, that was kinda close. Glad it worked out okay.
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Post by jasoninsd on Nov 19, 2021 22:13:57 GMT -5
Wow, that was kinda close. Glad it worked out okay. Thanks...me too! LOL Definitely something I need to pay better attention to in the future!  |
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Post by parfive on Nov 19, 2021 22:52:47 GMT -5
Anyway...I need a new blade and I need to figure out a better method for shaping the preforms... Yeah, it's called a Genie.  |
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