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Post by sophia13 on Apr 28, 2019 18:29:26 GMT -5
While slabbing on my 10" Raytech my rocks are getting pretty hot. Obsidian and agates too. New 303 blade and new arbor too. I use mineral oil light I strain frequently. Vise metal parts are very hot too. Should I be concerned and is there anything I can do to reduce the heat? Thanks all  |
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Post by manofglass on Apr 29, 2019 10:36:01 GMT -5
Change to water
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Post by vegasjames on Apr 29, 2019 17:55:36 GMT -5
Maybe the blade is getting dull or is warped a little creating more friction.
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Post by Peruano on Apr 29, 2019 17:57:43 GMT -5
Or feeding too fast or not enough coolant. Is the coolant hot?
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Post by victor1941 on Apr 29, 2019 21:01:26 GMT -5
If the blade is sharp and in the coolant one/half inch I would check to make sure the vise and arbor(blade) are aligned at 90 degrees. If you have an auto feed this should not have changed with a new arbor and the blade properly mounted but the alignment can definitely change slightly and cause your problem.
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Post by aDave on Apr 30, 2019 12:43:31 GMT -5
While slabbing on my 10" Raytech my rocks are getting pretty hot. Obsidian and agates too. New 303 blade and new arbor too. I use mineral oil light I strain frequently. Vise metal parts are very hot too. Should I be concerned and is there anything I can do to reduce the heat? Thanks all I don't have an answer for you, but I simply want to pass along this link about caring for saws and blades. Might help down the road. Good luck. forum.rocktumblinghobby.com/thread/52499/general-lapidary-info |
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Post by victor1941 on May 1, 2019 20:26:18 GMT -5
One more thing I would check is to run the blade without cutting and see if the arbor gets hot and the bearings are bad.
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Post by victor1941 on May 4, 2019 10:19:52 GMT -5
Sophia, one more thing I would check is the arbor pulley/belt combo to make sure nothing is slipping and the blade is turning at the correct rpm. This was a problem on a Covington 14" saw with the pulley slipping without a key to keep the pulley in place.
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Post by greig on May 4, 2019 11:09:27 GMT -5
All really good replies above. Bottom line: you should not be experiencing that kind of heat. At the very least, I suspect that you will ruin your blade.
I have experienced similar problems when water was no longer being pumped, so the rock and blade were bone dry during a cut. This usually happens when my water is dirty and I get a clog. I can actually see burn marks on the rocks when this happens.
Also, sometimes when the diamond blade seems dull, it might just be clogged with soft material from earlier cuts (happens to me cutting silver ore). I clean the blade quickly by cutting an old brick. Works like a charm.
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Post by grumpybill on May 4, 2019 19:22:18 GMT -5
Sophia, one more thing I would check is the arbor pulley/belt combo to make sure nothing is slipping and the blade is turning at the correct rpm. This was a problem on a Covington 14" saw with the pulley slipping without a key to keep the pulley in place. And check that the pulleys are aligned. My little Rock Rascal left the factory with the pulleys so far out of alignment that I had a pile of belt shavings after the first 15 minutes of testing it. |
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Post by sophia13 on May 5, 2019 14:22:02 GMT -5
My pulley on the arbor was spinning fairly loose. Screw was not tightened down. Friction was transferring heat. I tightened it down and heat is pretty much gone. Crazy stuff. I'm learning....slowly. Thanks all.
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jimaz
spending too much on rocks
Member since July 2018
Posts: 476 
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Post by jimaz on May 5, 2019 14:44:12 GMT -5
Glad you found the issue. So nice to have this forum to get great info.
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