In this video I take a saw blade to an old polishing lap to remove a layer of grime and reveal the gleaming surface of the metal that was hidden underneath.
Hi Justin, nice video. One thing is if you trim down the surface of a spinning lap you are going to end up with very (very!) minutely off-flat lap. That is because the diamond saw blade will not cut the same amount of material at the center as it will at the edge. At the centre (let's say at 1" from the centre, where the lap diameter is 2") your blade is going to be shaving down 2"x3.14 = 6.28 linear inches of lap surface per revolution, whereas, at the edge, and in the same amount of time, the diamond blade has almost 19 linear inches of lap surface to deal with. This may be so minute as to be insignificant. (I may, someday, test it with the dial indicator). But it would be a good place to introduce "tramming" as a final touch up in the rehab process.
Yes I understand this but actually it doesn't seem to effect my polishing experience in any perceivable way. There is always a slight difference between my topper laps, my sintered lap, and my polishing laps, so I just leave enough room between the meet points to compensate for that when going from cutting to prepolishing. If I ever did warp it too much from using the saw blade, I can take it to the lathe shop for about $6 but that's more like a once ever few years thing to do for me.
Good lord! Ware gloves. Using for free forming? I looks like animal poop. You did a good job in cleaning it. Throw it in an autoclave now. Looks good tho. You lapped the lap. Lo😂😂l
Loved your video and amazed at the improvement. Any idea what diamond grit was originally on it and what you will now add? Also, having a digital readout of the lap RPM is wonderful, rather than like a 6 or 6 1/4 out of 10 on other machines. Really appreciate your videos. Finally, I know you are in Thailand but where in Canada do you travel to as I am sure our North York Faceting Guild in Toronto would love to see you sometime. Last year we had Tom Herbst come and gave a wonderful presentation.
Don Silverbulletspider not sure about the old diamond grit. I didn’t test it before I cleaned it. I think now I’ve determine it’s a lead or tin/lead lap which I don’t mind in my arsenal. I agree the rpm meter is very handy. As for Canada, I’d love To come. I’ve never been there and it would be great to visit a club of Canadian Cutter’s. I usually come to the states in February around the Tucson show but this coming year I won’t be able to because of immigration and stuff here in Thailand. 2021 is a big mystery right now so I can’t say if I’ll leave Asia at all.
@@BrightonGemstones I had an previously unused Chrystalite tin lap that I polished topaz with an I wanted to clean it and I researched everywhere looking for advice. It had a note with it in the packaging that said not to use kerosene. I decided to clean it with tissues and spray-bottle isopropyl alcohol. It seemed to work quite well. I hope it works well next time I charge it and use it.
Thanks for sharing vedio with us. Hello sir, I am looking for lapidary machine which can use for multiple facetting gemstone. Like Diamonds and corundum gemstone. Sri Lankan Gem lapidary machine can use for both? Please let me know regarding thank you
You'll need two different machines. These machines will facet every gemstone except Diamond. Diamonds need higher RPM's and specialty dop holders due to the heat caused by faceteing.
There is no machine that can do diamonds and corundum. The method used for cutting diamond is completely different that for cutting colored stones. Diamond is incredibly hard and can’t be cut and polished in the same way that colored stones are. If you take diamonds out of the equation the any machine will work because they all can cut almost any stone.