Glass grinding with silicon carbide by hand
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- čas přidán 13. 05. 2013
- In this video, Bob demonstrates how to use loose grit silicon carbide to grind your glass by hand without using any machinery at all. A fairly straightforward process, it often comes in handy for smaller work or pieces that require less grinding to accomplish the final surface.
thanks for your time nice video help a lots
Good video... good music...
This composite is what Mclaren use on the P1 discs. Amazing!!
Perfect. I have a great Zajecar vase that would be a shame not to fix a flake. Question. The little chip flaked into the surface.... will the little fish eye blemish that flared into the glass a bit come smooth and b removed without noticing there was a flaw and may I send a photo?
It can but you may want to look at repairing with something like HXTAL if you need to fill a missing area. You can email photos to support@hisglassworks.com
Thank you, I will research how to. Should I try to remove the he chip before I consider filling. My concern is how the chip flared into the glass. The crystal is quite thick and I am not sure how deep it flared inside. Thank you
Generally, no. You don't want to grind anything before filling the area. One repair is enough.
hello, does anyone know if silicon carbide sheets can be used to scrape off paint on plastic? if so, what is your recommended grit range?
Hi i have a question that may not be completely relevant to this video. I placed aluminum foil on my glass window with water and after a couple of days i took it off and the glass has been stained by some sort of chemical process. Would this process you have demonstrated or comthing else work to get rid of the top couple of layers of glass and still look clear? thanks
You can probably just use cerium oxide to re-polish the glass without removing any layers and it should remove the staining on the glass without changing the optics of the glass.
Is it possible to get a precision polished surface this way? I'm interested in making a optical flat for toolmaking and other machinist uses.
You can achieve optically flat surfaces with this method. This is a common method for grinding telescope mirrors by hand.
Even within a tenth of a thousandth of an inch? (.0001) Wow!
Andre Gross that's more about your technique and abilities to hand grind than the process. Is it capable of that, yes. Depends on your expertise level.
@rats arsed You can hand grind dobsonian telescope mirrors to that level of precision at home with the right stages of grits, or use the three plate method to get perfectly flat planes.
Could you theoretically use media like this in a rock tumbler to produce a frosted effect on a jar ?
Of course. Silicon carbide is often used in a tumbler for working glass or stone.
Does aluminum oxide work as well as silicon carbide, or is it less effective? (BTW, you really don't need the soundtrack of the music repeating while you talk, and I'd rather just hear your voice.)
Aluminum oxide will work just as well as silicon carbide. It is a bit softer so it tends to break down faster than silicon carbide but it would still work quite nicely for hand lapping.
alox is less aggressive than SiC. The fastest grind is SiC on a metal tool. If you are doing optics, switch to a conforming tile in dental stone tool when approximate surface is established. Also, save your mud and learn to recycle it.
So I've been doing it manually with a bottle cutter. Getting to know the different type of bottles to cut. My goal is to use the bottom for candles. I use sandpaper instead of this method. The big question is, is it more effective in smoothing out the edges ? I still see the slight unevenness.
If your bottom plate glass is flat, then the rim of the glass will be flat as well once you grind it this way. It's also far faster than sandpaper.
How would you use this method for the inside rim of the glass (made from the wine bottle)?
You can try to use something like a scotch brite pad with loose grit slurry to work the inside edge by hand. It's not the easiest and you'll probably get a lot of excess area on the glass that the loose grit grinds as well as the inside rim. It might be easier with smaller diamond handipads to do inside rims by hand: www.hisglassworks.com/shop/hand-grinding/handipads.html
Was the shiny part of the piece what the 400 grit did? What grit numbers would you use to get scratches out of glass? What would you start with, what grit brings it to a polish?
For scratches, I would typically suggest just polishing them out with cerium oxide unless they are too deep to polish out. If you have to grind out the scratches, you'll have to "feather in" the surface to prevent optical distortion from the removal of the glass. If there are a lot of deep scratches, then it's best to try and replace the glass if possible.
@@hisglassworksinc Thanks.
Thanks for the info...
I purchased Siicon Carbide F120 and I couldn't remember what the purpose for it...
I do cut my Bottles, this technique is absolutely brilliant... Thank you.
I'm assuming the purpose for the Siicon Carbide F120, 600, 220 and 2000 are used for something else... I have to continue my search.
You would typically move from a rougher to a finer grit to get a cleaner surface on the glass.
Does this work with pumice and cerium oxide? I do cast glass pyramids, and can't afford the cost of a lapidary wheel system, though I would love one, so much. my goal is basically to get a smooth flatter side to my pyramids, which I can do with my diamond hand polishing pads, but I am never happy with the final result, and want to develop a smoother polish. my goal is to eventually sell enough pyramids that I can then save up and get a lap wheel system.
It won't work as well with pumice and won't work at all with cerium. For those steps, it is easier to use mechanical methods if possible.
How can I remove and polish a surface chip or flake on Lead crystal vases. Not rim chips,
I would recommend either the small 1 inch smoothing disks with a Dremel or Flex Shaft:
www.hisglassworks.com/shop/disks/disks-for-hand-held-grinders/diamond-smoothing/dual-lock-backed.html
or using the small handipads by hand:
www.hisglassworks.com/shop/hand-grinding/handipads/diamond-smoothing.html
You'll want to start as fine as possible as each successive step would need to be feathered in like when you are filling a hole in a wall with drywall compound, otherwise you'll create a non-flat area on the glass where the chip was and it will distort the optics of the glass there. Multiple grits would make the repair area very large to polish once each grit is feathered in on the glass.
hi there very inofmative video! Was wondering if you could tell us how best to remove roadrash from an irreplaceable windshield.... would this method work ?
I would hesitate to do anything this aggressive on the windshield as you'll change the optics on the windsheild too much.
How deep are the pits and scratches in the windshield? I typically would never do much more than a fine grit pumice and cerium to prevent changing the optics on the windshield.
Hey! I’m grinding an aluminium cylinder head. Could I put the powder in the area I’m polishing and use an aluminium rod to rub ....
That should work, yes.
Sorry. We try to reduce the volume of the music during the vocals, but we've found it tends to make listening and watching easier with some background music.
I need to lap a piece of natural quartz optically flat. I have an optical flat as a reference, but I don't know the best way to make the quartz optically flat by hand. This same process?
Yes, this is typically the process for handlapping a piece of quartz or telescope mirror or anything along those lines.
Can I put a frosted texture on a clear flat piece of glass, with SIC grit?
Of course! This process leaves a random frosted look on the glass
I’m not sure if you’re still responding but I recently purchased a glass grinding plate for watercolor making and I’m not entirely sure how to prep with the silicon carbide
If you're looking for a solid frosted surface on the glass, it's best to try and sandblast the surface instead of grinding it by hand. I would typically use a 220 grit for this for either the sandblaster or trying to hand grind it.
Why we use different no. Like silicon carbide 400
Ok. Would a photo help you direct me to the best approach. This chip may either be insignificant or major. I am quite uninformed and would not want to use a filler if I can repair without that step. Would you mind seeing a photo?
of course. Just email it to support@hisglassworks.com
how much thickness do u achieve? Is it in .3nm? or less than that?
Depends on the grit you use. You can control a very small amount of removal and keep it super flat depending on the flatness of your substrate underneath the grit.
will a 28 micron diamond polishing/ lapping compound work ?
Most ceriums for polishing glass are between 1 and 2 micron. While a 28 micron is very small and will give a very fine surface on the glass, it will not be a polished surface.
i was able to find a lapping compound labeled "FINE" brand is CLOVER. i think its around 250/350 ? will that give me the result i need ? thanks
What the the song is that playing in background?
Just something we threw together in Garageband
Is there a reason to use plastic cups instead of paper?
None at all. It's just what we have on hand here.
Can i use brass metal pre polish
I'm not honestly sure what that might be or whether it would work on glass surfaces or not.
Most likely not.
GLOVES!!!
Not really required. Nothing toxic in this.
where buy?
Silicon Carbide is available from our site here: www.hisglassworks.com/loose-grit/silicon-carbide.html
why so meticulous about separation of grit grades? this is not telescope optics. also, grinding on a flat steel plate cuts much faster than a glass tool and the metal surface does not go out of flatness.
Lots of different ways to do it, definitely. If you get contamination from a rougher grit on your finer grit, you'll have to go back to re-grind. While it's not telescope optics, the deeper gouge on the glass surface will not polish out.
good info, ditch the music, it is a real problem. Thanks