How to cut bottles?

Discussion in 'Other Skills' started by Brazito, Apr 7, 2012.

  1. Brazito

    Brazito Supporter Supporter

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    Couldn't find an off topic section so I'll post this here. Mods please move if neccessary.

    I need to cut bottles. Tried a diamond blade in my compound miter saw but the edge chipped and/or cracked. Have any of y'all had luck cutting bottles and how did you do it?
     
  2. Seeker

    Seeker Woods Bum Supporter Bushcraft Friend Bushclass I

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    i've never done it. but if i had to, i'd put a tile blade set really low in my table saw and roll it in gently, cutting a little at a time, more like scoring the edge. then i'd try to 'crack' it along the score line.

    once a blade is through something, it changes the physics a bit, puts other stresses on the material, and if you don't keep account of them, you may end up with your hand in the saw... by which i mean once the blade goes all the way through, there is now pressure on the glass from the INSIDE where the blade is now hitting it, which is its weakest side, and it may completely shatter.

    oh... and i wouldn't breath the dust either... glass dust will mess you up.
     
  3. wacken

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    the better way is tieing a piece of cord soaked in petrol around the bottle.burn it and then put the bottle into cold water.You will have a perfect two parts broken bottle.
     
  4. Looker

    Looker Guide

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    I saw this method used to open wine bottles on PBS once. It seemed to work pretty slick!

    Looker
     
  5. Brazito

    Brazito Supporter Supporter

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    Thanks, I'll give that a try.
     
  6. injun51

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    Use a simple glass cutter bought at any hardware store but make sure to use a lubricant on the cutter. Try brake fluid as lube. I was a mirror cutter for a couple of years back in my twenties .
     
  7. bodhran4me

    bodhran4me Supporter Supporter

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  8. zero40484

    zero40484 Scout

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    Ther is a YouTube vid that shows scoring the bottle cleanly once, the. Go to the sink have boiling water ready, pour it on the scored area of the bottle then hold it under the cold water that is all that is needed to cause the glass to crack cleanly.

    The vid is whine bottle cutting 30 seconds perfect.
     
  9. RangerXanatos

    RangerXanatos Scout

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    Are you wanting to get the bottom to make arrowheads? Never tried it, but I read that some would put a large nail in the bottle, shake it, and the nail would break the bottom out and leave it round. I would first try it with the proper safety equipment and with a bottle you didn't care if broke or not.
     
  10. RangerXanatos

    RangerXanatos Scout

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    Last paragraph under Step 2:
    From: http://cavemanchemistry.com/oldcave/projects/stone/bottle.html
     
  11. Brazito

    Brazito Supporter Supporter

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    Thanks to all. The score line and hot water/cold water method looks to be the best.
     
  12. bypassoverload

    bypassoverload Scout

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    I used to make glasses out of wine bottles and a tile saw worked great.
    Just keep the saw loaded with water an it will not chip much at all.
    RA
     
  13. hunter63

    hunter63 Bushmaster

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    Actually went to the hobby store and bought a bottle cutter kit.....

    A freiend does the same thing with a turn table form a record player and mounted glass cutter, scores the line then uses a torch to "pop' the score, then fuses the edge.

    With his furnace he make these out of wine bottles....
    [​IMG]
     
  14. Old Philosopher

    Old Philosopher Banned Member Banned

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    I got one of these at a craft store for about $8.00. Score the bottle, heat the score mark by turning the bottle over a candle, then roll the score mark on an ice cube set on a towel. *POP*
    I used to make wine glasses this way out of old beer bottles.

    [​IMG]
     
  15. Jon Foster

    Jon Foster Guide

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    We had a bottle cutter kit as kids. It worked pretty good but we made so many glasses from the bottles on hand our parents got rid of the cutter kit!

    Jon.
     
  16. Ahnkochee

    Ahnkochee Bushmaster

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    Back in the 60s as kids me and my brother made dozens of Coke bottle glasses. That glass cutter went missing one day. I think you just solved our mystery. :4:

    I wish I stashed some of those Coke bottles away now as they seem to have gained a collectors value.
     
  17. Brazito

    Brazito Supporter Supporter

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    Nope, table top decorations for the wedding reception. My one and only is getting married May 26. She wants wine bottles cut at different heights label intact with candles burning inside.
     
  18. Brazito

    Brazito Supporter Supporter

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    What purpose does the lube serve?
     
  19. Old Philosopher

    Old Philosopher Banned Member Banned

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    I would invest in even a cheap commercial cutter. You have a special project, and even they are not fool-proof. I broke a LOT of bottles learning.
    Also, you'll need emery cloth to sand the edges, even if they aren't drinking glasses. The edges can cause a nasty cut just brushing against them.
     
  20. Brazito

    Brazito Supporter Supporter

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    I saw that video, looks to be the easiest. Oh and I love your signature line.:4:
     
  21. wolfy

    wolfy Guest

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    It's supposed to keep the cutter wheel moving along more smoothly and prevents a ragged cutting line.........or so I was told:57:
     
  22. Brazito

    Brazito Supporter Supporter

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    Those are freaking cool!!!!
     
  23. Old Philosopher

    Old Philosopher Banned Member Banned

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    It was suggested to me to use bee's wax on the glass to prevent chipping, but all it did was make the blade skip a lot.
     
  24. wolfy

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    I was told that when that starts you need a new cutter. As for the lube, I used a thin smear of petroleum jelly. I don't know if that's the right thing to use, but it seemed to work:31:
     
  25. Old Philosopher

    Old Philosopher Banned Member Banned

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    Yeah, the wax was probably too hard...too thick a coating? I just accepted a few tiny chips and sanded them out.
     
  26. injun51

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    Makes it so the score doesn't get hot and start chipping at the scored edge. A very big problem when cutting large pieces of mirror or glass.

    I've cut thousands of custom mirrors and glass for high end homes that are willing to pay ridiculous prices for one piece, full wall mirrors.

    Very tricky, dangerous work.

    90% severed my left arm just below the elbow and had to have it sewn back on because of a mirror shattering. Be very carefull.
     
  27. MiddleWolf

    MiddleWolf Guide

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    Anyone remember the old bottle cutting kits sold on TV just like the Chia Pets and the Ginsue knives? You used a glass cutter around the bottle and then this heavy wire tool on a plastic fulcrum to tap around the inside of the bottle at the score mark till it parted neatly if done carefully. If you can get a picture of the kit somewhere with all the talent here, you can fashion one of those tools and go to town. I had one of those kits and it actually did what it was supposed to if patience was used in working around the fracture. I used epoxy to attach the tops on the bottom of the lower piece to make "fancy stemware". One secret was to place the cut of the pieces on emery paper and rub it to a smooth surface. That part would still be what you do no matter how you separate the 2 pieces.
     
  28. hunter63

    hunter63 Bushmaster

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  29. Ahnkochee

    Ahnkochee Bushmaster

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    I used to cut glass professionally for several years (sometimes hundreds of pieces a day) and even had to attend seminars on a couple occasions. What I was told is a thin lube (kerosene recommended by instructor, and used at out shop) somehow keeps the molecules of the glass separate after scoring with glass cutter thus resulting in a cleaner break. Don't know if it's true but it sure worked versus dry scoring the glass. The kerosene seems to have the perfect viscosity for the job.
     
  30. jerseypeach

    jerseypeach Guest

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    Please post some pics of the finished pieces:D
     
  31. Brazito

    Brazito Supporter Supporter

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    Thanks for the offer but I don't need it. Going with the glass cutter and hot/cold water method. Going to attempt odd angles as well as straight cuts.
     
  32. fepony

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    Forget glass cutters. This is sooo easy. Take a string and wrap it around the bottom of the bottle. Then take a small paint brush and "paint" the string with gasoline. Light the string and when it goes out, dunk the bottle in cold water. It will fracture on the string line. I use this method to make my "Hot caps" for the garden.
     

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  33. Bartnmax

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    Score the bottle with a blade or scriber where you want to cut it.
    Then fill it with hot water & allow the bottle to heat up a bit.
    Then rub quickly around the score with a piece of ice.
    9 times out of 10 it will break cleanly at the score.
     
  34. ozrkmtnman

    ozrkmtnman Scout

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  35. Bartnmax

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    Can also be done the other way round.
    Score first, cool the bottle either with ice or in a fridge, rotate the bottle over a flame around the score. Presto, cut bottle.
     
  36. Brazito

    Brazito Supporter Supporter

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    As promised. This isn't all of them I did in one day. I still have more to do, probably this weekend.

    [​IMG]

    Bought a cutter at Hobby Lobby. After scoring the glass I put the portion I wanted to keep in 200 degree water I had in a stock pot on the stove. After the glass heated sufficiently I put it in another stock pot of ice water. More often than not the glass would crack and may or may not break cleanly. Going back to the hot water would finish the job.

    If the glass was thin or had bubbles in it it wouldn't break cleanly. Some were salvageable, some weren't.
     
  37. Pappy Frank

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    If that is your goal, to make arrowheads from the bottoms, I have done just that. I use a 20d common, insert it head first in the bottle, put your thumb over the opening and shake it one shake at a time. I usually on have to shake them 5-8 times, but have had to go many more on some bottles. The bottom pops off, but can leave a bit of the side on it. Just bop it off then begin shaping the arrowhead.

    If it is for some other purpose, my bad.
     
  38. Old Husky

    Old Husky Tinder Gatherer

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    that petrol tip sounds pretty neat! I have tried to cut through a beer bottle once with my dremel tool with the standard cutting disk and it jsut broke the bottle and scared me a little. I will try that tip though, sounds interesting.
     
  39. Smith the Hunter

    Smith the Hunter Tinder Gatherer

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    Hi every body, also there is an other simple method; pour the some engine oil (also you can apply the black engine oil which is used and not refined) inside the bottle, the surface of oil inside the bottle indicates the cutting edge and then make an iron shaft hot red on a flame then inserting the shaft inside the bottle and you will see the result.
     

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