DIY: Glass Bottle Cutter




About: Innovative Projects, Diy's, Life Hacks

Bottle cutting is a great way to recycle bottles. You can make custom presents like vases, drinking glasses, candle holders and many other things.

Let's have a look at a simple way to make a bottle cutter.

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Step 1:

I varnished a piece of wood I had lying around.

Step 2:

I cut off 2 pieces from a plastic pipe.

I drilled 2 small and 2 big holes in the each pipe.

(Big hole opposite the small one)

I sanded the ends as they were rough-ish.

Step 3:

I drilled 2 holes in a glass cutter and sawed off the handle.

Step 4:

I found a piece of steel (It's from ball bearing drawer runners)

It already had a hole, so I drilled another one.

Then I enlarged top's of the holes with a bigger drill bit.

Step 5:

I screwed the pipes to the wood and attached the glass cutter.

Distance from pipe to pipe will depend. I was measuring it with a wine bottle.

You will need to attach the glass cutter perfectly. It's best to use a test bottle to find the best spot.

When scoring the bottle, you should get a nice line. If there is no line, that means your glass cutter is not touching the bottle or you're not putting the pressure on it.

Speaking about the pressure, you should not apply too much of it.

If you score the bottle and find a lot of glass shavings, you should lover the glass cutter or change its position.

Step 6:

I attached the piece of steel.

Step 7:

I wanted to add an extra feature to this bottle cutter - a ruler.

I cut/bent a steel ruler to the same size as the steel piece.

As one end of the ruler was not pretty, I bent it.

Step 8:

I glued it on top of the steel and put some weights on it.

Epoxy glue was perfect for the job.

Step 9:

I used "L" shape bracket to make a slider.

I put some neodymium magnets on the bracket and used felt to cover it.

If you don't have a felt, you can use furniture sliders.

If you don't use felt or furniture sliders, your ruler's numbers will most likely fade away.

Step 10:

That's it!

Now we have a bottle cutter with a magnetic slider.

Ruler is handy to cut the same size rings.

Step 11:

Bottle can be put on the cutter both ways. With the neck facing the slider or other way round.

Score the line and use your preferred technique to split the bottle in half.

I used candle and ice method.

Heat the line on a candle and cool it with ice.

Repeat the procedure until bottle splits in 2 pieces.

Make sure the slider does not move when scoring the bottle.I first tried to use only a ruler without the steel piece.

Magnets did not hold as strong, so the slider moved a little bit.

Have fun bottle cutting!

2 People Made This Project!


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64 Discussions


2 years ago

The glass bottles are used for storing every type of
drinking stuff just because of glass bottle’s quality is to keep fresh the all
liquid form thinks which is putting on it. Glass bottle will be the good choice
for you when you are gifting the some liquid stuff to your friend this glass
bottle keep fresh the quality and taste of your drink which you are going to be
gift to another one.

Sri Yantra


2 years ago

Excelente, Yo corto las botellas con un método parecido, pero a mano alzada, pero la máquina cortadora que aparece aquí me parece muy buena, así no tengo que utilizar ni cintas ni marcadores y el corte con esta máquina es preciso. OMAR


3 years ago

That is a nice bottle cutter you got there. great idea!


3 years ago

How I "cut" glass bottles: figure out how much oil is required to fill the bottle to the cut line, heat the oil in a container that can take the heat, and can easily pour liquids into the bottle, once the oil is at ~350F (or just below the flash point of the oil) place the bottle on a level surface with a catch pan underneath and pour the oil into into the bottle. The high rate of expansion of soda lime glass and it's poor conductivity make it so the bottom half of the bottle and top half separate with a pop. This does not shatter the bottle because the lower half is at a uniform temperature because of the oil, the top half is at room temperature, so the only place there is significant thermal stress is a circle directly above the oil fill line. if this does not work, try refrigerating or freezing the bottle before pouring the hot oil inside. If the bottle and container the oil was heated in were clean, the oil should still be usable for other things. Use high grit sand paper to git rid of unwanted sharp edges.

I found this out when I tried filtering hot oil into a jar, it needed to be hot in order to go through the filter in a timely manner.

3 replies

Reply 3 years ago

this does not require a glass cutter of any type, but using one could result in cleaner cuts.


Reply 3 years ago

Considering how often I cut glass bottles (never have in 76 years) your system seems better to me.


Reply 3 years ago

It's a big step up from the method i had to use previously, which involved a diamond cutting disk, which had a tendency to break the bottle, it took longer, and the cuts were messier.


3 years ago

No, there will be no short. To get a short, you have to have two different polarities involved. There is only one polarity in the system.

2 replies

Reply 3 years ago

What are you talking about? Must have two different polarities??? Regardless of polarities (in AC there are no polarities just live and neutral) to have a current flow you must have TWO wires live and neutral. If you connect these two together you create a SHORT! So to clarify things when making this loop round the bottle a SMALL gap must be left between the the two ends of the loop. If no gap is left and the ends are joined a short is created and the current WONT go thru' the loop but where the ends join. Current ALWAYS flows thru' the least resistive path in our case on the point of contact and NOT thru' the loop.

This holds true for any circuit AC or DC battery or not.


Reply 3 years ago

Very clearly, I am talking about DC, as this is what automobile batteries provide. Flow is from Positive (+) pole to the Negative (-); at least according to both the chemistry and physics courses I have had. Thus, there are two (2) poles! Kapisch? If this is not so, then why are the battery terminals (=2 poles) labeled (+) and (-)? I agree flow is along the path of least resistance.


4 years ago on Introduction

The easiest way to 'drill' a hole just might be - make a small well in some clay, put in some 100 grit silica and some linseed oil - use a wooden dowel of the size you want

and turn it slowly until it goes through the glass. Orrr - maybe make that little well of 'fire clay' with the well the -exact- size of hole you want. Melt a little lead, enough. Pour it into that little 'well' and see it 'melt' right through the glass. Put some water or oil inside the bottle / jar to 'catch' the molten lead after it gets through the glass. And how about showing the cutting of a 'Pace' hot sauce jar - now THAT makes a great drinking glass (cut right at the center of the top 'swell'). :)

4 replies

Reply 3 years ago

Do you know why the method with molten lead works? Have you tried it yourself?

What puzzles me is that lead melts at about 300°C while glass melts at about 600°C.


Reply 3 years ago

the lead is corroding the lime or other glass, making lead silicate which melts at a lower temperature, than either the lead and the glass. like melting tin and lead, where the melting point is lower than both the tin and lead.

but i am not so sure, the hot lead would not cause the lime or other glass to shatter unless it was borosilicate glass.


Reply 3 years ago

you! just did not really listen did you? i only, explained the process of making lead silicate.

i expressed no indication, of how well this particular process would work. for it to work, the lead has to remain in a liquid state. anytime i have poured hot lead, onto anything it quickly solidifies. and accidently onto glass, it explodes violently. unless the glass, is the same temperature as the molten lead.

pouring hot lead onto any glass other than quartz or borosilicate, is most likely going to shatter the glass. and throwing hot lead, and glass shards.

but it is a scientific fact, that molten lead will dissolve glass and form a lower melting point lead silicate. it takes less energy, to make lead silicate glass.

this is why it was so popular in the medieval ages. even adding soda, calcium, or potassium lime lowers the melting point.

the melting point, of silicon dioxide is just over 1600*C. even adding soda lime, lowers the melting point to just above 900*C.

and most uncolored glass today, is soda glass. adding to much soda, makes glass that dissolves in water aka water glass.


4 years ago

What do you find is the best way to deal with the sharp edges once the bottle is cut?

3 replies