Great instructional video, mate! Thanks to you, I was able to cut holes into two sheets of glass for a double glassed window to install a cat door! Greetings from Germany!
I have attempted many hole cuts and failed before I discovered your video. Great work. And I see why you need to turn over and 'break the seal' directly after scoring the circle. It stops any cris cross scores following through past the circle score line. Circle cuts are incredibly hard to master and you have made it look so easy.
Yes, I was also looking for an instruction as how to make a decent hole in the glass for a catdoor. This video was just what I needed to get a grasp at the possible issues that an inexperienced person will face when endeavouring the same result.
I like how you gave two metric measurements... 25mm or 2.5cm. Take that America! And using an otto bin as a tool brought an aussie tear of pride to my eye.
There was a big push in the 70's to move towards the metric system in the US, but it lost momentum...now we are left with a idiotic mixture of imperial and metric measurements (we buy 2 liter bottles of coke, but pump a gallon of petrol). Cars that I have owned that I've worked on, I had to continually switch between imperial and metric wrenches - it's really stupid. We and the other 2 imperial measurement countries need to switch...it's quite costly, but will save an untold amount of money in the long run. Thanks for this video, I like your 2 cut method - makes sense.
This is an excellent tutorial and its it’s really going to be a big help to me as I will be installing one of those round Plexiglas doggy doors in a sliding glass door at my mother’s house and I only have one shot at it. The problem is that after 1977 here in the USA all glass patio doors were required to use tempered glass, which of course cannot be cut. My moms door is from the early 70’s and therefore is not tempered, but if I crack it and it has to be replaced the installer would be required by law to use tempered glass, which would mean I could then no longer use this type of doggy door. This is probably why they don’t sell these doors here in the USA (I ordered mine from Australia). By the way, is anyone else here scratching their heads after reading homopunk84’s comments? I mean, I can’t figure out if he is just being sarcastic or if he actually thinks that knowing that 2.5cm is the same as 25mm is somehow some sort of “burn” on the USA. Lets face it, pretty much everyone on the planet with an IQ above 60 knows that the metric system is based on tens and that therefore 2.5cm is 25mm are the same thing (I learned the metric system here when I was 12 years old). Speaking of which, I would actually estimate the difference in radius between the two circles to be closer to 4cm. Anyway, Australia certainly has plenty of things to be proud of - AC/DC and Midnight Oil, just to name a few - but knowing that its best to break glass over a bin, or being able to use 25mm and 2.5cm interchangeably is not exactly anything to brag about.
I have just tried to cut glas for the first time and understand now, that it is more complicated than you think. It's really fascinating how glass reacts to disturbances in the structure.
yes some neat tricks. I am Glazier myself it's nice to see some new tricks I will give that one a shot. there is a lot of people posting videos on how to cut glass and they say they have lots of videos on how to glass that are done by people that don't know what they are doing but this is very clever
OK! Genius!!! :) I have been looking all over RU-vid for this answer! Thank you:) Make a million videos! You did such an excellent job on this one, I can hardly wait to watch the rest of them. I love your accent that you know you don't have;) LOL! BOP
Great video only constructive critism is I wouldn't say push hard . Unless a person knows what pressures you can and can't use on glass can make the glass crack if you push hard. My advice is whay your doing is making the glass running. Basically put your thumbs literally on the glass cut and slight press down and applying pressure slowly and then the cut will crack and then you can simply start make the cut run. As you press down slightly the cut starts to run in front of you and you can follow it around to it meets the start point. You don't have to push hard jist slight push and apply pressure and you will safely keep the cut from breaking. Don't press hard as to much pressure you can break it
great video thank you. We have only one glazier in town that will do it and it seems to be a mission for them and cant do it for weeks, Lame. Glad I watched this now I know to do two circles which is a great idea. Thank you again
Great work you did. In my application I need the ring between the two circles. Could you kindly tell me how to save the ring? and can I do the same in thicker glass sheet, say 1/4" to 1/2"?
I have a glass balcony roof, in which I want to make a man hole so I can clean it. I don’t have access to topside of glass, only the bottom. Can I still make a circular hole in it? If not, could a glazier do it?
Hi mate, great video. I need to put a dog door in. Never cut glass before but pretty handy in general. In your opinion should i try to do myself to save $150 or just get glazier to do it? I'm guessing pretty good chance of breaking the window given it will be first time cutting glass hey?
Ive been in the glass trade 17 years never has it occurred to me to do the double circle. I do this probably once a month and they always shell. Cant wait to get to work too try this tmoz. 🤯
After working with glass since 1980 & still in the industry it becomes 2nd nature & this stuff isn't scary at all. Gloves get in the way on small jobs like this- glasses should always be used but.. Just respect the product & never get grumpy with it or you will lose. ....cheers 🍻🍻 oh and never drink & glaze / cut either ha ha
Hi mate, Thank you for great and clear instructions. Can I use this technique for my sliding door glass which complies with Australian Standard AS 1288:2021? Thanks
AS1288 is toughened glass so existing glass can’t be cut . New toughened glass with a hole 👍 if it’s safety laminated glass it can be done by an old skilled glazier but that level of skill nowadays is rare. So just swap out using new glass thanks 👍
thanx for sharing, could I do this from only the inside? I have to make a hole for my airco on the attic, and I don't have a tall ladder to reach the window from the outside.
Nice. But in the movies the adored bad guys hang upside down on the 44th floor and make one circle cut and then pop it out with a suction cup thingy. As a newly hired apartment manager the owner was showing me how each it is to replace a broken window pane. While doing so he cut himself. For the next 18 months I took out windows with broken glass and carried them to the window glass replacer and then back. I also caused a 4 foot black spark up a wall when I tried to separate two sparking wires with a screwdriver. So I do respect your skills.
Can you buy the circle contraption or did you make it your self? Would really like to have on! Veey good instructions! Thanks the circle cutter? Or did for sharing!
Also the way your doing is the harder way . You don't have to do an inner circle as your more likely to break it that way and it takes far longer. Just cut little squares in the circle and tap it out and make your way to one edge of the cicle once you get there the whole thing drops out. Can be done in 30 to 60 seconds
straight cutting ? to a rectangle size or a shape or hole ? . old glass is, or can be harder to work with but not unless its like 40 years old or has a colour or pattern through it. clear glass under 40 years old should cut ok. use kero on the glass then cut through the kero.
No this went in the bin. Just done this video for RU-vid & to show the manual way of cutting a circle & for DIY information but yes/ toughen the glass afterwards is always recommended for any DIY..
Hi Darryn, I'm planning on having a go at installing a pet door in a lower piece of glass. Only issue is that it is tinted and I don't know if it's 5mm thick. Is it possible to cut through the tinting and score the glass at the same time and if so, is it even worth it since It's probably laminated and as you say it's meant to be 5mm toughened? I was thinking the tinting may help give the glass a little extra strength?? I guess if I stuff it up I will be calling a glazier(possibly Viridian since I'm in Perth) to fit new 5mm toughened glass anyway. So do you reckon it's worth having a go myself? Cheers. Very informative video by the way!
No, stick on tint needs to be removed first. Use circle cutter to mark out the diameter...5mm bigger than the hole size & cut the tint by hand scalpel then remove tint first , good luck. Pull tint off fast like a bandaid and 90% of the glue comes off with the tint. But Make sure you cut through the tint all around ,
Cheers, thanks Darryn. Would you recommend removing the glass panel to cut the hole or leave the glass in place and attempt the cut. I can remove the flyscreen from the window above to help gain access to both sides at the same time...
+David B you'll break the glass on removal & can be don while in place ... Plenty of kero on the glass around the cut circle . Use small piece of sponge . Large circle first . Open cut both side remember the your chances are good if you get that part over
+darryn malpuss Success! Thank you Darryn, couldn't have done it without your video and advice! Amazing how much effort it took to break the inner circle completely out. Was stressing a crack was going to dart across the pane of glass, but it didn't. Cheers!
+David B great mate 👍👍 in my video you will now notice how hard I actually had to hit the glass inner circle. I need to post something new on glass how to
Mike Moynoyxo. , A square requires 4 holes drilled at each crn point with a diameter of 12mm at least. then cut vertical and horizontal to each hole, open cuts both sides. then diagonal cut to form 4 triangles. open both sides again. tap out mess. without a glass saw this is your rough way of doing a power point hole. it will chip a bit. good luck.
Almost ,...use 50 mm between the 2 circular cuts not 25mm & don't push very hard on the glass, push lighter & tap the cut open using a blunt heavy object, like the edge of a tape measure or a ball hammer. but the glass is not as flexible ,so plenty of kero and the first outside cut must be opened from the inside then go outside & open the cut again ... Then proceed. Good luck .
If your putting a hole in already installed glass and its on the sunny side of the building spray the desired cutting area down with your cleaner bottle to equalise the temperature of the glass first and you will have a happy day , one hotter part and it's game over , works a treat cutting flat on the back of a ute tray on a 35° day as well , set your straight edge or circle cutter , spray , wait like a minute or so till the temperature equalises and cut away , if it's your last piece of glass on the truck use the double circle method and the pentagon line approach , it will save a kick in the arse when you go back to the factory to get another piece if your in the trade , works for me and glad to pass tips on to your subs darryn , and nice job mate not a single shell
it can be done but it will break at a later stage. not easy to do ,to hard to achieve for a non glazier. recommend Toughened 5mm glass an swap over the full sheet. laminated glass is very fragile with a hole missing , it is only 2 pieces of 3mm glass. ...
Same process to be used but a bit more kero and more hand pressure required. if the tank is built then manipulating the direction of opening the cut will require more skill. If it's 10 mm glass then a rubber mallet required to open the cut but press the glass then hit as shown.... HitJust behind the open cut to make it go forward 👍
Ravana Brahma Rakshas it can be done but the glass isn't as flexible in a frame, only a job for a really good glazier & if the glass is only 3mm thick in an older home ... Don't bother . I would explain but it's beyond DIY 🌹
fridahmuthoni It can be done but way beyond DIY, I have done it & some really good glaziers can’t do it. So they opt for cutting it in 5 or 6mm glass & get it toughened. But the toughened product is stronger & I would recommend anyhow. Lamy used if you needed it done right now & you were way out of the city. Thanks 🇦🇺
So, beautiful video---shows me that the movie action of zipping a circle with a cutter and popping it out with a suction cup just may be IMPOSSIBLE, eh?
Atanas Shopski gas oil ? Sewing machine oil is to thick & that is thin oil. I mix a bit of kero with sewing machine oil & put that in the glass cutter or on the wheel. Run the cutter down the glass with NO pressure to make a thin line of lubricant then make the cut though the wet line. 👊🏻👊🏻
lenny108 your glass door may have safety glass in it so in most cases you can't. But if it's not safety glass then much the same process - just vertical & requires a little more skill as the glass is harder to flex & manipulate where the opening of the cut direction should follow . Break out the glass mess into a vertical box the other side of the door to retain Most of the fragments & waste. 👍🏼
That's great. Where can I can get that tool or cutter. I would like to cut the square hole for a small dog to go through the glass door that I currently have now. Is it doable or I have to hire someone to do it? I like to do it myself if possible to save money. Thanks for the video.
Hi Darryn. I want to put in a pet door that needs a 267mm circle cut out of a pane that's 550x620 (inside an aluminum frame). It's a fixed bottom window that meets the floor. The house is 30-35 years old. I have called a couple of glaziers and they have told me the glass thickness is only 3.75mm and I need toughened 5mm glass. They say $300+ for the job. What are your thoughts on this? I would love to have the pet door installed there but at this cost I would sooner hack a hole in my security screen and do it there instead. Mate is this worth doing or should I save myself the hassle and just put it on the security screen instead? I would love your feedback. Cheers.
+darryn malpuss cheers mate. Awesome feedback. Perth is on the opposite coastline from me, I'm in Brisbane :-) I'm going to put it in the screen door because it is the cheapest option. Didn't realise there were so many things to consider with a pet door window install but your explanation has made perfect sense of it all. It really does pay to check with the experts.
Great Video! You wouldn't happen to know how I could cut a 3 inch hole out of the center of a table top but keep the rest of it intact? I don't wan't to break off the sides like you do in your video. Thanks!
Lucas Edwards if the glass is an outdoor table top it is probably toughened ? Look for tempered stamp in one of the corners. It is better that this be drilled out by your local glazier -AS LESS BREAKAGE RISK. if it has no stamp. (toughened glass can't be cut or drilled) A very skilled glass cutter could do this in 6mm glass or thinner with very little chipping but it is well beyond the DIY . Thanks for watching & feed back 👍
Thanks for the reply.. it is NOT tempered. I know this as I've already cut the hole. After asking I had a friend dropped off a diamond hole saw bit. I put the glass top in a kiddie pool and filled it with some water. At an angle I carefully started the cut and then with gentle but steady pressure I just let the bit do all the work. It took longer than I expected but no cracks! I then gently sanded down the edge with sandpaper. Now to make some sort of insert to help protect the edge. I do appreciate the reply. In my area they wanted almost $200 just to cut the hole with no warranty given if they break it. It seemed worth the risk in my case.
kim a lot safer than people think. Glass to me is just like paper, 🙂 splinters in the eyes are the worst. Blink & it scratches your eye ball 😁😁 Glasses required but sometimes we get lazy,
Yeh but I know what I'm doing, once you have worked with glass for nearly 30 years it is like working with a piece of wood to me. Safety glasses are on ,that's the main thing.
