DIY Hot Knife to Cut Plastics

[malcrandall]

Luke your very good to camera and confident. Well done that man!

[herbetone]

I must come from the bad end of town, because plastic was not the first thing that sprung into my mind when I saw hot knife was mentioned 😏 Good video Luke.

[OldMysticFantasist]

Clever! I use an old soldering iron with a standard tip to melt plastic quite a bit, but never thought to put a sharp edge in like that.

[BramleyProductions]

Good and idea And well made! Great video, I could also see a use also for cutting nylon ropes to cut and stop them fraying out being a boater! Kev.

[CanadairCL]

Great idea, maybe use a higher wattage soldering iron to make cutting easier?

[Scorpiomary]

Excellent project Luke.
Good job with your tutorial.

[samuelthomasengardio]

I have a soldering iron that I've used as a heat knife for years, I sharpened the tip into a knife edge with a bench grinder, it works great.

[CalypsoVenusian]

Great idea . although they do sell changeable bits for soldering irons on Amazon I believe that their is a cutting shaped piece.

[believeinjesus]

You can actually buy soldering units that come with an interchangeable knife tip.

[Twistedmetal-qekx]

Very nice! A good addition to the old tool chest. Thanks Luke

[mikebond]

Neato. I’ve got a couple of those horrible cheap soldering irons laying around that I was wanting to do something with. I think I’ll try this. Another idea is to make a little mini solder melting pot. Good job.

[hommerdalor]

evolution: pizza wheel cutter, with an induction coil.
Nice job.

[brt]

Brilliant , time to rename the show , ahhh yes I see it up in lights now , The Robert & Luke Electric Show 🤗😍👍

[jessicag]

4:08 How do you get a cleaner cut? Is it possible with a beginner friendly and easy way?

[Teknopottu]

Usefull tip for soldering iron (pun intended) and nice for you to keep the opening text showing for more than a second for us slow readers 😁

[danielade]

Looks like everybody else is already done it but an extra tip would be to know what the heat level or wattage of the soldering iron is, higher ones will cut thicker and quicker through other Plastics that are thicker as a heads up for you

[lnwolf]

like colin rhenius
stated, a higher wattage iron would be better, or use a butane soldering iron. you can by a assorted tip set for $9, one of them is a blade tip. maybe just grind / sand it a bit to get it sharper??

[jakeqwaninne]

you could just heat the plastic with a heat gun then use a room temp knife and cut rite through the plastic, i do it all the time, your hack is good for more precise stuff that takes more time

[andybaker]

Back of the net again my friend.
As you're using a corded iron, it wouldn't be too inconvenient to add a fume extraction tube, e.g. 6mm diameter, and a repurposed computer/ CPU cooling fan to drag any fumes away from the nostrils.
More of these excellent projects my friend.

[tebbi]

What a wonderful useful idea!...and so simple, why didn't I think of that myself. ..for that, thx for the video