/ Recommendation for a Portable Hot Knife

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Gavin 12 Feb 2020

Hello,

Per the title, can anyone recommend a portable hot knife?  The ropes I am cutting are up to 32mm in diameter, but this has been fine so far by doing in it stages with a normal corded hot knife, so I don't think I need anything really industrial.

Thanks,

Gavin

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Rick Graham 12 Feb 2020
In reply to Gavin:

Gas stove/ blowtorch and an old heavy kitchen knife . This works well on single ropes , larger should not be a problem.

I also have a mini blow torch, ballpoint pen size, about £4 off fleebay , that you can refill with ciggy  lighter gas. That would also make short work of the job, albeit a bit less neatly. It has a 4mm wide, 40mm long flame.

There is also the cavers trick of cutting a nylon climbing rope with a length of thin cord.

Frightening when you first see it done.

Post edited at 13:11
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LastBoyScout 12 Feb 2020
In reply to Gavin:

Bind both sides of the cut with electrical tape (or whip it, if appropriate) to stop it fraying, cut it with a sharp knife and then seal the ends with a lighter?

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Gavin 12 Feb 2020
In reply to Rick Graham:

Thanks Rick.  I am going to have quite a few to cut so the continued reheating of a knife isn't the best solution for me.

I considered the blow torch/gas soldering iron approach and that would be better for me and have seen a couple of options such as those below, but was interested to know what others use.

https://www.amazon.co.uk/Rope-Seal-Toolbox-Hotknife-BLUE/dp/B0091QPLJY/ref=sr_1_7?dchild=1&keywords=butane+hot+knife&qid=1581515528&sr=8-7

https://www.amazon.co.uk/Dremel-Soldering-Interchangeable-Pyrography-Jewellery/dp/B000QGC6XW/ref=sr_1_15?keywords=gas+hot+knife&qid=1581515455&sr=8-15

I'll save the caver's trick for when in extremis thanks!

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Hardonicus 12 Feb 2020
In reply to Gavin:

Just use an empty beer can like everyone else.

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