How hot do coil legs get?

[smifee]

I'm having some silicon grommets made for Nautilus coils. They are a part that I haven't been able to source for rebuilding the coil heads. They don't last because the coil legs burn into the rubber.

2 pieces were supplied to test and have been used for 4 weeks. On inspection today they both have grooves from the heat of the coil legs and scorch marks.

The material is silicone grade 80 which is supposed to be OK up to 450°F.

[GunJack]

Dec 13, 2016 11:18:02 GMT smifee said:

I'm having some silicon grommets made for Nautilus coils. They are a part that I haven't been able to source for rebuilding the coil heads. They don't last because the coil legs burn into the rubber.

2 pieces were supplied to test and have been used for 4 weeks. On inspection today they both have grooves from the heat of the coil legs and scorch marks.

The material is silicone grade 80 which is supposed to be OK up to 450°F.

dunno what temp, but its the same issue in kanger heads... the silicon seem ok for ages, but the white rubber/plastic ones seem to burn very quickly even when using nr-r-nr coils

[smifee]

Hi GunJack

Don't do many Kanger recoils these days but I found tearing also a problem. That's why I went for a stronger silicone grade.

You've peed on my bonfire though. My next step was to get someone to make me NR/R/NR 2mm, 27 gauge, 1.4Ω coils.

[drunkenbum]

Trouble is that the heat is concentrated in one spot. According to the literature I have next to me at work silicone is actually only good for just over 200 degrees c.
The max temperature can only ever be a rough estimte because there are many differing factors.
When the tests are done it is just a test button of the rubber exposed to the temperature for a certain period of time which isn't accurate to the actual use of the seal or the finished product

[GunJack]

Dec 13, 2016 11:59:56 GMT smifee said:

Hi GunJack

Don't do many Kanger recoils these days but I found tearing also a problem. That's why I went for a stronger silicone grade.

You've peed on my bonfire though. My next step was to get someone to make me NR/R/NR 2mm, 27 gauge, 1.4Ω coils.

They will still be better mate, especially with silicon, its just the white rubber/plastic ones that are cwrp...

[prr]

Look at this on eBay www.ebay.com/itm/110876809342

smifee the smaller grommets fit the protank and the larger the nautilus, hope thishelps

[smifee]

Dec 13, 2016 14:55:10 GMT prr said:

Look at this on eBay www.ebay.com/itm/110876809342

smifee the smaller grommets fit the protank and the larger the nautilus, hope thishelps

I've seen them before, I think on your recommendation, but as I can't tell what they are made from I wouldn't buy. 

I've still got a load of silicone ones for Kanger coils.

For the Nautilus BVCs I want the grommets to have the 2 lugs that locate in the grooves on the bottom of the coil head. The 2 test pieces don't have them and liquid leaked from there.

I recoil for 10 people who get their liquid from me. I started giving them wicking tape for them to rewick but only 2 of them do it successfully. Now I give the others ready wicked coils and they swap used for rewicked when they collect their liquid. Unlike us hobbyists they don't deal with flooding very well. So I'm trying to get leaking/seepage to the minimum. 

[GunJack]

smifee have a look on fasttech for pre-made nr-r-nr coils, get all mine from there

[smifee]

Dec 14, 2016 8:43:10 GMT GunJack said:

smifee have a look on fasttech for pre-made nr-r-nr coils, get all mine from there

I've looked until I went cross eyed.

 

The coils have to be 2mm , 27/28 gauge, 1.4Ω to 1.8Ω.

[charliehorse]

smifee are these any good - pack of non-res-non wires 1.6 ohm

www.fasttech.com/products/0/10018512/3832001-pre-made-welded-nr-r-nr-resistance-wire-for-rba

[smifee]

Dec 14, 2016 15:56:24 GMT charliehorse said:

smifee are these any good - pack of non-res-non wires 1.6 ohm

www.fasttech.com/products/0/10018512/3832001-pre-made-welded-nr-r-nr-resistance-wire-for-rba

Thanks for looking. I did get these hoping they would be ok for 2mm but they weren't.

[charliehorse]

Dec 14, 2016 16:48:29 GMT smifee said:

Dec 14, 2016 15:56:24 GMT charliehorse said:

smifee are these any good - pack of non-res-non wires 1.6 ohm

www.fasttech.com/products/0/10018512/3832001-pre-made-welded-nr-r-nr-resistance-wire-for-rba

Thanks for looking. I did get these hoping they would be ok for 2mm but they weren't.

No worries, it was the closest I could find. Maybe someone else will come up with something

[GunJack]

Dec 14, 2016 16:48:29 GMT smifee said:

Dec 14, 2016 15:56:24 GMT charliehorse said:

smifee are these any good - pack of non-res-non wires 1.6 ohm

www.fasttech.com/products/0/10018512/3832001-pre-made-welded-nr-r-nr-resistance-wire-for-rba

Thanks for looking. I did get these hoping they would be ok for 2mm but they weren't.

Did you try widening out a pre-made coil with a needle/mandrel etc.? Maybe unwinding one turn to allow for the extra diameter....just a thought

[smifee]

Dec 15, 2016 1:00:23 GMT GunJack said:

Dec 14, 2016 16:48:29 GMT smifee said:

Thanks for looking. I did get these hoping they would be ok for 2mm but they weren't.

Did you try widening out a pre-made coil with a needle/mandrel etc.? Maybe unwinding one turn to allow for the extra diameter....just a thought

The internal diameter has to be 2mm for the wicking tape I use.

I tried using a Zapper to make my own NR/R/NR coils but every time it zapped I jumped and it all fell apart.

[GunJack]

Dec 15, 2016 9:21:10 GMT smifee said:

t every time it zapped I jumped and it all fell apart.

[/p][/quote]



that made me laugh