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« on: May 31, 2011, 11:01:12 PM »
kartikmadhira
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Hello Rcindia,
i am bulding a hot wire foam cutter using a 12V/5A transformer. but i need a nichrome wire. i knw guitar string is also good but nichrome is better.can anyone tell me where can i buy it online r does anybody have it.i hope i get replies.
kartik.
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« Reply #1 on: May 31, 2011, 11:16:44 PM »
sundaram
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Just buy the Cheap electric Hot Plate replacement coils for Rs10/- from local electric Shop. It has sufficient  length of nichrome wire for 4-5 hot wire bows of length 4-5ft each. Only Problem is that it is in the form of a coil and needs to be straightened to be used in the bow and when cold it has good tension and takes some effort to straighten.

To straighten it without much effort easiest method, if you have your transformer ready is to fix one end to a vice or the bow itself apply one end of 12 -24 volts and apply other end of the 12-24 Volts to the required length of the other end of the coil with a plier and stretch when it has heated up and connect to the other end of the bow with tension. It is very pliable and expands easily when hot.

If you find that the wire stretched by this method is not absolutely straight due to lack of tension in the bow or due to expanded wire wire under heat, reduce the length of the wire in the bow and increase tension and further when the wire is hot just stretch and drag a metal pin, like a stem of a thick screw driver over the wire two to three time which will straighten the wire absolutely smooth. You will have to reduce the wire again now to increase tension.
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« Reply #2 on: May 31, 2011, 11:20:10 PM »
kartikmadhira
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srry uncle i didnt get u.hot plate replacement coil???.can u come online on facebook and explain. i just sent u a friend request!
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« Reply #3 on: May 31, 2011, 11:33:05 PM »
abhay
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Wrong Brothers



HELLO KARTIK,
just buy a Heater filament of 1000 watts from any electrical shop as said by sunderam sir. further, if u can get a fan regulator, (a chinese one will cost not more than rs25), add in series to the input of transformer.

Just straighten coil wires by stretching and finally rubbing it aroung any wooden corner(like of door)..

Take required amount of wire(not more than 0.5metre ). fix the two ends of wires at some rigid support., providing it at max tension u can(the reason being the wire expands when heated up)

Join the two ends with transformer output.

And u are done. U can regulate the temperature of wires usinng fan regulator..


Note: my brother makes a wooden bow "DHANUSH" using the wires at position of string. It works great.

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« Reply #4 on: May 31, 2011, 11:35:06 PM »
kartikmadhira
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i know the setup man!jst wanted nichrome wire.neways thnx for the filament one!
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« Reply #5 on: May 31, 2011, 11:47:19 PM »
sundaram
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Here are the photographs of the heater filament for you

IMG_20110531_233128.jpg
Re: Wanted Nichrome wire for hot wire cutter setup.
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« Reply #6 on: May 31, 2011, 11:50:11 PM »
kartikmadhira
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Done sir.nd thnx a lot!!!!
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« Reply #7 on: May 31, 2011, 11:56:42 PM »
abhay
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Wrong Brothers



u can also open electric Iron element.Its identical to first two images. the wire you will get will gave a rectangular crossection.

Just go to the shop and ask for 1000 watt heater element(it will look like the last image).

U can also open up a soldering iron element.

  

Mica_Elements_foe_Electric_Iron_Toasters.jpg
Re: Wanted Nichrome wire for hot wire cutter setup.
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« Reply #8 on: May 31, 2011, 11:59:24 PM »
abhay
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sundaramvelar sir,
 please correct me whether these are heating filament or element(which we call generally)..
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« Reply #9 on: June 01, 2011, 12:00:15 AM »
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thnx a lot abhay bhaiyya~
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« Reply #10 on: June 01, 2011, 06:28:05 AM »
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...U can also open up a soldering iron element. 
Is the soldering iron filament made of nichrome? Is it as good as the electric-iron one?
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« Reply #11 on: June 01, 2011, 10:00:35 AM »
sundaram
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Soldering Iron elements are made of very thin Nichrome wires because of their smaller size, which cannot be used on a Bow.

@Abhay, I Think it should be call Heating Element from what I know  Smiley
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« Reply #12 on: June 01, 2011, 10:03:58 AM »
Swapnil
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Sir, exactly what is an 'electric Hot Plate replacement coil'? Is it used in electric-iron? What should I ask the shop-keeper for?
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« Reply #13 on: June 01, 2011, 10:43:05 AM »
sundaram
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Local poor man's Hot Plate available any of the local electrical shop for Rs 100-150/- should look like this

The Brown Color Element is the Nichrome wire.

HOT Plate.jpg
Re: Wanted Nichrome wire for hot wire cutter setup.
* HOT Plate.jpg (78.3 KB, 547x507 - viewed 2786 times.)
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« Reply #14 on: June 01, 2011, 01:17:20 PM »
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Taking out Nichrome wire from heating elements of various appliances is not a good option in my Opinion, One it may not suit the thickness required and second it will work out very expensive.

I bought a spool of Nichrome wire from a local Industrial store that worked out very inexpensive for me and would last for 'N' number of days.
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« Reply #15 on: June 01, 2011, 01:21:14 PM »
sundaram
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Great Idea!!!!

Local product name for what you Bought and Brand name please.
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« Reply #16 on: June 01, 2011, 01:28:16 PM »
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Local name is Nichrome Wire. It comes in spools like those of copper wire. And It do not have have any brand on it. Because it is for Industrial use.

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« Reply #17 on: June 01, 2011, 01:51:59 PM »
Swapnil
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Can one get it in any 'electricals' shop or only a 'local Industrial store' ?
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« Reply #18 on: June 01, 2011, 01:58:10 PM »
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Hi Swapnil,
               I think it should be available in industrial electric stores, as it is used in industrial heater applications.

Nagpur being a industrial city there, should be no problem in getting it, just you have to roam around a bit.

Any ways I can send it for you, if you want it from me.
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« Reply #19 on: June 01, 2011, 02:02:45 PM »
Swapnil
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Darn, I just bought an electric-iron coil 20 mins ago. Bang Head
Anyways, how much does it cost?
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« Reply #20 on: June 01, 2011, 02:07:15 PM »
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hi Swapnil,
               no cost just PM me your address and I shall arrange to post it to you. please also mention length required by you.

Sundaram sir, Kartik if you people also require Nichrome wire please send me above mentioned details.

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« Reply #21 on: June 01, 2011, 02:14:44 PM »
kartikmadhira
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Thnx a lot akshay bhaiya!
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« Reply #22 on: June 01, 2011, 02:17:10 PM »
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Thanks a lot from me too! Thanks
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« Reply #23 on: June 02, 2011, 09:14:20 PM »
Swapnil
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So, here's my hot-wire cutter.
Ripped out the nichrome coil from an electric-iron heater (750 W). Got a straight wire of approximately 2.5m. Took out a 15V transformer from an old cassette player. Initially tested with 1000W air-cooler regulator in series. Works best at max. power.
The alligator clips have flattened jaws. Gonna add a tension adjusting mechanism soon.

It works better than I had expected. Cuts foam like cheese!  Grin
A year ago I tried cutting foam with a cutter blade attached to a soldering iron which didn't work so well. Had been using saw blades since. Now I have a hot-wire cutter too! Grin Grin Grin   

1.jpg
Re: Wanted Nichrome wire for hot wire cutter setup.
* 1.jpg (11.3 KB, 607x406 - viewed 2448 times.)
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« Reply #24 on: June 02, 2011, 10:02:22 PM »
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Nice job Swapnil, Your frame is really nice. How do you made it.

I think you will be needing a spring or two at both ends of your frame to tension, nichrome wire, as it will expand once heated. It will sag and loose it's tension.

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« Reply #25 on: June 02, 2011, 10:13:02 PM »
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The frame was made using wooden 'bidding' sticks. I was gonna add a spring but didn't find a good one.
I noticed that the wire doesn't sag much once heated and the temp. is also perfect. The cut I made in a 3 in. thermo. sheet was straight and smooth. Smiley
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« Reply #26 on: June 03, 2011, 11:27:26 AM »
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Straight cut is no problem, but real test will come when you cut the airfoils and than you would realize that springs are must.
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« Reply #27 on: June 03, 2011, 11:31:23 AM »
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I know, gonna search my scrap-box for a good spring and add it to the setup ASAP! Smiley
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« Reply #28 on: June 14, 2011, 01:41:42 PM »
Swapnil
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Received the nichrome wire today.
It's certainly better than the heating element I ripped out of the electric-iron coil! Gonna try it on my bow ASAP.

Thanks Akshay!  Thumbs Up
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« Reply #29 on: June 14, 2011, 02:15:45 PM »
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It's OK Swapnil, Hope it helps you.

I have tried it with no problems.
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« Reply #30 on: August 07, 2011, 12:12:29 AM »
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hello everyone...
hello,
i am new to this forum,and didnt know where else to post this request..
i always had a dream of building an rc plane,i had attempted when i was in
8th class...failed and ended up making a rc boat instead..
this time after 10 years there are a lot of resources like internet and did
a lot of researching..and it looks like i still have the urge to make one..
anyways i was trying to make one from thermocol..
i want a foam cutting nicrome wire...
i am ready to pay for it and the shipping too...
anybody who has it please help...
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« Reply #31 on: August 07, 2011, 12:29:08 AM »
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ansari saab , solding iron kharido and uske elements me se nikal lo wire, simple.
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« Reply #32 on: August 07, 2011, 12:51:45 AM »
globalmilind
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= Vinnet: Hahaha.... Best solution! LOL!!!! And really easy! I like it... Grin Grin Grin
Hey your texts are humorous too! Though this forum does not allow much humor unlike others and there're thousands of other restrictions where you keep seeing same old words from admin like "Admin Note: XYZ not allowed" etc..etc....  I really don't know why- never mind! Smiley

Anyway, even I tried this element method, it works just GREAT!!!!  Grin
Some people say that guitar strings also do good!
« Last Edit: August 07, 2011, 01:32:33 AM by globalmilind » Logged

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« Reply #33 on: August 07, 2011, 07:26:43 AM »
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http://www.rcindia.org/self-designed-diy-and-college-projects/just-another-foam-slicer/

my 0.02cent and we can use a cantilever arrangement instead of a spring...

Cheers,
Arun
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« Reply #34 on: August 07, 2011, 07:27:17 AM »
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Guys.

pardon my ignorance on posting the link.. pl search for "just another foam slicer" in DIY

Cheers,
Arun

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« Reply #35 on: August 07, 2011, 09:57:50 AM »
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Link updated above to : http://www.rcindia.org/self-designed-diy-and-college-projects/just-another-foam-slicer/
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« Reply #36 on: August 07, 2011, 10:01:32 AM »
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Though this forum does not allow much humor unlike others and there're thousands of other restrictions where you keep seeing same old words from admin like "Admin Note: XYZ not allowed" etc..etc....  I really don't know why- never mind! Smiley

All the mods here have better things to do... but when half the population cannot handle exactly 2.5 rules (not 1000s), we suffer Giggle

What are the 2.5 rules ?

1) Search - Search before posting

2) Post/Topics - Put meaningful topic names, post in the right board and do not quote unnecessarily.

2.5) Language - Do not use SMS language and all capitals.

Are these really that difficult ?
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« Reply #37 on: August 07, 2011, 10:24:17 AM »
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thanks guys for all the help..i realised cutting foam wings is not very easy..
and i will take that up later..i right now will build my plane from cardboard..
hope it works..in fact doing it right now...
and thanks again for all you guys help and quick replies..
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« Reply #38 on: August 07, 2011, 11:03:13 AM »
aditya
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it,s not so hard to cut a foam....
it is very easy...
u can use above mentioned wires for making foam cutter
or use locally available heating element costing you rs. 10.
connect it to 12 or 24 v d.c. supply and it is ready to cut foam...
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« Reply #39 on: August 07, 2011, 11:23:42 AM »
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= Vinnet: Hahaha.... Best solution! LOL!!!! And really easy! I like it... Grin Grin Grin
Hey your texts are humorous too! Though this forum does not allow much humor unlike others and there're thousands of other restrictions where you keep seeing same old words from admin like "Admin Note: XYZ not allowed" etc..etc....  I really don't know why- never mind! Smiley

omg have i again broke any rule ??

milind thats why we are in rc india , not in any other forum, i think we should post hindi language some time.ha ha ha
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« Reply #40 on: August 07, 2011, 01:51:14 PM »
globalmilind
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LOL!!!!!  Grin Grin Grin Grin
Mast hai!  Wink
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« Reply #41 on: March 20, 2012, 05:11:05 PM »
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Taking out Nichrome wire from heating elements of various appliances is not a good option in my Opinion, One it may not suit the thickness required and second it will work out very expensive.

I bought a spool of Nichrome wire from a local Industrial store that worked out very inexpensive for me and would last for 'N' number of days.


Hi Akshayb,

From where did you get the nichrome wire? Could you share the shop details? I also need to get one.
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« Reply #42 on: January 27, 2015, 06:00:20 PM »
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One way to gather a good supply of nichrome is from fishing line wire traces. Deep sea anglers use them on the ends of their fishing lines. I purchased a roll of it from a fishing store on the coast during a holiday and never used it for a dozen years or so. It's not expensive and doesn't have a tight coil to contend with. Even better if you have a few local friends to share a roll together. Mine has been strung for over 4 years and is still as tight as the first day it was used. According to my guitar tuner it's strung in the key of C. Smiley   ...   Stu
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« Reply #43 on: January 27, 2015, 11:34:47 PM »
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@propfella,
Sir, a few days back you said Zee (not Cee)!
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(And please do see your pms too)
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« Reply #44 on: January 28, 2015, 12:35:54 PM »
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I'm aloud to change key aren't I? Anyway the heat we have here tends to put it off key unless I'm continually re-tuning it. Plus I find that when it's tuned to C and I pluck the wire it interferes with our TV owing to the antenna being a resonant length. I'll fit a TVI filter to it when I have time. It wouldn't hurt to fit one to the TV itself as well. The next door neighbour causes havoc when she switches on her hair dryer. It could be a strand of her hair acting as a cat's whisker and generating RF which is amplified even more if she's using her microwave at the same time.

As for checking my pms, I've never suffered from such things and happily my wife has long given up worrying about it. Thank you for asking though. I'll relay the message to my wife, I'm sure she'll appreciate the thought.
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« Reply #45 on: January 28, 2015, 01:25:16 PM »
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Wow!
Mea culpa.
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« Reply #46 on: January 28, 2015, 02:17:54 PM »
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Whatever the heck that's supposed to mean. Any chance of telling us exactly what you mean without disguising it? I see you had no trouble doing so in your previous post. The riddles I can do without Smiley
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« Reply #47 on: January 28, 2015, 02:25:32 PM »
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'The fault is mine'
(Have sent you a private message of apology. Kindly accept)
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« Reply #48 on: January 28, 2015, 02:58:32 PM »
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Although I do not really build from foam much because it causes mayhem while sanding, I've used guitar wire with a UPS battery and it gives great results.
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« Reply #49 on: January 28, 2015, 05:49:30 PM »
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And when you finished cutting foam you used it to serenade you wife or girlfriend, ....  or both Smiley A joke.
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« Reply #50 on: January 28, 2015, 05:50:44 PM »
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All forgotten, I assure you KK.
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« Reply #51 on: July 08, 2015, 12:02:05 PM »
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good online source of nichrome wire

kp
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« Reply #52 on: July 08, 2015, 01:20:53 PM »
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www.ebay.in/itm/Nichrome-wire-Hot-wire-Foam-cutting-10Meters-32AWG-Best-Quality-/181731254965?pt=LH_DefaultDomain_203&hash=item2a5006e2b5
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« Reply #53 on: July 08, 2015, 01:22:00 PM »
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www.ebay.in/itm/Nichrome-wire-Hot-wire-Foam-cutting-5Meters-/181688519156?pt=LH_DefaultDomain_203&hash=item2a4d7ac9f4
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« Reply #54 on: August 29, 2015, 06:58:48 AM »
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A great place to find Nichrome is from fishing leaders. They are the wire leads they use in deep sea fishing. It goes between the hook and a swivel further up the line. It's used to stop big fish from cutting the line.

I purchased just one of them and it has enough Nichrome to build 5 cutters. Mine has been under tension and used for 5 years and it's still as good as new.
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« Reply #55 on: August 29, 2015, 07:00:00 AM »
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Yes I know it's an old topic. but the info I posted will still be valid in 10 years.
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