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Fairbanks Ignitor Insulation


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  #1  
Old 05-23-2018, 05:43:22 AM
crashley crashley is offline
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Default Fairbanks Ignitor Insulation

Hi where can I but a mica tube 1/4 x 1/2 x 2" to suit a 3hp fairbanks morse ignitor ( preferably in australia)
thanks
ashley
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  #2  
Old 05-23-2018, 06:07:38 AM
Michaely Michaely is offline
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Default Re: fairbanks ignitor insulation

Hi

suggest making the tube and other insulation out of Teflon round. You can buy this in round in various diameters. Lathe required or a mate with one.

Mike
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  #3  
Old 05-23-2018, 04:11:57 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: Fairbanks Ignitor Insulation

if you do not find a local source - Not down under but Both Lee Pederson and H&M Enterprises have the mica you need. They are both sponsors here on the Stak. I know Lee ships overseas quickly.
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  #4  
Old 06-05-2018, 10:00:27 PM
Nathan Woodruff Nathan Woodruff is offline
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Default Re: Fairbanks Ignitor Insulation

I have known people to use mica washers out of toaster and stack them together. It works quite well and usually free to obtain.
Regards, Nathan
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Old 06-07-2018, 04:59:37 AM
Brock Summerfield Brock Summerfield is offline
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Default Re: Fairbanks Ignitor Insulation

I have been using Teflon bar for years never had a drama most engineering supply shops should have it , if you have dramas getting it M&G industrial supplies in fyshwick ACT has it on the shelf
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  #6  
Old 06-07-2018, 03:15:47 PM
EMU EMU is offline
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Cool Re: Fairbanks Ignitor Insulation

If you are going to do it , do it right . Try Ebay .

---------- Post added at 05:13:29 AM ---------- Previous post was at 05:05:04 AM ----------

Ebay , Seller ID , zkstuff .... Flywheel Supply . They only come in 1-3/4 inch long. Which will be ' ok '.

---------- Post added at 05:14:34 AM ---------- Previous post was at 05:13:29 AM ----------

I ordered
5/16 ID 3/8 OD Mica Tube For Ignitors Hit & Miss Gas Engine Motor Fairbanks and Stover .

---------- Post added at 05:15:47 AM ---------- Previous post was at 05:14:34 AM ----------

Be smart GST , applies soon to purchases , under $1000 .
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  #7  
Old 06-08-2018, 04:02:18 AM
EMU EMU is offline
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Cool Re: Fairbanks Ignitor Insulation

That's 10% GST on the purchase price , and 10% GST for Ebay service . 1st July .
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Old 08-30-2018, 06:52:03 PM
Phil60 Phil60 is offline
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Default Re: fairbanks ignitor insulation

I used Teflon on a Oil Pull, worked for a while. What works better?
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Old 08-31-2018, 06:15:58 AM
EMU EMU is offline
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Cool Re: Fairbanks Ignitor Insulation

The problem with Teflon , is that it Carbon contaminates it . Mica is the only solution .
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Old 08-31-2018, 04:36:12 PM
Scotty 2 Scotty 2 is online now
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Default Re: Fairbanks Ignitor Insulation

Hello all
So what happens to the mica so that it has to be changed?

Cheers Scott
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Old 09-01-2018, 07:58:01 AM
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Elden DuRand Elden DuRand is offline
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Default Re: Fairbanks Ignitor Insulation

I -think- that mica absorbs carbon/oil and turns into a resistor. The longer it absorbs, the lower the resistance is, eventually lowering it enough that spark is reduced or eliminated.

I also -think- that Teflon (PTFE, which is good to 600F +) should be fine if the taper seal is good. With no leakage, there is no oil/carbon to contaminate the PTFE.

PTFE can be fit with zero or slight minus clearance, which will help the sealing.

With PTFE, there is no need for oil. It's self lubricating.
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Old 09-01-2018, 03:16:13 PM
Scotty 2 Scotty 2 is online now
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Default Re: Fairbanks Ignitor Insulation

Thanks Elden. That precisely backs up what I've read and been told by users.
We have one ignitor that has the teflon treatment and it runs like a champ. With the mica I could soak it for a month of Sundays and it would still have a resistance reading of less then a megohm. I admit that the engine has not run for long with the teflon (a couple of days only) but I'm sure time will tell.
So far the other LT engines haven't been used enough to see if the mica will get resistance with the tracking.

Cheers Scott
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  #13  
Old 09-02-2018, 12:46:24 AM
rodneyt rodneyt is offline
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Default Re: Fairbanks Ignitor Insulation

Electrics 101.2 (English)

seems to me we risk creating confusion by poor use of language here,
which can short circuit my wiring and cause sparks...

the carbon contamination adds conductivity, not resistance,
to use the word resistance to describe the problem, it needs to used as a negative:
the carbon contamination causes LOSS of resistance.

to say that an insulator becomes a resistor, as a simple statement is a tautology,
an insulator being an ultimate resistor.
everything (except maybe 'superconductors') is a resistor,
insulators have great resistance,
conductors have minimal resistance,
'resistors' as such, have a predetermined / controlled / measured amount of resistance,
and have their uses in the right places.

another way to state the problem is to use some explaining words:
the carbon contamination causes the insulator to behave more like a mere resistor.
etc etc.

cheers Rod.
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