Double flanges in brake lines - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Bernie** · 03-19-2004, 11:49 AM

Does any one have any hints on how to make double flanges in 3/16 brake line ? I can do them in the bigger lines and be successful 75% of the time but the 3/16 defeats me.

cdowns · 03-19-2004, 12:32 PM

i've never found them that difficult to make , the whole secret is having good tools expect to pay 75-100 for a good flaring tool

**Bernie** · 03-19-2004, 12:53 PM

I have a Blue Point kit. I agree that it works much better than a cheap tool. My problem is that the flange on 3/16 is lopsided. Should the end of the line be square or should it be chamferred ?

72sbfs · 03-19-2004, 08:55 PM

I bought a double flaring kit from Auto Zone two weeks ago just to make front brake lines on my 72. Auto Zone will rent you one with just a $25.00 deposit or you can buy it from them for $25.00. This is the first thing I have had to make brake lines for so I thought I would test it out on a few pieces of scrap I had around. Well, after two tries I had two of the worst looking double flares you ever saw in your life. So then I decided to read the directions that came with the kit.
I found out that the key was to make sure that after you cut the tubing that it is COMPLETLY debured on the inside, so I tried it again, perfect.
So I made the lines for the front of my truck and I have good brakes and no leakes.
Check out Auto Zone if you have one close by.

Sorry so long winded.

photoglg · 03-19-2004, 09:06 PM

The snap on tool worked right the first time I tried and it was the first time for me.

JimKshortstep4x4 · 03-19-2004, 09:14 PM

What works best for me is to make sure the tube is cut squarely, chamfer the outside and deburr the inside. I have had tubes that just would not double flair so I have had to toss a tube now and then.

JIm

Southpa · 03-19-2004, 11:41 PM

And make sure you put the fitting on first,

. Kidding aside its not that hard, and the good kits are expensive. If the length is right I will just buy prefab. I borrowed a friend's kit one day to rebuild all my front brake lines and he told me to expect 25% to go wrong. I don't know how he does it but I got it right every time!

bigskiohio · 03-20-2004, 10:18 PM

deburr tubing really well, it hardens when cut so remove some metal . Use wd40 as lube and take it slow

03-19-2004, 11:49 AM	#1
Bernie Senior Member Join Date: Jan 2001 Location: Northern Illinois Posts: 516	Double flanges in brake lines Does any one have any hints on how to make double flanges in 3/16 brake line ? I can do them in the bigger lines and be successful 75% of the time but the 3/16 defeats me. __________________ Bernie

03-19-2004, 12:32 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	i've never found them that difficult to make , the whole secret is having good tools expect to pay 75-100 for a good flaring tool __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

03-19-2004, 12:53 PM	#3
Bernie Senior Member Join Date: Jan 2001 Location: Northern Illinois Posts: 516	I have a Blue Point kit. I agree that it works much better than a cheap tool. My problem is that the flange on 3/16 is lopsided. Should the end of the line be square or should it be chamferred ? __________________ Bernie

03-19-2004, 09:06 PM	#5
photoglg Registered User Join Date: Jul 2001 Location: Oxnard, CA Posts: 143	The snap on tool worked right the first time I tried and it was the first time for me. __________________ 1969 GMC S/B S/S 3" drop

03-19-2004, 11:41 PM	#7
Southpa Registered User Join Date: May 2000 Location: Victoria, BC, Canada Posts: 2,410	And make sure you put the fitting on first, . Kidding aside its not that hard, and the good kits are expensive. If the length is right I will just buy prefab. I borrowed a friend's kit one day to rebuild all my front brake lines and he told me to expect 25% to go wrong. I don't know how he does it but I got it right every time! __________________ 1970 GMC 1500 Custom Original 350/TH350 Victoria, BC, Canada You can wish in one hand and crap in the other. See which one gets filled first.

03-19-2004, 08:55 PM	#4
72sbfs Registered User Join Date: Mar 2002 Location: Newport, NC Posts: 52	I bought a double flaring kit from Auto Zone two weeks ago just to make front brake lines on my 72. Auto Zone will rent you one with just a $25.00 deposit or you can buy it from them for $25.00. This is the first thing I have had to make brake lines for so I thought I would test it out on a few pieces of scrap I had around. Well, after two tries I had two of the worst looking double flares you ever saw in your life. So then I decided to read the directions that came with the kit. I found out that the key was to make sure that after you cut the tubing that it is COMPLETLY debured on the inside, so I tried it again, perfect. So I made the lines for the front of my truck and I have good brakes and no leakes. Check out Auto Zone if you have one close by. Sorry so long winded.

03-19-2004, 09:14 PM	#6
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	What works best for me is to make sure the tube is cut squarely, chamfer the outside and deburr the inside. I have had tubes that just would not double flair so I have had to toss a tube now and then. JIm

03-20-2004, 10:18 PM	#8
bigskiohio Registered User Join Date: Sep 2003 Location: Ohio Posts: 127	deburr tubing really well, it hardens when cut so remove some metal . Use wd40 as lube and take it slow



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