1976 911 brake line size / diameter ?

[Sharkbitemarky]

As per title

Thanks

Mark T

[Bill Verburg]

Originally Posted by Sharkbitemarky

As per title

Thanks

Mark T

3/16"(4.75mm) w/ M8x1.25 fittings for A, S, & M calipers

[Trackrash]

Bill, are you sure about that fitting size? I read 10 x 1mm in other threads here.

Porsche OEM brake line sizes and fittings?

[KTL]

Yes the tube nuts are M10 x 1.0 size

[Bill Verburg]

newer Brembos & 930 are 10x1.0 for sure, 964 uses 6mm lines w/ M10x1, 993 uses 10mm lines. w/ M10x1 at the calipers and M12 at the m/c

But from my notes 911 uses 4.75mm & M8x1.25 fittings. I'd have to go out to the barn to dig out some old A & M I have there to double check, but it's too cold and I'm too old right now, Mayne someone else has a set handy

Most ATE lines are M10x1 but they do have M6 to M12

[KTL]

I'm certain my Ate calipers for the Carrera (wide A in front, M in rear) are M10x1.0 because i've made my own hard lines with cunifer tubing and Cohline tube nuts. M10x1.0 is the only size i've ever bought.

[Bill Verburg]

Originally Posted by KTL

I'm certain my Ate calipers for the Carrera (wide A in front, M in rear) are M10x1.0 because i've made my own hard lines with cunifer tubing and Cohline tube nuts. M10x1.0 is the only size i've ever bought.

Guess I'll have to change my notes. I wonder why I wrote that down??

Apologies I hit the edit above instead of reply, but didn't actually edit anything

[KTL]

Messing with my replies? LOL

You're forgiven, for all the invaluable insight and info for almost two decades!!!!!! An occasional mistake is bound to happen?

[Sharkbitemarky]

Many thanks, just as a point of clarification it was the hard-line dimensions I was after as I need to make some flanges and wanted to make sure I purchased the correct tooling.

So clarification required: it looks like I have a choice of 3/16" or 4.75mm tooling (Note that 3/16 converts to 4.7625mm) so are 3/16, 4.75 and 4.625 all the same from a 1976 911 hard pipe flange tooling perspective or if I have a choice should I be looking for a specific size of the 3 identified in this post, if Yes, which ?

Cheers
Mark T

[Bill Verburg]

Originally Posted by Sharkbitemarky

Many thanks, just as a point of clarification it was the hard-line dimensions I was after as I need to make some flanges and wanted to make sure I purchased the correct tooling.

So clarification required: it looks like I have a choice of 3/16" or 4.75mm tooling (Note that 3/16 converts to 4.7625mm) so are 3/16, 4.75 and 4.625 all the same from a 1976 911 hard pipe flange tooling perspective or if I have a choice should I be looking for a specific size of the 3 identified in this post, if Yes, which ?

Cheers
Mark T

The hard lines are 3/16", 4/75mm or .188" all are the same, Be sure to use Cunifer a Copper Nickel alloy

[Queefchief]

Originally Posted by Bill Verburg

The hard lines are 3/16", 4/75mm or .188" all are the same, Be sure to use Cunifer a Copper Nickel alloy

Hey Bill, curious as to why to stick with cunifer lines? Curious as im going to redo every line on my car in the near future.

Thank you

[Bill Verburg]

Originally Posted by Queefchief

Hey Bill, curious as to why to stick with cunifer lines? Curious as im going to redo every line on my car in the near future.

Thank you

Combination of rust resistance and ease of formability, SS is also good but much harder to work w/

[KTL]

I'll second what Bill said about ease of formability. The cunifer stuff is REALLY nice to work with. Compared to the typical local auto parts store steel, pre-flared straight pieces, the cunifer tubing is very very easy to bend.

I would also recommend getting a quality flaring tool like the turret style that has become very popular. I have the Eastwood version/copy of the original ingenious design Fedhill offers (they get them from England and rebrand them as their own name) and it makes reliable flares every single time without fail.

007C Brake line flaring tool with 3/16 SAE, 1/4 SAE and 4.75mm DIN punch and die sets

This time of year Eastwood has all sorts of discounts going on. I believe I saw their tool on sale for $149.95 in an email promotion and that is a very good deal. The tool is relatively expensive but worth every penny in my opinion. It pays for itself quickly in its reliability and quick performance.

https://www.eastwood.com/professional-brake-tubing-flaring-tool.html

The cheap split-bar hand flaring tools are junk and don't even waste your time. Making consistent proper, uniform flares with that tool is near impossible and arguably dangerous.

[Sharkbitemarky]

Originally Posted by Sharkbitemarky

Many thanks, just as a point of clarification it was the hard-line dimensions I was after as I need to make some flanges and wanted to make sure I purchased the correct tooling.

So clarification required: it looks like I have a choice of 3/16" or 4.75mm tooling (Note that 3/16 converts to 4.7625mm) so are 3/16, 4.75 and 4.625 all the same from a 1976 911 hard pipe flange tooling perspective or if I have a choice should I be looking for a specific size of the 3 identified in this post, if Yes, which ?

Cheers
Mark T

The answer for a 76 911 is a "4.75mm DIN" flaring tool, this tool will form the correct "DIN (single)" flare. The 3/16 Flaring tool will give you a "SAE (Single) " flare.

Cheers
Mark

[Bill Douglas]

Thanks Mark. That makes sense, a German car is more likely to use DIN (Deutsches Institut Fur Normung) than SAE.