Technical Metal brake pipe outside diameter

[puntodad19]

Punto Evo 2010 1.2 8 valve.

Might someone know of the external diameter of the metal brake pipes please ?

Also, I presume DIN type unions and flares rather than SAE ?

The parts suppliers say 10mm X 1 for the Flexi pipes unions....

Thanks....

 

[bugsymike]

Punto Evo 2010 1.2 8 valve.

Might someone know of the external diameter of the metal brake pipes please ?

Also, I presume DIN type unions and flares rather than SAE ?

The parts suppliers say 10mm X 1 for the Flexi pipes unions....

Thanks....

Generally on cars and light commercials brake pipe outside diameter is actually .5 mm although we always used to order it as 3/16ths brake pipe (kunifer in my case as better quality), the brake unions are often 10mm spanner size for the male ones, though just to be awkward the metric unions I have in the photo are 11mm spanner size.
You may just be able to read the Vernier showing .5mm outside diameter on the brake pipe.
Re flares it depends where they are fitted so I always check the old ones before making any new. I used to just call them OP1 or OP2, as that is what was written on the Sykes Pickavant flaring tool dies, the 2 being a double flare (female) and the 1 just the first rounded type if that makes sense.

 

[puntodad19]

What external diameter are the unions please With a pitch of 1mm ?

DIN or SAE flare ?

Picture way too fuzzy...

 

[bugsymike]

What external diameter are the unions please With a pitch of 1mm ?

DIN or SAE flare ?

Picture way too fuzzy...

Exactly as I said , the 10mm refers to the spanner size that fits the nut on the male unions although the metric ones in the photo are actually 11mm spanner size.
The pitch diameter depends on the car so I always have a good selection, but if you are ordering online I can't tell you the pitch on yours for that reason. Some makes of car use a brake cylinder with a large hole 12mm if I recall, but generally most use the standard metric size with most sticking to the type of union I showed in the photo.
I have boxes of various brake pipe unions to cater for most eventualities. I even have a little 1/4 inch diameter brake pipe left over from when I made up new brake lines for a 1947 Karrier Bantan small lorry I had.
Re the Din or SAE in over 55 years in the trade the type of flare was just called male of female /convex or concave OP1 being concave OP2 being convex or in your query SAE or double flare. Basically when making up brake pipes you did a single flare with the OP1 die and then if it needed the double flare you put the second die in the tool to make what is called a SAE or double flare apparently.
Re the fuzzy photo I am over 70 with shaky hands and went out to my garage to take the picture for you and when I expanded it on the PC screen I can read it clearly on the Vernier, are you using a mobile phone picture?

The Sae is commonly known as a double flare. The DIN is a single flare. It depends on whether the union your connecting to is Convex or Concave on its contact / seal face. If Convex you need a Double flare and vice versa for Concave.

 

[puntodad19]

Yep, Tiny phone screen...

Thanks for your help, very much appreciated....

Will venture down my shed tommorrow to check on stuff.

Car will be with me Monday evening for half an hour to check on stuff so I can order bits I don't have.

Sp hand held these days but back on the day was sp vice mounted...

 

[bugsymike]

Yep, Tiny phone screen...

Thanks for your help, very much appreciated....

Will venture down my shed tommorrow to check on stuff.

Car will be with me Monday evening for half an hour to check on stuff so I can order bits I don't have.

Sp hand held these days but back on the day was sp vice mounted...

Sounds like when my daughters want their cars fixing, you are doing them a big favour but they cannot spare it for long enough to do the job, but at the same time if they booked it into a garage it would be there for days and they would have a big bill at the end.
My children are just starting to realise that as I am no longer able to do it.
My old SPs are vice mounted, I haven't got any modern ones, the only time it was a problem was if under a car trying to join a steel pipe and holding the SP tool with a pair of Mole grips at the same time as the steel is much harder to form the flares.

 

[GrandePunto PL]

If you can't tell what's the pipe size (crucial: wall thickness and material type) and flare, don't touch the brakes.

It's 2026. You can (still) buy ALL pipes and hoses for the Puntos. You don't have to DIY a brake lines!

 

[Mike1alike]

If you can't tell what's the pipe size (crucial: wall thickness and material type) and flare, don't touch the brakes.

It's 2026. You can (still) buy ALL pipes and hoses for the Puntos. You don't have to DIY a brake lines!

I think he can't tell just because he doesn't have access to the car now.
So... I think you went a little extreme there.

 

[puntodad19]

Thanks GP but getting the parts is the difficult bit, even from shop4parts !

My first purchase from them took s week to arrive !

I phoned them up to enquire only to find the parts, in stock, that not even been despatched, orderd Monday morning, despatched Wednesday morning, FedEx then sent them north east Instead of South West ffs !

So that buggard the whole job !

S4p want us to do a review ?

Should we be honest ???

Gsf have the parts ( unlike s4p ), have 2 branches locally and can deliver free ( over £25 minimum order ).

Who would you use ?

I will use s4p for fiat specific parts unavailable else where, or if it's more economic to buy from them.

Are the friction surfaces of brake drums and discs ground, or machine turned ???

Much fake Bosch stuff about ??

 

[AnthonyH]

Thanks GP but getting the parts is the difficult bit, even from shop4parts !

My first purchase from them took s week to arrive !

I phoned them up to enquire only to find the parts, in stock, that not even been despatched, orderd Monday morning, despatched Wednesday morning, FedEx then sent them north east Instead of South West ffs !

So that buggard the whole job !

S4p want us to do a review ?

Should we be honest ???

Gsf have the parts ( unlike s4p ), have 2 branches locally and can deliver free ( over £25 minimum order ).

Who would you use ?

I will use s4p for fiat specific parts unavailable else where, or if it's more economic to buy from them.

Are the friction surfaces of brake drums and discs ground, or machine turned ???

Much fake Bosch stuff about ??

Only the big motor factors like GSF and NAPA carry all stock for quick delivery. S4P, Autodoc and the other players like that carry "popular" stock for quick delivery and the rest is not stocked and they buy it in from elsewhere - with the delays you've experienced. You really can't believe S4P when they say items are in stock. I buy early on ebay and send stuff back, or buy late from GSF/NAPA. I only use S4P or Autodoc if i can't get parts from ebay or the bigger motor factors, which is almost never.

 

[AnthonyH]

It's 2026. You can (still) buy ALL pipes and hoses for the Puntos. You don't have to DIY a brake lines!

@puntodad19

Like has been said, why make these when you can just buy them?

https://www.ebay.co.uk/itm/123946378066

 

[puntodad19]

eBay is a scammers paradise, shoddy goods, even fakes, particularly car stuff.

I don't do e bay at all, but the lad did get a strimmer carb kit from china. How they can sell that kit for the £6 or so delivered is beyond me.

I have mentioned a fake eBay transit bottom ball joint that failed 2 days after being fitted. Thankfully it failed in Tesco car park and not on the A55. Whole family on board when the failure happened.

If you have the kit and experience, making up brake pipes is easy, quick and often saves days waiting for stuff....

Gp makes a fair point, but what size pipe, flare and union used on a citroen bx for instance ?

Easy if the car is in front of you.....the lads fiat is not, 5 years ago it was, that was then, this is now.

Still hunting the old parts from 5 years ago.....they seem to have gone AWOL....

As to just buying stuff, just buy a new car.....?