20 replies to this topic

[t@z]

Hi

 

This is probably a stupid trivial question but please humor me.

 

I'm after a rough idea of what thread type mini brake lines use.  i think it is 3/8 UNF? however is this the same all round?

 

the bits im most curious about are

 

• the top banjo of the Master Cylinder on a single line jobbie
• the size thread banjo i need to go through this union down to the lower brake line, and also the thread sizes either connecting end http://tinyurl.com/p6lm35s
• if the bolts need to be convex, concave or flat

Hopefully pretty simple, or if anyone has a useful link to the info i need.

 

Thanks

[nicklouse]

old skool single line every thread is UNF.

 

master cylinder did not have a banjo as original.

[t@z]

old skool single line every thread is UNF.

 

master cylinder did not have a banjo as original.

 

thanks, reason i ask is i'm not running brass lines in some points so i just need to make sure i order the correct banjos and unions etc.

[Spider]

In your case, yes, they are all 3/8" UNF.

 

I'm not exactly sure what you are asking though in regards to the 'bolts' being concave, convex or flat?

 

Do you mean the shape of the tube ends to go in to these fittings?

 

The only Banjo Bolt that was originally fitted (in your set up) was through the fitting for which you put the link to. Essentially it was a flat Banjo Bolt but also had copper washers either side of the fitting. The Banjo Bolt fitted though was also an adaptor, in to which the Brake Light Switch was also fitted.

 

<Edit: I just read re Brass Lines. I don't know about the UK, but they are illegal here (in Aust). We can't even use Copper lines, they and Brass work harden and crack>

Edited by Moke Spider, 09 April 2015 - 08:58 AM.

[t@z]

In your case, yes, they are all 3/8" UNF.

 

I'm not exactly sure what you are asking though in regards to the 'bolts' being concave, convex or flat?

 

Do you mean the shape of the tube ends to go in to these fittings?

 

The only Banjo Bolt that was originally fitted (in your set up) was through the fitting for which you put the link to. Essentially it was a flat Banjo Bolt but also had copper washers either side of the fitting. The Banjo Bolt fitted though was also an adaptor, in to which the Brake Light Switch was also fitted.

 

<Edit: I just read re Brass Lines. I don't know about the UK, but they are illegal here (in Aust). We can't even use Copper lines, they and Brass work harden and crack>

 

woops yeh i mean copper really struggling after the holidays with my brain lol

 

a lot of the stuff i will be buying wont be standard as in going to MS.  In my old set up i had a bango that was flat ended but i noticed that the copper line ends are like the right side of this image, where as my banjo i normally use are flat

 

maybe convex/concave was the wrong terminology 

[Spider]

OK, got ya now.

 

Normally you'd use Tube nuts and then Flare the Tube Ends. Most ends only need a 'Doulble Flare End' but there are 4 on a Mini that need an 'Inverted Flare', they are on the rear trailing arms, where the tubes fit to the flexible lines.

 

I'll dig up some photos.

Edited by Moke Spider, 09 April 2015 - 09:49 AM.

[Spider]

Double Flare

 

 

 

Inverted Flare

 

 

 

Here's a variety of Tube Nuts that are used on a Mini - ignore that on the left, apart from being Brass, they are rubbish!

 

[t@z]

perfect thanks thats what i was noticing when i was looking at the old brake lines, and are they all 3/8 UNF. 

 

do you also happen to know the thread type of the bango that would normally sit in the top of these on the 2 way union, i think its bigger than 3/8 UNF?

 

http://www.minispare...px|Back to shop

Edited by t@z, 09 April 2015 - 10:17 AM.

[nicklouse]

it is the same. as you either fit a standard fitting or the banjo bolt depending on side (or routing).

[Spider]

perfect thanks thats what i was noticing when i was looking at the old brake lines, and are they all 3/8 UNF. 

 

do you also happen to know the thread type of the bango that would normally sit in the top of these on the 2 way union, i think its bigger than 3/8 UNF?

 

http://www.minispare...px|Back to shop

 

I suspect you are maybe getting that idea from the external thread with the nut on it? Those are only for mounting the hose. They have an internal thread, which as Nick has mentioned, is 3/8" UNF for the Hydraulics.

[t@z]

Thanks all, really appreciate your replies.

 

Means i can get it all sorted in one visit without fear of getting the wrong bolts and unions

[carbon]

If you're changing to 'copper' brake lines make sure you use Kunifer type pipe, not copper.

 

Copper is too soft. Kunifer brake pipe is copper alloy, much stronger and won't corrode.

[8mini]

Here's a variety of Tube Nuts that are used on a Mini - ignore that on the left, apart from being Brass, they are rubbish!

Is there a specific place where the long and short male fitting go? I bought a kit but there is 10 short and only 5 long.

Edited by 8mini, 08 March 2024 - 09:36 AM.

[Spider]

 

Here's a variety of Tube Nuts that are used on a Mini - ignore that on the left, apart from being Brass, they are rubbish!

Is there a specific place where the long and short male fitting go? I bought a kit but there is 10 short and only 5 long.

 

 

The short one here is M10 x 1.0. They fit the ports in the GMC167 and the upper port of the Yellow tag Master Cylinders as well as the 4 & 5 Port 'Regulators'. The long one here is 3/8" UNF and fits everything else that needs a Male tube nut.

 

< EDIT: While I have referred to short and long tube nuts here as being metric and imperial, that's nit a universal indicator of which is which. A quick and quite reliable way to check is to use a 3/8" UNF Nut (a new or good wheel nut is perfect) as a gauge. The 3/8" UNF fittings will screw in to the Nut but the M10 x 1.0 won't. I suggest this check as it can be hard to pick them apart by eye. I would suggest checking them all as the 3/8" UNF Tube Nuts will screw in to the M10 x 1.0 threads in the Tandem Masters, but won't have proper full thread engagement. >

Edited by Spider, 08 March 2024 - 05:43 PM.

[Ethel]

Just test fit the fitting before you  flare it on the pipe. Make sure it bottoms with some thread still exposed & there's enough thread engagement.

 

Generally, the depth of thread should equal the diameter, so a 3/8-24 fitting should screw in 3/8. With a pitch of 24 Turns Per Inch 3/8 =9/24, so that's 9 turns.