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Author: Subject: Brake line Metric VS imperial
drt

posted on 25/6/15 at 04:57 PM Reply With Quote
Brake line Metric VS imperial

Dear all,

The atom is still coming along!
Silently, but still…
Now
Those following the build know I have a Saab 93 Master cylinder and MGF uprights/brakes
It works in theory…

But actually the Saab is metric
And the MGF imperial.

I measured up the lines and I think
the saab is a 5mm brake line and a 10mm nipple, the MGF a 4,76mm and euh ?nipple?... Correct?

Now can I get adapters from the one to the other?
Or can I get thread cutting sets to make one ?

thanks !!

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theconrodkid

posted on 25/6/15 at 05:16 PM Reply With Quote
cant see the MG ones being imperial but you never know ?,the dia of the pipes,cant see that being a problem.
if you are stuck for imperial unions,i have some gathering dust in my garage.





who cares who wins
pass the pork pies

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cliftyhanger

posted on 25/6/15 at 05:23 PM Reply With Quote
Pretty sure the MGF is metric? pretty close to imperial, think it is 10x1mm thread?

Brake pipes are usually 3/16"

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drt

posted on 25/6/15 at 05:36 PM Reply With Quote
Really? than I missed

But 3/16" are imperial brake lines, so metric m10*1 nipples (couplings) on an imperial brake pipe ?

It's quite hard as the lines are coated or crusty...
difference between 5mm en 4.7625mm (3/16) is only so small.

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cliftyhanger

posted on 25/6/15 at 05:55 PM Reply With Quote
3/16 used on all cars I have owned, old and new (ish, modern cars don't need brake pipes after 6 years like they used to!)

Bit like all seat belt bolts being 7/16UNF thread, the world over.

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britishtrident

posted on 25/6/15 at 05:59 PM Reply With Quote
All modern brake pipe (with the exception of master cylinder to ABS unit) is same bore it is an SAE spec adopted by DIN. The outer diameter of the pipe varies, MG-Rover used plastic coated pipe SAAB used Kunifer at prior to GM downgrade.

Both cars are metric.





[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]

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40inches

posted on 25/6/15 at 06:14 PM Reply With Quote
quote:
Originally posted by drt


But 3/16" are imperial brake lines, so metric m10*1 nipples (couplings) on an imperial brake pipe ?




Yep! They work fine, most brake flaring tools seem to be Imperial.

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rusty nuts

posted on 25/6/15 at 08:07 PM Reply With Quote
quote:
Originally posted by 40inches
quote:
Originally posted by drt



Yep! They work fine, most brake flaring tools seem to be Imperial.


Most modern ones are metric .
Using a mix of imperial and metric pipe is a bit of a bodge but it works. If it's Good enough for Rolls Royce its's good enough for me .Silver Shadow at least

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motorcycle_mayhem

posted on 26/6/15 at 11:00 AM Reply With Quote
""3/16 used on all cars I have owned, old and new (ish, modern cars don't need brake pipes after 6 years like they used to!)""

I'm just renewing several pipes on the Trans(h)it, which the MoT man was not happy about (and quite rightly too). It's a 2002, the most modern thing I've ever had. Metric steel 10mm fittings (13mm head size) and steel pipe originally fitted, now metric steel 10mm fittings (11mm head size) and 3/16" Kunifer pipe mixture.
Retest next week.

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drt

posted on 29/6/15 at 06:58 PM Reply With Quote
you where most right...

MGF indeed has metric M10*1 on 3/16 pipe...
Saab has it too, except for 3/19pipe with M12 fittings from the brake master to ABS

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