Torque as m.daN ?

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Mandrake
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Torque as m.daN ?

Post by Mandrake »

Hi All,

Some of the Citroen manuals I have specify bolt torques in units of "m.daN". Is this just newton metres ? Or something else ?

For example rollbar droplinks are quoted as "7 m.daN".

Can someone confirm the units ?

Regards,
Simon
Simon

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Post by jeremy »

Don't think so.

1 lb/ft = 1.3558 Nm
1 Nm = 0.73756 lb/ft

Haynes states 32.5 lb ft for drop links (connecting links) which would be 44.06 Nm

Curiously Haynes also quotes kgf m - being 4.5

I haven't a clue!

jeremy
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Post by RichardW »

da is the SI abbreviation for deca, meaning 1/10th, so m. daN is Nm / 10 (with the units reversed - they are French after all!). However, 70 Nm seems awful tight for the drop links! Maybe the French use this as it is similar to kgf m (kilogram-force meter) - they do like to use kgf rather than N (we have some French designed plants here and they quote pressures in kgf/cm² rather than bar, which always has us reaching for our calculators!) :roll: Note that kg to kgf is mutliplied by G (9.81) so kgf is not exactly analagous to N (2% different) (N is kg m / s²) - probably not enough to worry about at the figures we use, and the vaugaries of most torque wrenches.

Confused? I am :?
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Post by AndersDK »

RichardW -

Deca is x10
Deci is 1/10

- according to ISO ?
Now I'm confused :shock:
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Post by Mandrake »

jeremy wrote:Don't think so.

1 lb/ft = 1.3558 Nm
1 Nm = 0.73756 lb/ft

Haynes states 32.5 lb ft for drop links (connecting links) which would be 44.06 Nm

Curiously Haynes also quotes kgf m - being 4.5

I haven't a clue!

jeremy
Me neither !! Glad to see I'm not as stupid as I first thought when I saw these units...

Sorry I should have been more precise. The early model droplinks with the smaller bolts are quoted as "4 m.daN" and the later model ones are 7. Perhaps they are kgf m then ? Or perhaps they are Nm / 10 as Richard suggests ?

Here are some other figures for front suspension from the same page:

Strut top shaft centre nut - 6.5 m.daN
Strut top to body mounting bolts - 2.5 m.daN
Lower balljoint nut - 4.5 m.daN
Stub axle nut - 32 m.daN
Lower balljoint into the swivel housing - 25 m.daN

Perhaps somebody can work out the units from that...

Regards,
Simon
Simon

1997 Xantia S1 3.0 V6 Auto Exclusive in Silex Grey
2016 Nissan Leaf Tekna 30kWh in White

2011 Peugeot Ion Full Electric in Silver
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RichG
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Post by RichG »

Simon,

I found this on a web site:

"6) While observing tightening sequence (step 7 removal) -torque bolts to
5 m.daN (36.25lbs ft) torque nuts to 1.5 m.daN (10.88lbs ft)
7) While observing tightening sequence, one bolt at a time completely
loosen and retighten to 2 mdaN (14.50lbs ft) then turn bolt an additional 180% using the marked socket as reference."

Therefore 1 m.daN = 7.25 lbs.ft = 9.83 Nm (using Jeremy's figures)

Richard
1998 Xantia 1.9TD Estate (Sold - replaced with Skoda Octavia (sorry))
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