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Discussion Starter · #1 ·
I have just bought a new torque wrench and have a question about the graduation markings on the barrel. One set is headed ft lbs Which I am Ok with. The other is headed M Kgs, which I although reversed, is Kilograms Metres. What I don't understand is above this scale it is marked (da N.m). What does that mean?
 

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Discussion Starter · #4 ·
I realise that Nm is Newton Metres. What I can't understand is why the legend (da Nm) is immediately above the Kilogram Metre scale. I didn't think Nm & Kg M were the same, at least not according to the conversion chart supplied with the wrench.
 

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Hold on to your hats. Here comes the Physics.

The kilogram is a unit of mass. The Newton is a unit of force.

From your schooldays, you may remember:

Force = Mass x Acceleration​

where the acceleration 9.81 ms^-2, which is approximately 10.

So 1 Newton = 10 kg and 1 kg = 0.1 Newton

What it boils down to is that 1 kilogram meter is roughly equivalent to a tenth of a Newton meter, which can be abbreviated to 1 deci (not Deca) Newton meter.

Brit twin had the right idea, but the wrong way round. :p
 

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Hold on to your hats. Here comes the Physics.

The kilogram is a unit of mass. The Newton is a unit of force.

From your schooldays, you may remember:

Force = Mass x Acceleration​

where the acceleration 9.81 ms^-2, which is approximately 10.

So 1 Newton = 10 kg and 1 kg = 0.1 Newton

What it boils down to is that 1 kilogram meter is roughly equivalent to a tenth of a Newton meter, which can be abbreviated to 1 deci (not Deca) Newton meter.

Brit twin had the right idea, but the wrong way round. :p
1.0 NM = 0.1 daNM = 10 dNM (deci Newton Meter).

1 kgf.m = 0.9807 daNM = 9.8067 NM.

what I said was, in fact, correct. can you not count?

Get it right!
 

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A Kilogram Force-Metre (kgf-m) is a unit in the category of Torque. It is also known as kilogram force metre, written as kg-m or m-kgf. It can be converted to the corresponding standard SI unit N-m by multiplying its value by a factor of 9.80665. So it's roughly 1 kg-m=10 Nm. (a Deca newton or 10 Newtons).

1 Nm= 0.74 Lbs/ft

Good converter here.
 

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Discussion Starter · #10 ·
Thanks guys, I understand it now. I didn't want to shear off any nuts:) Back in the day when I used to wrench on my old bikes we didn't have all this metric stuff, now ft Lbs I understand!!
 
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