I take it Mrs L doesn't read the forum then?
Why a fixed torque wrench? Something dentisty?
If you don't have a torque wrench, you can use the Grunt scale.
For this the ideal tool length is 10"-you know, one that is just long enough to get four fingers along the length
.
One Grunt=80Nm if applied with a 10" tool.
Therefore a scale of Grunt can be worked out, althought this is non linear:
1/4 Grunt = 40Nm
1/2 Grunt = 60Nm
1 Grunt = 80Nm
2 Grunt = 100Nm
There is also a Ting rating for ratchet spanners. For a 1/4" drive the handle is usually 5", the Ting is about 40-60Nm [1/4 - 1/2 Grunt]. For a 1/2" drive you normally get a Ting at 110Nm on a 8" handle.
The Ting is usually followed by the Swear as you have just buggered up another ratchet spanner.
you see the grunt scale is not quite working for us when we screw a patient ( i maent this literaturely not what you think you sick b#^%$%^ )
as the bone would break much earlier then only 1/4 grunt. So we have to screw carefully not like you mechanics who can wanke teh srews in.