Torque 7nm or 60 inch lbs

So you've prompted me to think about getting a torque wrench tynan. I know I always over tighten everything, not caused me any problems yet but i'm sure it will one day. I'm sat at work so can't check any manuals, what range of Nm do bike parts fit into? A cursary glance on the web suggests a wrench doing tight to broken bike is quite cheap but loose to tight is more expensive. Help me narrow my search.

For most bike stuff (stem bars and steerer clamp/seatpost clamp/seat rails/chainring bolts/caliper mounting bolt etc) - a 1-20Nm should be fine.

For your crank bolts and pedals you would need something that goes up to at least 40Nm.

You can't really get a wrench that covers the whole range, so I have two a 1-20Nm and a 20-110Nm.

There are two sorts of torque wrench, the click sort and the 'beam' sort.

Click = very accurate, expensive, very very easy to set up and use.

Beam = less accurate (but a million times better than guessing), much cheaper, can be calibrated by hand.

Typical bike torques:

http://www.duke.edu/web/intramural/sportclubs/cycling/resources/torquespecs.htm

http://www.bike-manual.com/brands/bontrager/om/BT/torque_specifications.htm