Folks,

I've just bought a torque wrench, my first, and, as such, am a complete novice on how to use one. (I tried yesterday to use it, but didn't achieve that click-sound to indicate that I'd torqued my lawn mower blade correctly. I have to, therefore, work on my technique.) Any tips will be greatly welcomed, wrt proper torquing technique, whatever you can share, such as correct holding of tool, and how much to turn at a time. Should I first finger tighten, literally, the bolt before I use the wrench??

My manual says I should tighten the blade to 45 Nm, which is quite a lot, and it's strange because on the net I've learnt that usually blades are tightened in the 30-35 Nm range. I have a B&G, and am wondering why the Newton Meter bladed-tightening requirement on my lawn mower is so high. Anyone know? Any of you torqued your mower blades to 45 Nm?

Cheers,
RS ;)

Folks,

Anyone here who can advise, give tips, whatever, wrt my post??

I really need to complete my project today, and can't install that blade without correct torque wrench use advice!!!

Thanks in anticipation,
RS:eek:

start with the basics....... what type of torque wrench do you have? On the handle if it is a good one should be a note telling you to "pull here". If you do not pull on the torque wrench in the correct place you might as well use a ratchet because it will not give you an acurate reading. Pull with a smooth even force, sharp quick pulls will give you a bad reading as well. If you are doing this and the torque wrench is a true "click type" and you don't hear it click take it back! What is the torque range of your wrench? Most good wrenchs are only good for the top 80% and the click will be very subtle if you are near the bottom end. ex...range 50 to 250 ft-lbs. click will be real good at 200, alot quieter at 50. If fix torque wrenches for a living, treat it as a precision tool if you have invested any decent coin on it. See alot come in that are just good for scrap because they are treated like the family screwdriver/prybar.

i recommend 40 foot/lbs........any higher, you are running the risk of cracking your flywheel and putting undue strain on your crankshaft