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Old 06-29-2007, 11:42 PM
DiezNutz DiezNutz is offline
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Join Date: May 2007
Location: Maryland
Posts: 5
Quote:
Originally Posted by Mower For Less View Post
Also, on a technical note, just because your impact wrench is rated for 600 lbs., that dont mean it will really put 600 lbs on it...
I basically agree w/ everything you said, I was being more figurative than literal. IIRC my impact is only about 400 lbs forward as well. Of course no impact wrench actually supplies that in actual torque, it's a torque equivalent resulting from the rotational "inertia" imparted to the fastener by the tool. Poor man's impact wrench is a box wrench (or solid breaker bar w/socket) and a hammer, and can perform wonders that alot of straining in the form of pure torque cannot.
I guess my point was really about how you can't really control it all that well. To borrow from your example, if you happen to know your impact is going to give you the equivalent of 200 ft-lbs pretty consistently by beating down on it, exactly how much do you beat down to get 118 ft-lbs (without benefit of a nifty dial gauge)? Or, in the process of not wanting to over-tighten it, you quit before it's actually tight enough? Takes a fair amount of practice/experience with your impact to "feel" that 75% or so yield point, and I'd hate for someone to get overzealous with some King Kong impact and gall threads, maybe even shear a bolt during the learning process (possible, if it had corrosion and/or stress fractures already), or potentially even worse have a blade come loose.
That's where the torque stick gives you the best of both worlds.

P.S.- The golden rule my gearhead buddies and I have used for years is: The correct torque for any fastener is precisely a quarter-turn before it snaps
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