Since I use the best torque wrench available ( made by the German mfg Stahlwille) I do not have these insignificant problems.
Tom Beasley ----- Original Message ----- From: "Henry S. Winokur" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, July 02, 2002 10:31 PM Subject: Re: dry vs. wet torque readings ??? > > Since dry vs wet can vary greatly, any structural bolts that would be > > torqued under my supervision must be done per the AISC Calibrated torque > > wrench method to verify proper tension. But since you people are mere > > peons, not able to fully appreciate a Wilhelm-Skidmore bolt tensioner, I > > would go off the following rule of thumb torque formula: > > > > T=(KDW)/12=foot-pounds > > > > where T= torque > > K=friction factor > > D= Nominal bolt diameter in decimal inches > > W=clamp load in pounds > > K=0.30 for nonplated fasteners, black finish > > K=0.20 for electrodeposited zinc coatings > > K=0.15-0.18 for oils > > K=0.16 for cadmium electrodeposited coatings > > K=0.12 for copper anti-seize compound > > > > Standard practice is to tighten a bolt to 70-75% of the proof load. Proof > > load is the point where a bolt will permanently deform more than 2%. > > > > Let me know if you need any more schooling. > > What we need is ENGLISH not ENGINEERING-EZE. > > Regards, > > Henry S. Winokur > 94 GTS1000, AMA, MRF, > Nationally Certified Riding Instructor > Columbia, MD Ride for Kids Task Force > West Bethesda, MD USA >
