6/21/2013 12:01:00 AM
HEADLINES
IFI Offers Two New
’Critical’ Handbooks
The Industrial Fasteners Institute released two new critical handbooks, one authored and compiled by Bengt Blendulf on mechanical fastening and joining, and the other by Joe Greenslade on how to correctly tighten fasteners.
Torque Book for Fasteners by Joe Greenslade features “all the engineering data in one place to calculate the correct tightening torque for all types of inch and metric fasteners.”
Greenslade answered FIN’s questions about the story behind the torque manual.
How long was your torque book in the works?
“The question of ‘How much torque should be applied’ is the most frequent question I have heard from end users, directly and through suppliers, for the 42 years I have been in the fastener industry,” Greenslade told FIN.
“This has been explained in many publications over the years, but there has never been a single source for all of the variables needed to make the calculations in one document. I have been thinking about this for the past five years, and finally decided that it is time to fill this critical void for the fastener industry.”
Who is the primary audience?
“The ultimate audience is every installer of threaded fastener user in the world. I believe fastener distributors are the link in the chain that fields the question of tightening torque most frequently.”
Did book grow out of specific incidents related to torque, or perhaps multiple IFI member requests for a torque manual?
“This has been a frequent question as long as I have been in the business,” Greenslade told FIN. “The inspiration to finally create this book came from my interest in improving the way I taught this subject in the Fastener Training Institute classes. I found myself explaining the T = KdP classic formula to students and then telling them they had to go to at least three different resource documents to find the variables.”
“As I reflected on that I decided that is too complicated and it made me decide to gather all of the needed variables in one document so more people can answer this question for themselves more easily and more accurately.”
“When composing this book I realized that providing a resource that only addressed how to calculate a suggested tightening torque value for bolts and accumulating the variables data in one place was still an incomplete resource of questions related to tightening,” Greenslade explained.
“The content was expanded to include information on how to determine how much torque has been applied to a completed assembly, what torque to apply to tapping screws, what torque to apply to set screws, how to address galling problems associated with tightening stainless steel bolts, and a brief explanation of alternative means of effectively tightening threaded fasteners other than by measuring torque.
“In the very back of the book are several pages of worksheets indicating which tables contain which variables so the user simply fills in the blanks in the worksheet and uses a calculator to multiply the variable which results in an answer in inch pounds, foot, pounds or Newton meters depending on the last multiple that is applied.”
“This book is a truly unique technical resource for the worldwide fastener industry that is long overdue.”
MECHANICAL FASTENING AND JOINING by Bengt Blendulf $100/copy (US & Canada) + 10% Shipping & Handling $150/copy (outside US & Canada) + 25% Shipping & Handling
TORQUE BOOK FOR FASTENERS by IFI/Joe Greenslade $50/copy + 10% Shipping & Handling (US & Canada) $75/copy (outside US & Canada) + 25% Shipping & Handling
To order visit the IFI website: www.indfast.org. ©2013 GlobalFastenerNews.com
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