Practical Application of Fasteners
BoK Content Type:
Presentation Slides
Presentation Paper
BoK Content Source:
MainTrain 2014
Original date:
Wednesday, November 19, 2014
Based on past experiences where over 50% of mechanical failures on Toronto Transit subway rail vehicles were related to misapplication of fasteners, this presentation is an overview of training currently provided to rail mechanics. Beginning with an explanation on application of fasteners emphasizing terminology, preload, elastic elongation and friction/lubricant, it follows with a review of experiences over the past 20 years and the resultant current best practices with respect to control of quality, hardened washers, mechanical top locknuts, lubricated installations, fatigue failures, etc. The presentation includes demonstrations using a Skidmore Wilhelm bolt tensioning machine that dramatically shows effect of lubricant on preload.