Miner TecsPak® Constant Contact (TCC) Side Bearings help minimize railcar life cycle costs by providing exceptional, proven control over the railcar truck instability known as truck hunting. This allows railcars to operate at high speeds with substantially reduced truck and wheel wear.

• Metal-to-metal design assures superior hunting control.
  
  
• Tight tolerance of top cap to housing maximizes energy absorption.
  
  
• Miner's exclusive design eliminates top cap rotation and tipping, providing full benefits of the close tolerance feature.
  
  
• TecsPak® spring provides:
  
  • Increased tolerance on set-up height
    
  • Wheel load equalization in curve negotiation
    
  • Maximum vertical energy absorption for car body roll control
    
    
• Simple design reduces maintenance and inventory costs
  
  
• Models available in appropriate design and preload to match car type

To reduce the stress state of the North American railroad industry, the AAR mandated the use of metal capped constant contact side bearings on all new cars built after 2001.  In 2003, this mandate was modified to specify long travel side bearings.  In 2005, the AAR expanded this mandate to require that all existing tank cars must be equipped with long travel side bearings.  The following article provides insight into why long travel side bearings have become so important to railroad industry's effort to improve railcar operations. http://www.interfacejournal.com/features/07-05/ccsb/1.html