The polyurethane timing belt


Construction
BRECO , BRECOFLEX AND SYNCHROFLEX TIMING BELTS are made of wear resistant polyurethane and high tensile steel cord tension members. Both high quality materials combined form the basis for dimensionally stable and high resistance polyurethane timing belts. Polyurethane timing belts have a very high span rigidity. No post-elongation of the tension members is to be expected in continuous operation. The belt pre-tension could slightly reduce only under very high loads following a short run-in time, the reason being settling of the tension members, requiring a once only retensioning of the timing belt.
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The production methods according to which BRECO , BRECOFLEX AND SYNCHROFLEX TIMING BELTS are produced, allow keeping within tight tolerances which guarantee a uniform load distribution during power transmission. These polyurethane timing belts are suitable for the transmission of high torques as well as for accurate positioning and conveying of the most varied products.

Note corrections to the permissible load values where deviations from the standard values occur.

Characteristics:
mechanical
  • positive fit, synchronous run
  • constant length, no post-elongation
  • low noise
  • wear resistant
  • maintenance-free
  • highly flexible
  • positional and angular accuracy
  • can be crossed
  • fatigue resistant, low extension steel tension members
  • max. belt speed up to 80 ms-1
  • small build sizes
  • favourable power-to-weight ratio
  • low pre-tension
  • low bearing load
  • permits large centre distances
  • permits large transmission ratios
  • high degree of efficiency, max. 98 %
chemical:
  • hydrolysis resistant
  • resistant to aging
  • temperature resistant from -30° to +80°C (see notes in the text "Construction")
  • tropical climate resistant
  • resistant against simple oils and fats
  • Petrol
  • resistant to some acids and lyes