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Polyurethane timing belts


BRECO®, BRECOFLEX® and CONTI® SYNCHROFLEX timing belts are manufactured from wear resistant polyurethane and high tensile steel cord tension members. Both high quality materials combine to form the basis for dimensionally stable and high durable polyurethane timing belts. Polyurethane timing belts have a very high longitudinal stiffness and no post-elongation of the tension members is to be expected in continuous operation. Only under extreme loading conditions and as a precausion after a brief run-in, a small loss of tension may necessitate a once-only retensioning.

The timing belts are temperature resistant with ambient temperatures from -30°C to +80°C. However, applications close to these temperatures limits (<-10°C and >50°C), may require adapted dimensioning. For specific temperature ranges, optional belt materials are available; e.g. the CONTI® SYNCHROFLEX GEN III polyurethane timing belt range is temperature resistant up to +100°C. Please contact your mulco partner for this type of application.

The BRECO, BRECOFLEX and CONTI SYNCHROFLEX polyurethane timing belts are manufactured using production methods that maintain very high tolerances to ensure a uniform load distribution during power transmission and precise positioning applications of the combination of both.

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

Mechanical characteristics

  • positive fit, synchronous run
  • constant length, no post-elongation
  • low noise
  • wear resistant
  • low-maintenance
  • highly flexible
  • positional and angular accuracy
  • can be crossed
  • fatigue resistant, low extension steel cord tension members
  • max. belt speed up to 80 m/s
  • 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 characteristics

  • hydrolysis stabilized
  • resistant to aging
  • temperature resistant from -30° to +80°C (see notes in the text "Construction")
  • tropical climate resistant
  • resistant to simple oils, fats and petrol
  • resistant to some acids and lyes