The E Steel Cord Tension Member

The E steel cord tension member

Highly flexible tension inserts – the E steel cord tension member

The thinner the single wire, the more flexible the overall tension member! This interrelation led us to develop BRECO® and BRECOFLEX® timing belts with E tension members.

In the E tension member the tension member crosssection is distributed to a lot more thin individual wires and, therefore, the bending fatigues are markedly lower in the individual wires. The advantage of the E tension members is a higher flexibility.

This is especially important, when smaller mounting dimensions for pulleys and tension rollers are required. The minimum number of teeth and/or minimum diameter of the pulleys can be fallen below up to 30% compared with standard tension members.

Timing belts with E tension members are recommended for multi-shaft drive with frequent bends.


  • Thinner individual wires in the steel cord
  • Higher dynamic capabilities
  • Extremely high bonding and bending fatigue strength
  • Smaller pulley and tension roller diameter
  • No correction of the synchronising
    pulleys are necessary

Application information: For intended application under extreme conditions please contact our technical department for advice.

Steel cord tension members (Example):

The thinner the individual wire the more flexible the whole
timing belt.

Available versions:

  • For the pitches AT3 (standard), AT5 (BRECOFLEX standard), AT10, ATP10, T5, T10, T20

Type Drive Value T5 T10 T20 AT3 AT5 AT10 ATP10
Pulley zmin

Idler dmin(mm)

10 12 15 15 12 12 12
18 50 80 20 18 50 50
Pulley zmin

Idler dmin(mm)

15 15 20 20 20 20 20
18 50 120 20 50 80 80