AT20-PAZ BRECO® polyurethane timing belt (open length)

Version:

  • with nylon tooth facing (PAZ)
  • Standard material: TPUST1 (other materials can be requested)
  • Steel tension member
  • Endless joined
  • Minimum length endless joined: 880/1000 mm
  • Preferred delivery in rolls of 50 m
  • Preferred timing belt widths: 32, 50, 75, 100, 150 mm

Note:

  • Please specify shorter dimensions (cut to length) separately
  • Please specify lengths above 50 m separately
  • VA tension member available (Ask for minimum order quantity)
  • Endless joined BRECO® TIMING BELTS (V) see Transport technology
  • In-between belt widths are available

Please consider our warranty.

standard storage goods
Cut to length
[mm]
CAD 50000 CAD
CAD 100000 CAD
CAD CAD

1. Tooth shear strength

specific tooth force

Rotational speed n [rpm] Ftspez [N/cm] Rotational speed n [rpm] Ftspez [N/cm]
0 175 1600 88,264
20 171,733 1700 85,956
40 168,692 1800 83,762
60 165,847 1900 81,673
80 163,175 2000 79,678
100 160,655 2200 75,94
200 149,85 2400 72,494
300 141,179 2600 69,299
400 133,936 2800 66,319
500 127,717 3000 63,528
600 122,268 3200 60,904
700 117,419 3400 58,426
800 113,051 3600 56,081
900 109,077 3800 53,854
1000 105,432 4000 51,735
1100 102,066 4500 46,843
1200 98,938 5000 42,44
1300 96,018 5500 38,437
1400 93,279 6000 34,767
1500 90,7 6500 31,38

The specific tooth force Ftspez is the maximum force N a belt tooth with a width of 1 cm can transmit. This value depends on the rotational speed of the drive pulley. The calculation takes into account each identical carrying values for each meshing tooth. With more than 12 meshing teeth ze is limited to 12.

\begin{align}
F_t&= {F_{tspez} \cdot z_e \cdot b}\\
F_t& = {\text{Tangential force}}\\
F_{tspez}&= {\text{Specific tooth force in N/cm}}\\
b& = \text{Belt width in cm} \\
z_e&= \text{Number of meshing teeth}\\
z_{emax}&= 12
\end{align}

2. Tension cord strength (M) Ftzul [N] (open length)

permitted tensile force of the belt cross-section

Belt width b [mm] 32 50 75 100 150
BRECO AT 20 7200 11200 16800 22400 32000
BRECO SFAT 20 - 11200 16800 22400 -

Specific elasticity Cspez [N]:

Bsp: 10[6] = 106

Belt width b [mm] 32 50 75 100 150
BRECO AT 20 1,80*10[6] 2,80*10[6] 4,20*10[6] 5,60*10[6] 8,00*10[6]
BRECO SFAT 20 - 2,80*10[6] 4,20*10[6] 5,60*10[6] -

Belt weights [kg/m]:

Belt width b [mm] 32 50 75 100 150
BRECO AT 20 0,307 0,480 0,720 0,960 1,423
BRECO SFAT 20 - 0,480 0,720 0,960 -

Pulley width [mm]:

Belt width b [mm] 32 50 75 100 150
BRECO AT 20 40 60 85 110 160
BRECO SFAT 20 - 55 80 105 -

3. Flexibility

Minimum number of teeth, minimum diameter

 

( X ) without contraflexure

 

 

( X X ) with contraflexure

 

Belt type Number of teeth Tension roller Number of teeth Tension roller
  zmin (X) dmin [mm] (X) zmin (XX) dmin [mm] (XX)
BRECO AT 20 18 120 25 180
BRECO SFAT 20 18 120 25 180

AT20-PAZ BRECO® Polyurethan-Zahnriemen (Meterware)