Technical data T3/8"

1. Tooth shear strength

specific tooth force

Rotational speed n [rpm] Ftspez [N/cm] Rotational speed n [rpm] Ftspez [N/cm]
0 37,4 2000 18,78
20 36,3 2200 18,22
40 35,5 2400 17,71
60 34,5 2600 17,25
80 33,8 2800 16,81
100 33,1 3000 16,40
200 30,7 3200 16,02
300 28,9 3400 15,66
400 27,5 3600 15,32
500 26,4 3800 15,00
600 25,5 4000 14,69
700 24,7 4500 13,99
800 24,0 5000 13,36
900 23,3 5500 12,79
1000 22,7 6000 12,27
1100 22,2 6500 11,79
1200 21,7 7000 11,34
1300 21,3 7500 10,93
1400 20,8 8000 10,54
1500 20,4 8500 10,17
1600 20,1 9000 9,83
1700 19,72 9500 9,50
1800 19,39 10000 9,19
1900 19,08

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] 9,53 12,7 19,1 25,4 38,1 50,8
BRECO T 3/8´´ 630 840 1260 1680 2520 3500

Specific elasticity Cspez [N]:

Bsp: 10[6] = 106

Belt width b [mm] 9,53 12,7 19,1 25,4 38,1 50,8
BRECO T 3/8´´ 15,8*10[4] 21,0*10[4] 31,5*10[4] 42,0*10[4] 63,0*10[4] 87,0*10[4]

Belt weights [kg/m]:

Belt width b [mm] 9,53 12,7 19,1 25,4 38,1 50,8
BRECO T 3/8´´ 0,033 0,044 0,066 0,088 0,133 0,178

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 T 3/8´´ 15 60 20 60