T20 BRECO® polyurethane timing belt (open length)
Version:
- Standard delivery length: in rolls of 50 m
- Cut to lengths / lengths > 50 m on request
- Please specify shorter dimensions (cut to length) separately
- Standard material: TPUST1 (further materials on request)
- Steel tension members (standard)
- E tension member and Stainless steel tension member available (minimum purchase amount on request)
- Belt widths: 25, 32, 50, 75, 100, 150 mm (in-between widths on request)
Please consider our warranty.
1. Tooth shear strength
specific tooth force
| Rotational speed n [rpm] | Ftspez [N/cm] | Rotational speed n [rpm] | Ftspez [N/cm] |
|---|---|---|---|
| 0 | 101,5 | 1600 | 49,2 |
| 20 | 98,1 | 1700 | 48,2 |
| 40 | 95,3 | 1800 | 47,2 |
| 60 | 92,8 | 1900 | 46,2 |
| 80 | 90,7 | 2000 | 45,3 |
| 100 | 88,7 | 2200 | 43,6 |
| 200 | 81,2 | 2400 | 42,1 |
| 300 | 75,9 | 2600 | 40,7 |
| 400 | 71,8 | 2800 | 39,4 |
| 500 | 68,4 | 3000 | 38,1 |
| 600 | 65,6 | 3200 | 37,0 |
| 700 | 63,1 | 3400 | 35,9 |
| 800 | 60,9 | 3600 | 34,9 |
| 900 | 59,0 | 3800 | 33,9 |
| 1000 | 57,2 | 4000 | 33,0 |
| 1100 | 55,6 | 4500 | 30,8 |
| 1200 | 54,2 | 5000 | 28,9 |
| 1300 | 52,8 | 5500 | 27,2 |
| 1400 | 51,5 | 6000 | 25,6 |
| 1500 | 50,3 | 6500 | 24,2 |
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] | 25 | 32 | 50 | 75 | 100 | 150 |
|---|---|---|---|---|---|---|
| BRECO T 20 | 3500 | 4500 | 7000 | 10500 | 14000 | 20000 |
Specific elasticity Cspez [N]:
Bsp: 10[6] = 106
| Belt width b [mm] | 25 | 32 | 50 | 75 | 100 | 150 |
|---|---|---|---|---|---|---|
| BRECO T 20 | 0,87*10[6] | 1,13*10[6] | 1,75*10[6] | 2,63*10[6] | 3,5*10[6] | 5,0*10[6] |
Belt weights [kg/m]:
| Belt width b [mm] | 25 | 32 | 50 | 75 | 100 | 150 |
|---|---|---|---|---|---|---|
| BRECO T 20 | 0,184 | 0,236 | 0,368 | 0,552 | 0,736 | 1,095 |
Pulley width [mm]:
| Belt width b [mm] | 25 | 32 | 50 | 75 | 100 | 150 |
|---|---|---|---|---|---|---|
| BRECO T 20 | 32 | 40 | 60 | 85 | 110 | 160 |
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 20 | 15 | 120 | 25 | 120 |