Technical data STD8M

1. Tooth shear strength

specific tooth force

Rotational speed n [rpm] Ftspez [N/cm] Rotational speed n [rpm] Ftspez [N/cm]
0 67,620 1900 35,112
20 66,444 2000 34,429
40 65,354 2200 33,151
60 64,338 2400 31,973
80 63,386 2600 30,880
100 62,491 2800 29,862
150 60,464 3000 28,909
200 58,678 3200 28,013
300 55,641 3400 27,168
400 53,116 3600 26,367
500 50,957 3800 25,608
600 49,070 4000 24,884
700 47,394 4500 23,216
800 45,887 5000 21,715
900 44,517 5500 20,351
1000 43,263 6000 19,100
1100 42,105 6500 17,946
1200 41,031 7000 16,875
1300 40,028 7500 15,875
1400 39,089 8000 14,938
1500 38,204 8500 14,056
1600 37,369 9000 13,222
1700 36,579 9500 12,433
1800 35,827 10000 11,684

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] 10 15 20 30 50 85 100
STD8M-HF 650 975 1300 1950 3250 5525 6500
STD8M-HP 1200 1800 2400 3600 6000 10200 12000
STD8M-HS 3150 4200 6300 10500 17850 21000

Specific elasticity Cspez [N]:

Bsp: 10[6] = 106

Belt width b [mm] 10 15 20 30 50 85 100
STD8M-HF 2,0*10[5] 3,0*10[5] 4,0*10[5] 6,0*10[5] 1,0*10[6] 1,7*10[6] 2,0*10[6]
STD8M-HP 3,5*10[5] 5,25*10[5] 7,0*10[5] 1,05*10[6] 1,75*10[6] 2,975*10[6] 3,5*10[6]
STD8M-HS 7,95*10[5] 1,06*10[6] 1,59*10[6] 2,65*10[6] 4,505*10[6] 5,3*10[6]

Riemengewichte [kg/m]:

Belt weights [kg/m]:

Belt width b [mm] 10 15 20 30 50 85 100
STD8M-HF 0,0524 0,0786 0,1048 0,1572 0,262 0,4454 0,524
STD8M-HP 0,0622 0,0933 0,1244 0,1866 0,311 0,5287 0,622
STD8M-HS 0,1068 0,1424 0,2136 0,356 0,6052 0,712

3. Flexibility

Minimum number of teeth, minimum diameter

 

( X ) without contraflexure

 

 

( X X ) with contraflexure

 

Belt type Number of teeth Tension roller Tension roller
  zmin (X) dmin [mm] (X) dmin [mm] (XX)
STD8M-HF 16 40,74 60
STD8M-HP 20 50,93 100
STD8M-HS 28 71,3 120