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Minimum number of teeth and minimum diameter
Drive without reverse bending
• Timing pulley z
min
= 15
• Idler running on belt teeth d
min
= 60 mm
Drive with reverse bending and double sided belt
• Timing pulley z
min
= 20
• Idler running on belt back d
min
= 60 mm
rpm
[min
-1
]
M
spez
[Ncm/cm]
P
spez
[W/cm]
rpm
[min
-1
]
M
spez
[Ncm/cm]
P
spez
[W/cm]
rpm
[min
-1
]
M
spez
[Ncm/cm]
P
spez
[W/cm]
0
1200
3400
20
1300
3600
40
1400
3800
60
1440
4000
80
1500
4500
100
1600
5000
200
1700
5500
300
1800
6000
400
1900
6500
500
2000
7000
600
2200
7500
700
2400
8000
800
2600
8500
900
2800
9000
1000
3000
9500
1100
3200
10000
Tooth shear strength
Other widths are available on request
ELA-flexSD
™
Technical data
Belt width [inch]
Allowable tensile load [N]
Weight [kg/m]
0,50 0,75 1,00 1,50 2,00 3,00 4,00 6,00
1220 1820 2430 3640 4850 7260 9680 14520
0,05 0,08 0,10 0,15 0,20 0,30 0,40 0,60
Belt characteristics
• Truly endless polyurethane timing belt with steel
tension cords and trapezoidal tooth profi-
le
according to DIN/ISO 5296.
• Imperial pitch 3/8” = 9,525 mm
• Mainly used in applications where inch pitch is
an advantage
• Transmissible power up to 20 kW
• Rpm up to 10.000 [1/min]
• Maximum width:
150 [mm]
• Width tolerance:
±0,5 [mm]
• Thickness tolerance:
±0,2 [mm]
Flexibility
5,852 0,000
5,673 0,119
5,518 0,231
5,383 0,338
5,266 0,441
5,165 0,541
4,789 1,003
4,516 1,419
4,304 1,803
4,131 2,163
3,984 2,503
3,857 2,827
3,744 3,137
3,644 3,434
3,553 3,721
3,470 3,997
2,441 8,689
2,388 9,000
2,336 9,295
2,288 9,581
2,177 10,258
2,077 10,874
1,986 11,437
1,903 11,953
1,827 12,433
1,755 12,867
1,689 13,263
1,627 13,626
1,569 13,965
1,513 14,258
1,461 14,537
1,411 14,779
3,393 4,263
3,321 4,521
3,256 4,774
3,230 4,871
3,194 5,017
3,137 5,255
3,082 5,486
3,029 5,709
2,980 5,930
2,933 6,143
2,845 6,555
2,765 6,949
2,692 7,330
2,623 7,689
2,559 8,039
2,498 8,371
L
The total power “P” and the total torque
“M” transmitted by the belt, are calcula-
ted with the following formulas:
P [Kw] = P
spez
•
z
e
•
z
k
•
b / 1000
M [Nm] = M
spez
•
z
e
•
z
k
•
b / 100
Z
e
=
P
= power in Kw
M
= torque in Nm
P
spez
= specific power
M
spez
= specific torque
z
e
= number of teeth in mesh of
the small pulley
z
emax
= 12
z
k
= number of teeth of the small
pulley
b
= belt width in cm
A
= centre distance [mm]
( )
⎥
⎥
⎦
⎤
⎢
⎢
⎣
⎡
⋅π⋅
− ⋅
⋅
⋅
A 2
z z t
arccos
180
Z
k
g
k