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73
ELA-flex SD
™
Minimum number of teeth and minimum diameter
Drive without reverse bending
• Timing pulley z
min
= 14
• 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
= 80 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
0,056 0,084 0,113 0,169 0,225 0,338 0,450 0,675
Belt characteristics
• Truly endless polyurethane timing belt with steel
tension cords and trapezoidal tooth profile
according to DIN/ISO 5296.
• Imperial pitch 1/2” = 12,7 mm
• Allow to use small diameter pulley
• Mainly used in applications where inch pitch is
an advantage
• Transmissible power up to 30 kW
• Rpm up to 10.000 [1/min]
• Maximum width:
150 [mm]
• Width tolerance:
±0,5 [mm]
• Thickness tolerance:
±0,2 [mm]
Flexibility
9,156 0,000
8,883 0,186
8,647 0,362
8,443 0,530
8,263 0,692
8,107 0,849
7,523 1,576
7,089 2,227
6,753 2,829
6,478 3,392
6,246 3,924
6,046 4,431
5,870 4,917
5,712 5,383
5,569 5,831
5,437 6,263
3,826 13,622
3,741 14,104
3,663 14,573
3,588 15,027
3,412 16,077
3,256 17,049
3,115 17,939
2,983 18,744
2,864 19,494
2,753 20,179
2,650 20,811
2,553 21,385
2,462 21,912
2,375 22,382
2,294 22,821
2,215 23,197
5,318 6,682
5,207 7,088
5,104 7,482
5,063 7,635
5,007 7,864
4,916 8,236
4,829 8,596
4,748 8,949
4,671 9,293
4,596 9,626
4,461 10,277
4,334 10,891
4,218 11,485
4,111 12,054
4,010 12,597
3,915 13,119
H
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