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Minimum number of teeth and minimum diameter
Drive without reverse bending
• Timing pulley z
min
= 18
• Idler running on belt teeth d
min
= 150 mm
Drive with reverse bending and double sided belt
• Timing pulley z
min
= 20
• Idler running on belt back d
min
= 180 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]
1,00 2,00 3,00 4,00 6,00
4010 8010 12010 16010 24010
0,27 0,53 0,80 1,06 1,59
Belt characteristics
• Truly endless polyurethane timing belt with steel
tension cords and trapezoidal tooth profi-
le
according to DIN/ISO 5296.
• Imperial pitch 7/8” = 22,225 mm
• Mainly used in applications where inch pitch is
an advantage
• Transmissible power up to 100 kW
• Rpm up to 5.000 [1/min]
• Maximum width:
150 [mm]
• Width tolerance:
±1,0 [mm]
• Thickness tolerance:
±0,2 [mm]
Flexibility
33,957 0,000
32,889 0,689
31,932 1,337
31,074 1,952
30,306 2,539
29,618 3,101
26,460 5,541
24,554 7,713
23,178 9,708
22,100 11,571
21,213 13,327
20,459 14,996
19,804 16,590
19,224 18,117
18,704 19,586
18,233 21,001
12,904 43,237
12,599 44,855
12,312 46,411
12,040 47,907
11,782 49,347
17,802 22,369
17,405 23,692
17,037 24,975
16,897 25,477
16,693 26,220
16,372 27,430
16,070 28,606
15,785 29,752
15,515 30,867
15,259 31,955
14,782 34,053
14,347 36,054
13,946 37,967
13,574 39,798
13,433 40,509
13,228 41,553
XH
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