Technical Manual V-Belts
Special Drives Drive Belts with Aramid Tension Cord
Diagram 6
Diagram 7
Time/extension graph Belt size SPB 2000 Ld
60 50 40 30 20 10 0 0
1
2
3
4
5
6
7
8
9
10 11 12
n tio uc tr co ns co
rd
80
id
70
100
m
80
120
60
ra
90
Speed ratio i > 1.57
A
Running (minutes)
100
Datum diameter of the small pulley dak = 450 mm
Nominal power rating per belt PN (kW)
110
RED POWER II
Aramid cord construction
120
Power rating graph Belt size 8V 2000 Ld Polyester cord construction
130
40
l Po
20
ye
s
r te
co
rd
co
ns
tru
ct
io
n
0
13 14
0
Drive centre distance increase x (mm)
0
25
0
50
0
75
0
0 10
50 500 1 12
0
5 17
00
20
Speed n (rpm)
Test arrangement
This diagram shows, in a direct comparison, the significantly higher power rating of the Optibelt V-belt with the Aramid cord construction.
Sections / Lengths X 1600 N
Raw edge and wrapped Optibelt V-belts and kraftbands are available with Aramid to BS/DIN/ISO and USA Standard RMA/MPTA.
Free drive centre distance
Because of Aramid’s special properties, belts for multigrooved drives must be ordered in sets as the set tolerance is matched to the Aramid tension cord.
d1/d2 = 180 mm n1 = 1750 min-1 Brake load P = 15 kW
In this graph, the belt extension under load (drive centre distance increase) is plotted against time, for both materials. After only one hour, the increase with polyester is already several times that of Aramid.
Section
Lengths and minimum order quantities on request.
Lengths
Range
V-Belts SPZ
≥ 1000 Lw
≤ 3550 Lw
SPA
≥ 1000 Lw
≤ 4500 Lw
SPB
≥ 1250 Lw
≤ 8000 Lw
SPC
≥ 2000 Lw
≤ 12500 Lw
3V/ 9N
≥ 3V 400 / 9N 1016 La
≤ 3V 1400 / 9N
5V/15N
≥ 5V 500 / 15N 1270 La
≤ 5V 3550 / 15N 9017 La
8V/25N
≥ 8V 1000 / 25N 2540 La
≤ 8V 5000 / 25N 12700 La
As per the 3556 La
Kraftbands 3V/ 9J
≥ 3V 500 / 9J 1270 La
≤ 3V 1400 / 9J
5V/15J
≥ 5V 500 / 15J 1270 La
≤ 5V 3550 / 15J 9017 La
3556 La
8V/25J
≥ 8V 1000 / 25J 2540 La
≤ 8V 4750 / 25J 12065 La
Further sections and lengths and minimum quantities on request
Datum length Ld 122
pitch length Lw; outside length = La
Optibelt standard range