Industrial Transmission Belts

ROFLEX Narrow V-Belts

Product description

ROFLEX narrow V-belt are resistant to temperatures and oil, and they are antistatic. The belt core, comprising the rubber compression zone which is resistant to intensive heat stresses and compressions as well as the power transmitting cord, is wrapped in a fabric cover that provides both protection agains external influences and uniform friction against the pulleys.
The ROFLEX narrow V-belt is tolerance stable TS - manufactured and checked to comply with such exacting length tolerances that the belts can be used in matched sets without sorting.

Application

ROFLEX narrow V-belts are used in industrial and agricultural machinery. They are especially suitable for drives with high belt speeds.
Narrow V-belts use up to 50% smaller pulley widths than classical sections, allowing more compact drives.
Since most new drives use universal pulleys, the classical belt can in most cases be replaced with a narrow V-belt, thereby achieving better power transmission and longer belt life.

Standards

ROFLEX narrow V-belts:
ISO 4184, BS 3790, DIN 7753/1, RMA/MPTA IP-22 etc.

Pulleys:
ISO 4183, BS 3790, DIN 2211/1, RMA/MPTA IP-22 etc.

Section Programme



Section
Top
width
[mm]

Height
[mm]
Length
range
[mm]
SPZ / 3V1)
9.7
8
512 - 3550
SPA
12.7
10
732 - 7000
SPB / 5V1)
16.3
13
1250 - 10600
SPC
22
18
2000 - 12500
8V / 25N1)
25
23
10002) - 52002)
1) American RMA sections
2) Effective belt length in 1/10 inch

Section Dimensions

ISO 4184, BS 3790
DIN 7753/1
RMA/MPTA IP-22

SPZ
SPA
SPB
SPC
3V/9N
5V/15N
8V/25N
Top width
W [mm]
9.7
12.7
16.3
22
9
15
25
Datum width
Wd [mm] 
8.5
11
14
19
Section height
T [mm]
8
10
13
18
8
13
23
Datum belt length
Ld Le - [mm]
4
11
16
Inside belt length
Li Ld - [mm]
37
45
60
83
Outside belt length
La Ld + [mm]
13
18
22
30
Min. pulley datum-diameter
dd [mm]
63
90
140
224
315
Weight
[kg/m]
0.065
0.115
0.200
0.350
0.520
Maximum deflection frequency
f [Hz]
100
Recommended maximum belt speed
v [m/s]
42

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