MOTOVARIO
2.8.1 Informations
The value of the admissible radial load (N) is given in the tables relating to the performance of the gear
reducer at issue. It is related to the load applied on the centre line of the shaft and in the most unfavourable
conditions of angle of application and direction
of rotation.
The maximum admissible axial loads are 1/5 of the value of the given radial load when they are applied in
combination with the radial load.
The tables relating to the output shafts give the maximum admissible value. This value must never be
exceeded since it relates to the strength of the case.
Particular conditions of radial load higher than the limits of the catalogue may occur. In this case, call our
Technical Sevice and provide details on the application: direction of the load, direction of rotation of the
shaft, type of service.In case of double extension shafts with radial load applied on both ends, the max.
admissible radial loads must be defined according to the specific running conditions, in this case call our
Technical Service.
The radial load on the shaft is calculated with the following formula:
Fre=(2000*M*fz)/D
≤
Fr1 or Fr2
Fre
(N) Resulting radial load
M
(Nm) Torque on the shaft
D
(mm) Diameter of the transmission member mounted on the shaft
Fr
(N) Value of the maximum admitted radial load
Fr1
-
Fr2
(see relative tables)
fz
= 1,1 gear pinion
1,4 chain wheel
1,7 v-pulley
2,5 flat pulley
When the resulting radial load is not applied on the centre line of the shaft, it is necessary to adjust the
admissible radial load Fr1-2 with the following formula:
Frx=(Fr
1 o 2
*a)/(b+x)
a
,
b
= values given in the tables
x
= distance from the point of application of the load to the shaft shoulder
S Series
/
ATEX
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IEC
TECHNICAL CATALOGUE
2.8 OVERHUNG LOAD
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