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The values given in the load table are
based upon uniform, smooth operation, and
reliable grease lubrication.
Since, in practice, the applications are
very diverse, it is necessary to take the
given conditions into consideration by
using appropriate factors SB ,
KA, and fn (see
below).
Formula for determining the torque
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The condition T2permit. > T2req.
must be meat
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Load
factor KA
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Drive
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Type
of load from the
machines to be
driven
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uniform
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medium
shocks
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heavy
shocks
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uniform
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1,0
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1,25
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1,75
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light shocks
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1,25
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1,50
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2,00
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medium shocks
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1,50
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1,75
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2,25
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Safety coefficient SB
The safety coefficient should be
calculated in based on experience (SB
~1,1 ÷ 1,4).
Service-life factor fn
taking into consideration the peripheral
speed of the pinion, the lubrication, and
the stiffness of the pinion support.
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Service-life
factor fn
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Bearing
distance
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1
x tooth width
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2
x tooth width
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Lubrication
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cont.
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daily
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monthly
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cont.
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daily
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monthly
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Peripheral
speed
of gearing
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from 3
to 10
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from 3
to 10
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m/sec.
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m/min.
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0,5
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30
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0,85
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0,95
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1,05
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1,15
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1,0
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60
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0,95
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1,10
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1,15
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1,30
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1,5
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90
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1,0
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1,20
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1,20
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1,45
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2,0
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120
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1,05
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1,30
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1,25
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1,60
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3,0
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180
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1,10
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1,5
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1,40
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1,90
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5,0
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300
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1,25
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1,9
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1,55
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2,30
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Lubrication: Our values are
based upon the operating times interrupted
by intervals, which are normal for
servo-assisted drives, and continuous
lubrication. (The values for daily and
monthly lubrication cannot be determined
by calculation and are only
recommendations, which underline the
importance of a good lubrication.) A
proven solution for continuous lubrication
are automatic lubricators. For details,
please see our lubricating
recommendations.
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