Maintenance and Installation Instructions Edition 11.07.2006 20 of 30
Calculation formula for steering drive design
The steering drive design is to be calculated as follows:
Steering torque [Nm]:
F
R
= Wheel load in kg (see tech. data vehicle)
b = Wheel width in mm (see tech. data)
µ = Frictional value (depending on ground
conditions and wheel material)
Tractive force of the chain [N]:
k
1
= Thrust factor (empirical values required)
Depending on the damping at the steering stop it is required to consider thrust factors up to 2.5. Pay
attention to dampened final stops enabling to obtain as low as possible tractive forces of the chain so that
small chain sizes can be used.
Chain tensioners are not allowed to be used as steering stop and are
designed for the maximum wheel load and maximum wheel width (See
Technical Data of the Transmission). In case of an excessive steering torque
on the input side this will result in a too high tractive force of the chain.
In this case it is unavoidable that the steering mechanism gets damages!
81.9
µ
•••
=
bF
T
R
Steering
kT
F
Steering
z
1
2
=
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