ENGINE INSTALLATION
Page ENGINE INSTALLATION-16
Z001007/0_4_September 2007
INSTALLATION INSTRUCTION
5. 16. PROPELLER - THRUST BEARING RESP. STEP BEARING
All reversing gears covered by our product offer are provided with attached axial bearings for the traction and
shearing forces of the propeller shafts. In case of normal load conditions, no other thrust bearings are required.
For very strong loads, e.g. industrial operation on ice, separate thrust bearings may be required. In such cases,
an elastic coupling between reversing gear and thrust bearing is always to be installed in order to avoid axial
tensions between the two thrust bearings.
With a shaft length exceeding the standard size, a separate step bearing is to be installed. The step bearing
cannot take axial forces.
1
thrust bearing
2
elastic coupling
ill. 5/22
2-blade folding propeller to be aplied
on sailing boats
ill. 5/21
2-blade propeller to be applied
on sailing boats
5.15.11. Cavitation
Propellers which have not been computed correctly (e.g. a propeller with a too large pitch) may cause cavitation
(formation of steam bubbles). Cavitation may damage the propeller and occurs in case of a too high underpressure
on the suction side of the propeller.
ill. 5/23