| The Jefa radial quadrants are not made from
cast-aluminium like most other quadrants in the market place. As most
quadrants will also function as rudder stop, one could have enormously
high impact loadings. Cast-aluminium is very brittle and could easily
break under these circumstances. All Jefa quadrants are fabricated from
high strength Aluminium 6082 (AlMgSi1 or Duralumin). This material is enormously
strong, whilst retaining high ductility (Jefa Marine produces rudder
shafts from this material). This results in an extremely strong quadrant
arrangement. The quadrants always have twin high precision CNC milled
tracks with deep groove depths and large guide bend radii ensuring a reliable
and long lifetime of the cable. The twin track arrangement offers flexibility
while installing and adds the possibility crossing the cable between the
steering position and quadrant in stead of crossing the cables inside
the pedestal. Two stop surfaces have been integrated in the aft side of the quadrants. When another stop arrangement is required, we can weld one or two stop blocks on a position of your choice. An optional autopilot arm can be welded underneath the quadrant or pointing aft at the quadrant boss. Please click on the picture for a larger view. |
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