270° Radial Quadrants

Jefa radial quadrants

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.

DATA TABLE

Jefa 270° radial quadrants

Part No.Description
QU1527radial quadrant R=150, incl. bore, max. bore = 75 mm.
QU2027radial quadrant R=200, incl. bore, max. bore = 100 mm.
QU2527radial quadrant R=250, incl. bore, max. bore = 100 mm.
QU3027radial quadrant R=300, incl. bore, max. bore = 125 mm.
QU3527radial quadrant R=350, incl. bore, max. bore = 125 mm.
QU4027radial quadrant R=400, incl. bore, max. bore = 150 mm.
QU4527radial quadrant R=450, incl. bore, max. bore = 150 mm.
QUSTOPsurcharge for additional rudder stop blocks
QUAUTOsurcharge for additional autopilot arm connected to quadrant

Quadrant specification form

Autopilot connection:

The best way to add an autopilot connection to the quadrant is an additional autopilot arm welded to the boss. Please note the above picture shows the 80° quadrant and not the 270° version.

Special shaft connections:

Quadrants for carbon rudder stocks need a profile in stead of a round hole. We can adjust each quadrant to suit your needs.
Quadrants for carbon rudder stocks need a profile in stead of a round hole. We can adjust each quadrant to suit your needs

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