Jefa Quadrants

The Jefa 80° 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 opening in the quadrant is meant to be used as rudder stop. 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.

Jefa radial quadrants

Part No.

Description

QU1580

80° quadrant R=150, maximum bore size = 75 mm.

QU2080

80° quadrant R=200, maximum bore size = 75 mm.

QU2580

80° quadrant R=250, maximum bore size = 100 mm.

QU3080

80° quadrant R=300, maximum bore size = 100 mm.

QU3580

80° quadrant R=350, maximum bore size = 100 mm.

QU4080

80° quadrant R=400, maximum bore size = 125 mm.

QU4580

80° quadrant R=450, maximum bore size = 125 mm.

QUBORE

bore and key quadrant to customers dimensions

QUSTOP

surcharge for additional rudder stop blocks

QUAUTO

surcharge for additional autopilot arm connected to quadrant