Beyond the propeller
Quiet comes from the whole driveline.
Vibration, rumble and gearbox wear usually trace to the driveline, not the prop. Bruntons builds the two pieces that fix it.
Constant-velocity coupling
SigmaDrive
Absorbs up to 3° of angular misalignment between gearbox and shaft — the single most common source of drivetrain vibration — while transmitting full thrust. Selector on the page: shaft, power, gearbox → model, in a minute.
SigmaDrive & the selector →Automatic shaft brake
Autolock
Hydraulic gearboxes can't lock their own shafts — Autolock's calliper-and-disc brake does it automatically the moment the engine stops, and releases the moment it starts. 340–520 Nm holding torque.
Autolock details →Corrosion protection
IonGuard
The retractable, replaceable anode system: change the anode while afloat, retract it in seconds when racing, monitor your corrosion protection without slipping the yacht — and swap anode types when you move between salt and fresh water.
IonGuard details →