{kolom col-md-6}
Easy does it
Physical power has given way to innovative hydraulics. Whereas many shipyards still heat the propeller and then force the propeller nut into place using a hammer and slogging spanner, De Waal has progressed beyond that. A hydraulic piston ring integrated into the propeller shaft nut now enables the propeller to be locked in place without any heating or hammering.
Operating principle
The propeller slides onto the prop shaft, and the propeller nut is tightened by hand. A hand pump is then used to inject oil into the cavity behind the piston ring, forcing the ring out of the nut and pushing the propeller onto the shaft until it fits tight onto the tapered end. The oil pressure is then released to retract the piston ring, and the nut can be effortlessly screwed home to lock the propeller in place.
{kolom col-md-6}
Secure and watertight
The Stuwa® propeller nut is secured by a unique method without any welding. A special pin holds the propeller nut effortlessly in place thanks to CNC-machined slots. The nut simply cannot work loose. Finally, the end cap is fitted to make your propeller shaft end absolutely watertight.
Features
- Over 40% more fitting power than manual hammering
- No need to heat propeller, no risk of deforming
- No risk of cone deformation by heating
- Watertight propeller shaft end, no risk of corrosion
- Simple and ergonomic system for easy fitting
- Conventional fitting method using slogging spanner can still be used
- Can also be used to hydraulically remove the propeller
- No need for hammering when removing propeller
- Nut is included in the price of every propeller shaft
- Precision in-house production using CNC equipment