1) The wedge
holding block, being firmly attached to the strut, provides the
means for holding the corresponding wedge that makes up the forward
part of the stationary cutter.
2) When a
line is caught between the stationary cutting blade and the rotating
cutting blade (attached to shall), the wedge forces the
two blades tightly together, overcoming the resistance of the
bearing and instantly cuts the line. Normally the stationary and
rotating blades never touch; they are held apart by the teflon
bearing which purposely isolates the metals from wear.
3) At the
instant of cut, the blades come closer together.
OF HOLDING BLOCK INSTALLATIONS
THE WEDGE HOLDING BLOCK
The wedge holding block is mounted onto
the the stem bearing tube or strut and held by stainless steel
screws (provided with cutter). Holes are to be drilled
and tapped to receive these screws. Holding block is to be used
as a template in place when all but first screw is drilled and
The wedge holding block is to be mounted on the same side
of the strut as the rotation of the propeller.
If there is a right-hand prop, the holding block would
be mounted on the starboard side of the strut; on a left-hand
prop, it would be mounted on the portside of the strut.
Holding block must be positioned to accommodate the stationary
cutter wedge, with the stationary cutter wedge entering only one-half
way into the V of the holding block. This is important to
assure enough clearance to move with shaft and avoid bottoming
in holding block V. If the male wedge of the stationary cutter
touches the bottom of the female wedge holding block during forward
end play, this will force the cutter blades together grinding
metal on metal, causing the blades to be destroyed through excess