Here is a quick down
and dirty about what it takes to make a dual bit 5" rope. This is
a picture of the finished product for you to be inspired by.
First we need to know a bit about the bits. You
will see here by the illustration that there are 2 bits that complete
the full 5" rope.
That means there will need to be a 5" pitch
to make a one start rope. Looking at the blades picture taking
the center one away. Really all you have left is a 2 start rope
at 2.5" spacing. After those first 2 cuts you will make the
center blade cut 1/2 a blade width back, to center it on a
hump. Got it? Now you will notice I modified the this rope
into a classical twist. I added another start. That would
mean you would need a 7.5" pitch. 5" for the rope and 2.5" for
the ledge and corebox cut.
Lets get started, round off your stock. Then set
the pitch to the 7.5 gears.
Load in 7525 bit and run 2 passes 2.5" apart
Now change over to the 7524 bit and center the point on
the edge of the unmilled area. Plunge about 1/2 way, 2 passes
will show you love your equipment.
Move it 2.5" to the right and make another pass
Now set to full depth and run the same two paths.
Now you can see the full radius and the pointed area
that will be our ledge and corebox cut.
We will use the 7525 bit for this ledge cut. After
all it's handy and the bit almost runs flat at the ends. Just
center it on the point .
Now use the same path with the core box and you will be
finished with the router.
And now the fun part, sanding.
This is what the bits look like after a job
Hope you learned something ask questions, I'll answer
them as soon as I can.