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Compass Marine How To | all galleries >> Welcome To MarineHowTo.com >> Re-Packing A Traditional Stuffing Box > My Home Made Flax Insertion Tool
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April-15-2005

My Home Made Flax Insertion Tool

Many folks have asked me how I insert the flax rings into the female nut easily. Well, like anything dealing with boating, it's not always easy but can be done with a little Yankee ingenuity.


I decided that in order to keep my ring joints staggered, and to get them properly seated, I needed a new tool. I wanted a tool that was to be perfectly parallel with the prop shaft when inserting and seating the flax.


I also wanted to to seat the flax without causing any twisting and there were no commercially available tools, so I made one. Using a screw driver will not give you the correct angle to seat the flax properly and could potentially mess up the joints or put twists in the flax rings.

Nikon D70s
1/60s f/4.0 at 50.0mm full exif

other sizes: small medium large auto
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Tom 28-Feb-2009 20:24
If you’re using PVC as the author has suggested, you need to use 1"1/4 because 1" ID is too small and they don't make 1" 1/8 unless you want to use a female coupling that is too stiff to snap on and off. Also I used 2 hose clamps and tightened them during the heating process around the pipe, perfect fit. Make sure the slot you cut is large enough, because you won't want to use a screw driver to pry it off, that may nick your shaft.
Patrick 25-Oct-2008 01:48
Fantastic article and description. I have a Catalina 27 1984 in very good condition. However, the stuffing box constantly drips. The boat is now dry-docked. Is it acceptable to just tighten the stuffing box by a (one flat turn) and when launched in the spring find out where I am at. I don't believe the stuffing box has ever been touched. Thanks, Patrick
Patrick 25-Oct-2008 01:48
Fantastic article and description. I have a Catalina 27 1984 in very good condition. However, the stuffing box constantly drips. The boat is now dry-docked. Is it acceptable to just tighten the stuffing box by a (one flat turn) and when launched in the spring find out where I am at. I don't believe the stuffing box has ever been touched. Thanks, Patrick