Using wood dowel, the same diameter as the half shaft, wind on strip of 1/16″ thick, 7/16″ wide, cork material, in the manner shown. It will be necessary to secure the starting end with a pin or similar means. The gap between each turn should be 1/16″.
After completing about 3″ of winding, secure the loose end with a pin or other means.
The second layer of 1/16″ thick, 1/2″ wide, cork strip should now be wound over the first layer in the opposite “thread” direction, using an adhesive such as Araldite. No gap is made on this second layer, each turn has to butt up to the adjacent turn.
After the adhesive has been allowed to set, the completed tube may be slid off the dowel and cut into 1″ long lengths.
It is important to know that the cork seals used on the Morris Minor and Morris Eight are “handed”. That is to say that the off-side half-shaft uses a seal with an internal spiral wound one way, while the near-side half-shaft requires a seal with the spiral wound in the opposite direction. The object of the internal spiral is to persuade any surplus oil to wind back towards the centre of the rear axle.
The above method of manufacture will have to be repeated, with the cork strip wound in the opposite direction, in order to produce a set of oil seals.
Bibliography and Photographic credits
The Journal of the Morris Register, Autumn 1984, Vol.10 No.11