OK, I have spent some time looking for this set of posts, I could not remember the correct wording to search for. :roll:
If you look
here you will find a post with a few pictures of my Wadkin, complete with dado head.
I don't use the dado head very often but it is a very quick way of rebating or grooving lots of timber, for small runs I would use a router or hand plane. I have a number of each that can be pressed into service.
The special nut for the dado set would be nice to have and would allow the whole of the set to be used, I don't have one. I can still mount a set of cutters for a 1/2" groove, the important thing is that the whole of the nut is on the arbour. The special nut effectively combines the standard nut with the front saw flange, allowing cutters up to 13/16" to be used. If anyone finds one with the correct square form thread, then let me know.
Rich (Trusses),
I have looked though the Wadkin operating instructions and cannot find any reference to the size of dado set that can be used on the saw, they are usually a bit smaller than the normal blade, after all you are unlikely the be cutting more than 1/2" or 3/4" deep grooves and it help to keep the weight down, my set is 8".