I am making some New day timer brushes out of T starter brushes and need to know the length. The only New Day brushes I have now are worn to practically nothing.
Dave,I have two old NOS ones and the new brushes in them measure 1/2 inch. I don't know if you will have enough strength in a carbon brush for the keeper,but good luck.
thanks, that is what I was looking for. I will grind some more off.
Also by keeper do you mean the little piece of wire that holds the brush in the case. I was not going to install one.
I just did one a couple of days ago. I don't know if I got it shaped sufficiently close to the original to work well, but it seems to fit OK. A 1/16" bit made the hole for the keeper.
That's it. The spring in those is pretty strong.