Your quite right to call it knurling as it is not splines, the inner bore of the stator is smooth, I guess the axle is knurled so that the machined dimensions are less critical? the peaks of the knurling just squash as the axle is pressed in, which is quite easy when you have felt how soft the std axle material is!!
I don't have all the drawings, I cant tell you the difference between one axle or another, but if you sent me one to copy its no problem, it wont be knurled, it will be machined to be a press in fit with the keyway on the correct side so it can be used!
This is only the 3rd one I have made, the first for an HS3540 in aluminium
for my project 2 below, then one in Titanium :lol: for the HT3525 I am building now and this one in EN24T which BigSi tells me is a new type X5, I suspect this will be the same as the new 40xx series as it had a 38mm stator of the same dia. The older X series where a few mm larger on the stator dia.
I will save drawings of each one I do.
So any body saying can you make me an axle for
motor the answer is yes if you send me the old one even if its broken and tell me how you want it and what material, then we can arrive at a cost.
Then one day I may have all the details and be able to supply to order, so if your really stuck and don't have a local solution to your broken axle then we can get you rolling again.