Denbigh Milling Machine
Several months ago I acquired a 60 year old Milling machine. It has a
4 morse taper drive to a right angled gear drive to the universal head, which has a 2 morse taper and for which I have bought on Ebay an arbour for holding 1 inch slitting saws and milling tools.I have been searching for a 4 MT arbour for the main drive as it is obviously more satisfactory. I can use the whole of the table and the power drive for it, for one thing as when using the universal head I can only mill across the table and there is only a width of about 8 inches and no power drive.
What I have found are two 4 MT tools one has a flange at the end and has been made into a flycutter. I could use this to attach an arbour to give me the capability to mount saws etc in the longitudinal direction. The Denbigh machine also has an over arm which can - if I turn down the end to 1/2'" provide a very strong support at the end.
Assuming I cannot find the exact arbour to fit the 4 MT and drawbar existing, what is the best means of driving an arbour?
At an old machinery shop I have found some arbours having another sort of taper and presumably a different drawbar thread. The trouble is that both the arbour and another 4MT with an internal thread to which I might attach a flange of some kind to drive an arbour are both hardened and so I don't think I shall be able to machine them in any way. Unless I can de-temper them(?)
Is there any fairly simple way round this? Does anyone have a suitable arbour ? The drawbar thread is 5/8 Whitworth.
I do have some pictures of this on my website - in the Old Engines bit in Personal Stuff. At maribelecosytems.com As you can no doubt tell I am not a mechanical engineer by trade but I can see lots of ways I can use this if I can support the right tools. I have sorted out all the other things on the machine.
Thanks for any advice.
Regards George.