Meddings drill, useful info & more questions

[Woodmonkey]

The useful info for anyone wanting to convert one of these to single phase is that the motor for a myford ml7 has the same size mounting and shaft as the 3 pH motor which was on there, and these motors seem to be fairly easy to source, I picked one up in decent condition from eBay for £40. So it was a straightforward case of removing the pulley, putting it on the new motor and bolting it to the drill, simples! All working, now all I need is a chuck. Currently the drill looks like this

There's a hole in the bottom that measures just under 12mm, is this a Morse taper? Do I need to find a chuck with an arbor that will fit into the hole? Any ideas what size it would be?
Cheers

 

[CHJ]

Looks like it's standard Morse Taper fitting, at 12mm diameter quill bore I would suggest it is a No.1 Morse.
See this PDF for dimensions

 

[Woodmonkey]

Also, can anyone tell me the size of the thread for the handles, all three are missing from mine so will have to fabricate somehow...