Can anyone help me with what size the spindle is on a mill my friend just bought at auction.
The mill is a Parkson & seems fairly old.
It has a fixed head, the table has power feed in X,Y & Z axis so that`s good.
It has 415v power & all else seems to be in good order.
The following link is for an identical machine for sale on Ebay. That may help with identifying what I`m talking about.

http://cgi.ebay.com.au/PARKSON-MILL_W0QQitemZ1503063067...QQrdZ1QQcmdZViewItem

Our problem is we have no tooling for it.
The internal measurements of the spindle are as follows.
Top of spindle - 30mm
top of taper - 30mm
bottom of taper - 44mm
length to spindle bolt - 105mm

The above measurements are all +/- 1mm or maybe a bit more as I only had the most rudimentary measuring equipment available so please excuse me on that.
I have very little knowledge of the various sizes of mill spindle bores etc.
If I can identify the actual size then we can go & look for the correct arbor. (if that`s what you call it)
thanks in advance for any replies

many mills use an R-8 collet like this.....does this look about right?

If you have access to a library find a machining reference book. In the US an example is Machinery's Handbook. Most of those old mills used standardized tapers. That particular mill may have been designed to use end mill holders not collets. The old holders were a close fit on the end mill shank and used a set screw to retain the end mill.
If you don't find out by Tuesday email me at ireload2 at yahoo .com.

In the us the usual light duty mill collet is called R8.

Just a quess after looking at the E-bay add. The tooling on the bed looks like it has a nmtb-40 taper. The Gordon Master mill uses the same.