Oh Ok, since you asked so nicely

To make the 5MT/5C adapter I decided to use the Taper turning Attachment for cutting the 5MT and the compound slide for the 5C
First job was to set the taper turning attachment to 5MT which is 1° 30' 26". Using the TTA angle gauge to set somewhere near is OK for starters, but to set up truly a 5MT tapered item is needed to run a dial gauge along.
As I don't have any 5MT tooling I was left with using the dividing head spindle itself. I wasn't to sure about this as it's rather big and long and stability could be an issue.

I needn't have worried,

The 8" four jaw is a sturdy beast and coped rather well. After centering the spindle for runout the dial gauge is run up and down the internal taper and the TTA is set to run true. Both settings were managed with no discernible movement on my tenths DTI.
Sounds easy dunnit ..

Nothing could be further from the triuth, it quite literally took me far, far, longer to set this up than the rest of the whole job.
Now to start attacking some material. In this case another lump of EN24 (a hard tool steel that loves chewing up your carbide) Again dial in as true as can be done with such a rough bar. The center was drilled out to one inch.

And then bored to depth for the 5C collet body. I seriously need to get me some bigger boring bars, this is a 16mm shank lathe tool. Not ideal but it worked.

The compound was set over to 10deg and the 5C taper was cut whilst testing with a sharpie along the way. Though I didn't need any adjustments.

Rotating center in the tailstock onto a 5C collet held in the workpiece to steady it. Skimmed off the surface rust and partially part at the final length to give a runout area whilst cutting the taper.

Taper attachment engaged and the 5MT taper was cut.

Edges chamfered, parted off and here we are, finished.

Some outdoor posing shots ... just cos it was sunny




Now I just need to make a matching drawbar to the 5C collet ...
