Pen Mandrel/Bushing

Spent some time in the shop after dinner to finish up the making of the mandrel/bushing for Rollester. Wanted to make it for the Executive pens instead as I didn't purchase the bushing for them. But ended up making them for the Rollesters for 2 reasons, though I bought the bushing for them:
1) while waiting for the Executive pen kits to arrive, I can test them with the Rollesters;
2) the Rollester is slightly thicker than the Executive, I can still turn the bushings down to match what's required later.

Here are the pics:

Bought some unknown steel from the scrap bin of the metal shop at King George's Road. Those in the pic cost SGD10.

I had problem turning it initially, till I switched to the roughing tool.

The part to support the brass tube done.

Test fitting. Almost unnoticeable play.

Flipping the part in the chuck to turn down to the required size of the pen barrel. This will also be the part that goes into the chuck during turning.

Marking the out the required length with some gap in between.

This reminded me again that I need to get tools with chip breaker (or at least learn how to grind it). Dangerously sharp and stringy, especially when turning on autofeed.

Job done!

This is how the setup will look like when I start on making the balance 2 Rollesters.

That's all I've for tonight. I hope to start on making the Rollester tomorrow night, if time permits. There are also some job requests I've to start working on, which I'm hesitating as I have not tried cutting internal NPT thread before. In fact, I've not tried even the external thread for this thread type. From my research so far, the tool seems to be of the same angle as an UNC. The fact that no taper is needed for the parts, it could jolly well be a UNC except maybe the pitch. Got to read up more about it. Please share if you know something about cutting NPT. Appreciate that.