Pen mandrel centering issue

[Parson]

I'm having a dickens of a time getting my Jr. Gents closed ended mandrel from AS centered in the drill chuck. No matter what I try it's not in the dead middle.

I even ground off the points on the nut thinking this might be in the way deep inside the drill chuck.

Does anyone have any advice to offer?

 

[BigShed]

I have never used a drill chuck for these, I use an ER25 collet chuck for all my pen turning, never have any OOR issues.

 

[Paul in OKC]

Drill chucks are not the best things to hold a mandrel in for turning, unless it is a high dollar one.

 

[PenMan1]

+ 1 on NOT using a drill chuck. A MT1, MT2 (whatever your lathe takes) or even a "screw adapter" mandrel (usually $20 -$30) will qiuckly pay for itself by eliminating or greatly reducing your thow-aways cause by trying to produce "true" products with a drill chuck mounted mandrel.