.290 bushing

[Alpha1]

I'm looking for .290 and .292 neck sizing bushings any make will do for a project I'm working on.

[ovenpaa]

You can make them yourself with some care, I occasionally make reamer bushings although it is time consuming. The trick is to not remove the bushing from the machine until you are ready to part it off and I use a carbide micro boring bar system and allow the cut to wash out a few times to overcome any deflection in the bar with the earlier cuts.

[Alpha1]

What material did you use was it stainless. When you say you reamed them does that not mean you would have to have a reamer in .290 and .293. Carbide micro borers sounds interesting and rather specialised I guess and probably expensive. :)

[ovenpaa]

I make bushings to fit chamber reamers as opposed to reaming bushings, having said that I do ream some bushings however I do not always have a reamer to suit.

Yes, it is a bit confusing.

This is one of the micro boring bar systems I use, it is sitting in a Dickson S2 quick change tool holder and there are a few cutters to show the different sizes. I also use these for internal O ring grooves and some internal threading when I need very fine threads such as .5mm and less.

[ovenpaa]

If you can get a cutter holder made I can send you a couple of spare cutters for it

[Alpha1]

Interesting thanks for that. Facinating stuff. Wow that's a very generous offer thank you. I'd be happy to buy a couple of you.
I'm sure one of the guys at work could make me a holder.

[ovenpaa]

You are welcome to a couple of spares. Remind me of your address by PM please and I will ask the Viking to pop them in the post.

[ovenpaa]

As an aside the drawing behind it is my take on a Speed Loader for a Remington 66 I built yesterday

[Alpha1]

Yes that did catch my eye I actually blew the picture up so I could have a closer look. I wish I was a fly on the wall in your workshop.

[ovenpaa]

You are welcome to the full drawing, it is a sketch of a work in progress as much as anything and the recently finished item has changed dimensionally in a couple of places to streamline it.