Monday, June 8, 2009

Bolt & Barrel for the 2240 Steel Breech

Having finished the breech for my 2240 (parts 1,2,3), I needed a barrel and bolt.

I sawed a 2260 barrel in half.

Chucked in the lathe and crowned.

I decided to see if Cratex would remove the burrs.

Not bad.

The existing transfer port in the 2260 barrel lines right up with the breech.

Cutting the o-ring groove in the bolt.

Chamfering.

Turned to remove scale.

Looks like a bolt.

Finding the centerline and end.

Spotting the bolt handle hole.

So when you remove a drill bit from the drawer labeled "#29", it pays to measure the drill bit before using it...because it turns out that this is a #21 drill.

Counterboring the hole.

Tapping #10-32 for the previously mentioned reason

Ready to thread the bolt handle.

The handle end chamfered.

Turning a decorative bullseye in the end.

Yes, it's a bit chunky and I'm not entirely sold on it. But it is comfortable.

The pistol so far.

3 comments:

mikael.sundstron said...

Beautiful!
I am somewhat disturbed at times by the bolt moving forward by it self making it hard to load the gun, and I've meen thinking a grove on the end of the bolt with a ball bearing and spring in the breech would stop this.

/Mike S

T.M. said...

Mr Carter
Thank you for taking time and trouble
to run this blog, it is very informative and well explained.
Keep up the good work.
Kind regards
Tomislav

derrick38 said...

Mikael,

Drill a small hole in the rear of the bolt and install a rare earth magnet.
http://anotherairgunblog.blogspot.com/2009/03/magnetic-derricks-crosman-bolt-hold.html
Works just dandy.

Derrick