Wanted to add a hammer spring adjuster to my homemade end cap for the gas tube. A 1/4-28 socket head cap screw, a couple 1/4-28 nuts, spring and a piece of 0.500" drill rod will do the trick.
Threaded the two nuts onto the bolt and tightened them together. Chucked the bolt by the nut so as to not scar the soft jaws on the hardened steel threads.
Turned the head of the bolt down, eventually leaving a small shoulder for the spring to seat against.
Chucked the half-inch diameter drill rod into the Taig, faced both ends and mounted a knurling tool.
Set the knurls at 45 degree angles for a diamond pattern. Knurled both ends.
Spotted, then drilled with a #3 bit.
Cut off a piece just over 0.250" thick, then tapped that #3 center hole 1/4-28.
Installed the modified bolt into the end cap and then used a permanent loctite to secure the knurled adjuster knob. Note the rough cut end facing out.
After the loctite hardened, I faced the end of the adjuster knob. This also faced the center bolt at the same time.
Cut a decorative groove in the outer face.
Back to the remaining knurled rod. Cut a matching groove in the face of what will become the bolt handle. Just trying to make the parts look somewhat cohesive.
Flipped the part and cut the end down to 0.165" diameter,
then threaded to #8-32. Flipped the die to achieve fully formed threads and finished the cut to the shoulder.
Turned the center portion of the bolt handle to 0.184". This diameter seems to work well in all of my Crosman steel breeches. Blued with Birchwood Casey Permablue Paste.
Another view of the finished bolt handle.
And a couple views of the finished adjustable end cap.
With all the pieces parts finished, I found the rest of the parts in my stash and assembled the 2250 tube using a set of 2240 pistol grips. An inexpensive Walther red dot sight topped it off.
Oh, the Walther sight has a weaver base, so there's a Leapers .22 dovetail-to-weaver adapter in there, too. I like the lines and the blued steel look of the completed gun.
Must've drilled the grip frame for a trigger stop, too, at some point. The gun points well and shoots far better than it should. But I say that about all the Crosman 22XX guns. A trigger/sear polish and a replacement steel breach and they're impossible to beat for the money. I'll probably add a poly transfer post at some point as well as get some velocity numbers. I'd like shoot it for a while as is and start working on some other airgun projects.
0 comments:
Post a Comment