Thread: Layman receiver sight aperautre insert

Been learning how to use a lathe, enjoying it a lot. Have made some custom cleaning jags with brass, a paper cartridge former out of nylon, and other bits and pieces.
So today I wanted to solve a problem with my Winchester 88 sights. I started with Skinner sight (https://www.nzhuntingandshooting.co....oration-97465/) but found that was too far forward for my liking so managed to track down an original Lyman Receiver sight for the Winchester 88.

Started with problem #1, Aperture is too small for my liking. All good for target shooting but no good for hunting. Also found the insert too small in outside diameter I prefer a larger insert.


So I made another insert with a 3mm aperture and larger outside diameter. (Aperture size chosen as 1/8" being the suggested aperture size for general hunting). Realised a problem though, it cants up and bottoming out on the sight body.
Had to be very careful threading the insert as the 12-40 UNS thread doesn't take much to twist and bugger up. A very fine thread pitch.


Problem #2. This is the insert that come with the sight. While I made the new insert to the spec of this insert. I'm not sure the aperture that came with the sight is for this sight, it stops on the sight body and cants the whole aperture up. It needs a shoulder to register against the threaded portion of the sight.


Solution:



A quick oil blue:




Happy as, was a fun lathe project to learn a few techniques on. Including grinding a boring bit with good clearance for the face of the aperture. Even dived into the dark art of knurling, I'm not sure why the two attempts of knurling come out entirely different...