All:
I finally received the custom mainspring and thought I'd post the steps needed to get it ready for installation. Many of you've probably done this before but for me, this is a new experience.
The first thing I needed to do was to fabricate the barrel end which was of the tang hook type. I found some shim stock of the correct thickness, and snipped out a rough copy. In order to punch and file this stuff, I had to anneal it. I did that, and put some dye on it so I could see the scribed outline of the old part.
- Pic1_ShimStockAnealed.JPG (51.66 KiB) Viewed 10361 times
Here's the copy next to the original before I filed it to length, added the knife edge, and punched the rivet hole.
- Pic2_NewTangBesideOldBeforeSharpening.JPG (41.22 KiB) Viewed 10361 times
I selected a punch close to the original hole diameter and punched the new hole on my staking set.
- Pic3_PunchingTangHole.JPG (60.16 KiB) Viewed 10361 times
Next, I cut the custom mainspring material to the correct length. The supplier punched the arbor end for me, so I didn't have to deal with that.
- Pic4_NewMainSpringCutToLength.JPG (64.93 KiB) Viewed 10361 times
continued...