Dave Hoback
10-21-2021, 06:22 PM
Since I now KNOW those 22lb flat springs will work, I’m going to try a 20lb. But while thinking about it I started wondering what else I could do. How about a better firing pin? Little heavier, to deliver more force. Got into my knowledge of steels & decided S7 tool steel would be perfect. It’s a highly shock resistant air hardening steel & is very resistant to heat.
Quickly had a piece of 1/4” S7 here & cut to slightly longer than my stock FP.
https://i.ibb.co/T0VMQSL/54-F9-AFA9-CC5-E-47-D0-BC1-B-74-EF0-D3-F6733.jpg (https://ibb.co/HPWTcsd)
https://i.ibb.co/fNRpn3x/AFC583-CA-B8-FA-4-DDE-81-B2-36-CFAA6-F678-E.jpg (https://ibb.co/LgwtJTZ)
So the stock firing pin, the turned down porting through the cross pin is quite a a bit thinner diameter. Yet I found the Bolt head will accept up to a #25 drill bit(.149”). Turned the S7 down just a bit less for clearance.
https://i.ibb.co/zn6xGd5/042647-B2-EC16-4-C67-99-B5-71-B470-F61-EE9.jpg (https://ibb.co/C1P8hLt)And I thought why not make a new cross pin from the Titanium I have? So I did. Center Drilled to fit the new threaded S7 pin nicely & next to stock pin. I’ll finish the striker portion & flats at the very end. After I heat treat the pin. The pin is carrying a bit more weight & coupled with the increased FALL I added, even with the 20lb spring, it should work nicely. More to come!
https://i.ibb.co/YR4gn2W/DF33-F6-FB-2968-426-C-9-F49-1-DFDB819693-D.jpg (https://ibb.co/vwC9y1B)
And complete firing pin assembly. I darkened it by dipping in Ferric Chloride.
https://i.ibb.co/HCTVYks/6-E9239-BE-8-CA5-4709-9-BCF-7639-D2-AE2791.jpg (https://ibb.co/3vm7WLq)
Quickly had a piece of 1/4” S7 here & cut to slightly longer than my stock FP.
https://i.ibb.co/T0VMQSL/54-F9-AFA9-CC5-E-47-D0-BC1-B-74-EF0-D3-F6733.jpg (https://ibb.co/HPWTcsd)
https://i.ibb.co/fNRpn3x/AFC583-CA-B8-FA-4-DDE-81-B2-36-CFAA6-F678-E.jpg (https://ibb.co/LgwtJTZ)
So the stock firing pin, the turned down porting through the cross pin is quite a a bit thinner diameter. Yet I found the Bolt head will accept up to a #25 drill bit(.149”). Turned the S7 down just a bit less for clearance.
https://i.ibb.co/zn6xGd5/042647-B2-EC16-4-C67-99-B5-71-B470-F61-EE9.jpg (https://ibb.co/C1P8hLt)And I thought why not make a new cross pin from the Titanium I have? So I did. Center Drilled to fit the new threaded S7 pin nicely & next to stock pin. I’ll finish the striker portion & flats at the very end. After I heat treat the pin. The pin is carrying a bit more weight & coupled with the increased FALL I added, even with the 20lb spring, it should work nicely. More to come!
https://i.ibb.co/YR4gn2W/DF33-F6-FB-2968-426-C-9-F49-1-DFDB819693-D.jpg (https://ibb.co/vwC9y1B)
And complete firing pin assembly. I darkened it by dipping in Ferric Chloride.
https://i.ibb.co/HCTVYks/6-E9239-BE-8-CA5-4709-9-BCF-7639-D2-AE2791.jpg (https://ibb.co/3vm7WLq)