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Old 01-03-2017, 10:02 PM
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J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement?  
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Default J Frame Mainspring Swivel Replacement?

Starting work on one of those grungy LEO trade-in 640-1s.
Upon disassembly, I discovered that the rubber(?) mainspring swivel is half disintegrated.
Of course, it's out of stock everywhere.
I could make a brass replacement on my lathe in a few minutes.
So question is: Is there any reason that this has to be rubber?
Brass seems more better to me.

thanks.

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Old 01-03-2017, 10:52 PM
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J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement?  
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I think they changed over to "plastic" because it's cheap, and it saves a bit on weight.

I've got an extra one of the plastic ones I can send if needed.

Looks like Numrich has some....(steel ones)

36-1 Accessories | Numrich Gun Parts
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Last edited by armorer951; 01-03-2017 at 11:20 PM.
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Old 01-04-2017, 01:11 AM
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J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement?  
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I know S&W calls it a Mainspring Swivel, but "Spring Seat" strikes me as more appropriate. No, they don't need to be plastic, the originals going back to the 1950s in Improved I-Frames and J-Frames were always steel. It was sometime in the 1990s they changed to the cheap **** plastic ones that don't last! This wasn't a good place to save a few cents per gun.

armorer951,

Thanks for the reminder and the link. I have been meaning to replace the plastic ones in a couple of guns and this reminded me. Just ordered 3 from Numrich.
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Last edited by Alk8944; 01-04-2017 at 01:20 AM.
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Old 01-04-2017, 01:21 AM
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J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement? J Frame Mainspring Swivel Replacement?  
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Thanks fellas.
I'll just make one in the morning.
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