[Shop-talk] Roll crimping an instrument bezel by hand?

[Jim Franklin]

Hahaha, yea, the MINUTE the housing market loosens up and I can find a place with a decent shop opportunity that's also not 100 miles from an airport (work)...

I saw a video of roll crimping shotgun shells on a drill press but that uses a special crimping tool, and the tool rotates in the drill instead of the shell, whereas in my case I'm 99% sure I'll need the speedo to rotate while the crimper is fixed, especially with the cable housing and threaded mounting studs standing proud of the back of the gauge. 

jim

> On Aug 10, 2024, at 7:19 AM, Moose <eric at megageek.com> wrote:
> 
> Jim, 
> 
> Doesn't seem like this would be to hard to fab something up to do this on a drill press.  The 'live center' would be the biggest challenge, but I can think of a bunch of ways to do it. 
> 
> Don't forget, this is also an excuse to buy a REALLY helpful tool!  8>) 
> 
> Moose 
> 
> 
> 
> From:        Jim Franklin <jamesf at groupwbench.org> 
> To:        Shop Talk <shop-talk at autox.team.net> 
> Date:        08/09/2024 14:37 
> Subject:        [Shop-talk] Roll crimping an instrument bezel by hand? 
> Sent by:        "Shop-talk" <shop-talk-bounces at autox.team.net> 
> 
> 
> 
> I need to round over the bezel of a motorcycle speedometer after replacing the glass. I've seen it done by lathe:
> 
> https://www.youtube.com/watch?v=G2ugiz4xVrU
> 
> but my lathe buddy has been saying "this weekend" for over a month. I don't have anything bigger than a hand drill at the moment. The bezel sticks up about 2mm past the face it needs to crimp over, so not much to work with, and that's with one hand compressing the rubber seal. 
> 
> I tried rolling a big socket over it to simulate the avove motion but I couldn't get the metal to deform at all. I feel if I use more leverage like with a tablespoon I'll end up stretching the metal rather than shrinking it to its smaller circumference. 
> 
> I'm sitting on my hands but if we don't get to it this weekend I'm afraid I'll lose it and end up ruining it. Any ideas on how not to ruin it? :-)
> 
> thanks,
> jim
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