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Plinkercases
 Post subject: Machining challenge
PostPosted: Sun Feb 15, 2015 9:57 pm 
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Location: Toronto
To all you metal miesters I have a challenge:

Here are pictures of the Co2 tightening knob on one of my Crosman SA6's. The other knob has 3 grove/notches in it that look like they are for a flat head or some tool to help tighten/loosen but the notches are burred and worn so a flat head won't do it...just slips and caused more damage. Both knobs are impossible for me to work with my old digits and ate both burred over the years so even if I could they damage the old finger tips. SO.....

I wonder if someone can machine 2 new (herder material) knobs with solid notches and a tool properly sized so as not to strip out and burr. I will send the existing pieces (knob and threaded ram) and gun if necessary.

And of course cash or barter for good and services always an option.


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EverHopeful
 Post subject: Re: Machining challenge
PostPosted: Sun Feb 15, 2015 10:05 pm 
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Are they both the same (originally)? If so, if you bring one to GTAC tomorrow I could take a look and see if it's something I can do. Assuming it's a thread I have a die for it sounds fairly straight forward.

edit: ok, looking more closely, it seems it's the nut that needs replacing, so "thread I have a tap for" :)

Jim
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Plinkercases
 Post subject: Re: Machining challenge
PostPosted: Sun Feb 15, 2015 10:26 pm 
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Jim,
Yes it is the nust that need replacement. OK I will bring one to GTAC next Monday.
Thanks!

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EverHopeful
 Post subject: Re: Machining challenge
PostPosted: Sun Feb 15, 2015 10:34 pm 
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OK, sounds good. Out of interest, if a standard nut fits the thread, doesn't that do what you want?
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lleader
 Post subject: Re: Machining challenge
PostPosted: Sun Feb 15, 2015 11:35 pm 
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Seems to me that four small holes drilled around the circumference just big enough to fit a small allen key would do the job. Use the allen key as a tool to rotate the nut.

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Plinkercases
 Post subject: Re: Machining challenge
PostPosted: Sun Feb 15, 2015 11:36 pm 
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hmmmmm.... that I can even try myself and let Jim see what he can do.
Good idea.
Thanks.

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Ace
 Post subject: Re: Machining challenge
PostPosted: Mon Feb 16, 2015 12:08 am 
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lleader wrote:
Seems to me that four small holes drilled around the circumference just big enough to fit a small allen key would do the job. Use the allen key as a tool to rotate the nut.

lleader is correct did this to one that lost all its groves worked great, easy peasy lemon squeezy..... 8)
just don't over tighten the nut now that you have some leverage :wink:

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