Recutting Savage closing cams

M

MMGunsmithing

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Does anyone know how to re-cut the closing cams on a savage? I know Fred Moreo does it but I can't squeeze it out of him how.

thanks

~MMG
 
Dusty Stevens said:
first off why do they need to be recut? I would think any machinist could do it as simple as they are.
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Savage cocking ramps are not helical so the lugs do not contact the full width of the ramps when closing the bolt. I can't say if it's an improvement or not to have true helical ramps.
 
I'm just trying to find a way to keep the bolt perfectly square to the barrel. Having everything ride on the center-line of the bore plays a huge part in accuracy. I figured recutting the cams so be uniform to one another would help take any uneven pressure off of either side of the bolt head.

~MMG
 
I think i have my answer. I can ask elsewhere. The post can be closed.

~MMG
 
The 1917 & P14 enfields are the only actions I know that have the locking lugs cut on a helix.
Regards,
Ron
 
A crude way to cut a helical cam would be to set your compound feed to 90. Find the pitch you want and keep the half nut engaged. Do one side at a time by manually rotating the chuck back and forth moving your cross feed each time on the cut stroke and then rotating the chuck backwards past your halfnut backlash and then repeating the cut stroke. When it is time for the other side, move your 90 degree compound 50% of the pitch. I'm not sure I would try it on a good action, but it might work.
 
JRM850 said:
A crude way to cut a helical cam would be to set your compound feed to 90. Find the pitch you want and keep the half nut engaged. Do one side at a time by manually rotating the chuck back and forth moving your cross feed each time on the cut stroke and then rotating the chuck backwards past your halfnut backlash and then repeating the cut stroke. When it is time for the other side, move your 90 degree compound 50% of the pitch. I'm not sure I would try it on a good action, but it might work.
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Not sure most lathes used for gunsmithing would have fast enough pitch rate I would need to calculate angle and length to figure pitch, you are kinda on the right track.
 
geo.ulrich said:
Not sure most lathes used for gunsmithing would have fast enough pitch rate I would need to calculate angle and length to figure pitch, you are kinda on the right track.
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Good point. I can only get a 5.98 degree helix angle on my lathe. Not even close.
 
JRM850 said:
Good point. I can only get a 5.98 degree helix angle on my lathe. Not even close.
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Now with that answer it makes me wonder what helix angle is used on some of the custom actions and what thread pitch would be required to duplicate the helix?.......Ian
 
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