Kelbly rings/lapping

goodgrouper · #1 01-12-2005, 12:14 AM

I don't know if this is posted in the right spot but here she goes:
I just bought some Kelbly 30mm rings and have read that they are CNC machined so well that you don't have to lap them. Is this true? Mine look good, but not that good.

jb1000br · #2 01-12-2005, 10:18 AM

[ QUOTE ]
I don't know if this is posted in the right spot but here she goes:
I just bought some Kelbly 30mm rings and have read that they are CNC machined so well that you don't have to lap them. Is this true? Mine look good, but not that good.

[/ QUOTE ]

LAP EVERYTHING!! It doesnt matter how straight the rings are if the action isn't perfect.

JB

sakofan · #3 01-14-2005, 02:54 PM

I'm no the other side of the ring lapping issue. Dont lap nothing!! [img]/ubbthreads/images/graemlins/grin.gif[/img]

A few ring marks on my scopes wont make me go out and buy a lapping bar. But, hey that's me!!...sakofan....YMMV, of course. [img]/ubbthreads/images/graemlins/wink.gif[/img]

chris matthews · #4 01-14-2005, 05:10 PM

Most lapping bars are made out of cold rolled steel and are plus or minus the width of your hand on tolerances (meaning they are not 1" or 30mm exactly) and will wear from the lapping compound. Plus scope tubes have a plus and minus tolerance also. So you decide......but Kelby is pretty decent stuff so you shouldn't have to.

goodgrouper · #5 01-14-2005, 11:42 PM

Thanks guys for your input! [img]/ubbthreads/images/graemlins/grin.gif[/img]

#6 01-15-2005, 02:34 AM

I disagree.
If your slapping Kelby rings on a rem 700 action you should (and highly recommended) lapp the rings as the outside diameter of the rem action is turned using a belt sander spun between rods or on a rod by hand.
I recently decided to cylindrically grind the outside dia of my rem 700 to make it concentric to the bolt bore.
It took .011 thou of grinding to produce a cleaned up outside diameter. It was tapered .0055 [img]/ubbthreads/images/graemlins/shocked.gif[/img]. Now that may not seem much but to a machinist like myself thats a load of room and will produce non centered rings imparting stresses into your scope. I guess it really depends on what scope your using too, if your sticking a 100 dollar trascho on it then dont waste your time but for me and my Leupolds and Nightforce scopes Im not spending 1k and then bending it to fit the rings.
JM2C

goodgrouper · #7 01-15-2005, 09:54 AM

Thanks Daveosok. I kinda figured they still needed to be lapped, but what do you think about it if they are going on a Speedy Gonzales sleeve that is supposedly straight in line?