Lapping Rings

Your are not lapping rings with a finger and emery paper...

Bases on tight.
Bottom halves of rings on tight and aligned as best possible.
Round lapping bar of the correct size (either 1 inch or 30 mm for the majority of rings)
120 grit abrasive dust with thick oil applied to rings and bar.
Rub the bar forth and back while twisting and keeping down pressure into the ring halves.
You will feel it get easier to do, stop and wipe the rings clean and inspect.
Repeat lapping if required.
Stop when the majority of the ring surfaces are lapped.
Clean and apply powdered rosin to ring surfaces.
Place the scope in the rings.
Apply powder rosin to the top ring halves, and attach.
 
I have a 1" lapping bar (don't use any 30mm tubes), and lapping compound.

Put the bar in, fit the rings, then gently snug them up as I go, until I've a fairly snug fit.

I just sorta wondered how far guys go with the actual lapping.

Like are you trying to get perfect contact?

I just did some Leupy rings and they are far from perfect (prior to lapping anyway).
 
guntech said:
Bases on tight.
Bottom halves of rings on tight and aligned as best possible.
Round lapping bar of the correct size (either 1 inch or 30 mm for the majority of rings)
120 grit abrasive dust with thick oil applied to rings and bar.
Rub the bar forth and back while twisting and keeping down pressure into the ring halves.
You will feel it get easier to do, stop and wipe the rings clean and inspect.
Repeat lapping if required.
Stop when the majority of the ring surfaces are lapped.
Clean and apply powdered rosin to ring surfaces.
Place the scope in the rings.
Apply powder rosin to the top ring halves, and attach.
Click to expand...


Guntech, sounds like I'm doing it kinda half-a**ed, compared to that.
 
guntech said:
Your are not lapping rings with a finger and emery paper...

Bases on tight.
Bottom halves of rings on tight and aligned as best possible.
Round lapping bar of the correct size (either 1 inch or 30 mm for the majority of rings)
120 grit abrasive dust with thick oil applied to rings and bar.
Rub the bar forth and back while twisting and keeping down pressure into the ring halves.
You will feel it get easier to do, stop and wipe the rings clean and inspect.
Repeat lapping if required.
Stop when the majority of the ring surfaces are lapped.
Clean and apply powdered rosin to ring surfaces.
Place the scope in the rings.
Apply powder rosin to the top ring halves, and attach.
Click to expand...

What's the reason for not lapping the tops?
 
guntech said:
Your are not lapping rings with a finger and emery paper...
Click to expand...

No, your not... I am...

Just removing the burrs and smoothing out the finish... no marks on the scopes when they are removed and no movement when they are locked down... easy and smooth adjusment when the screws are backed off.
 
hoytcanon said:
No, your not... I am...

Just removing the burrs and smoothing out the finish... no marks on the scopes when they are removed and no movement when they are locked down... easy and smooth adjusment when the screws are backed off.
Click to expand...

His point is, what you're doing isn't lapping, just deburring. While it might work if the rings are aligned, when they're off it will stress the scope tube even if you don't see any deep markings or damage to the finish.
 
You must log in or register to reply here.
Back
Top Bottom