The base and rings are assembled on a steel lapping bar the abrasive compound silicon carbide aluminum oxide or alumina and boron carbide being commonly used is coated on the bar.
Lapping aluminum scope rings.
Slowly move the scope lapping tool back and forward along with a gentle twisting action.
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So how is it done.
There s no sure way to know when you re done other than looking and need to clean the interior of the rings for inspection more than once is a possibility.
Screw the ring tops on but don t tighten the screws too snug.
That s most likely the finish on the scope rings and a bit of metal coming from the interior of the rings during the lapping process.
Specifically applied to scope rings the user would assemble the base and rings with a steel lapping bar.
Lapping increases the surface contact between the scope tube and ring and aligns the scope rings.
Brownells scope ring alignment lap is available in 1 inch and 30mm versions shown and includes lapping compound.
But had i put the scope in those rings without reaming and lapping i would have probably ruined the scope.
Slowly screw down the top scope rings to provide extra pressure on the scope lapping tool.
You can also improve the same area by having larger diameter scope bodies or thicker scope bodies.
After 15 minutes of gentle action remove the two top scope rings and check.
The purpose for lapping the rings is to reduce any side loading flex on the scope.
Uncoated steel especially stainless is a different matter.
Http bit ly mrft9n lapping the rings on a rifle is a quic.
Originally posted by mathman hate and phobic are terms used to put a negative spin on distaste or dislike expressed in a contrary opinion.
Work the lap in zigzags through the rings and in figure 8s or ovals as the surfaces smooth up and the lap moves more easily.
When lapping separate scope rings i set them as far apart on the mounting rail as possible in order to provide the maximum lapping rod movement covered later.
The rings are tightened to the point where the bar can move but with slight resistance and the bar is worked back and forth.
So how is it done.
