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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Scope clamp screw torque on ARC M-brace rings with a Sightron SVIII 5-40x56.
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<blockquote data-quote="wldcat" data-source="post: 3018730" data-attributes="member: 124994"><p>It needs to be 55 inch pounds, Sightron either isn't familiar with arc rings or they are only willing to spout off generic info based off traditional ring design. The larger diameter screw that's used has a corse thread pitch which applies less clamping force per given torque value. I've never tried to run them at only 18 inch pounds but I do run them at 55 with no problems. Quote from arc about torque</p><p></p><p>"Yes, this is higher than typical. American Rifle's rings use a larger diameter scope clamp screw than that used by most other</p><p>manufacturers of rings. To clamp the scope tube with a force similar to rings having multiple small screws, a higher torque</p><p>must be applied to the single larger scope clamp screw on American Rifle's Rings.</p></blockquote><p></p>
[QUOTE="wldcat, post: 3018730, member: 124994"] It needs to be 55 inch pounds, Sightron either isn’t familiar with arc rings or they are only willing to spout off generic info based off traditional ring design. The larger diameter screw that’s used has a corse thread pitch which applies less clamping force per given torque value. I’ve never tried to run them at only 18 inch pounds but I do run them at 55 with no problems. Quote from arc about torque “Yes, this is higher than typical. American Rifle's rings use a larger diameter scope clamp screw than that used by most other manufacturers of rings. To clamp the scope tube with a force similar to rings having multiple small screws, a higher torque must be applied to the single larger scope clamp screw on American Rifle's Rings. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Scope clamp screw torque on ARC M-brace rings with a Sightron SVIII 5-40x56.
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