12.7 mm Post Collar MBA-05S

JCOPTIX post-holder collars screw onto Ø12.7 mm posts to fix height. Several types are available: 12.7 mm MBA-05S collars preserve mounted-optic height while posts rotate; 12.7 mm locating collar assemblies preserve post/holder height and orientation. 12.7 mm post collars. Models: MBA-05S-P6, MBA-05S. Fix post height. Diameter: Ø12.7 mm. Spring thumbscrew. JCOPTIX collars attach to Ø12.7 mm posts with spring thumbscrews and rest on holder tops, allowing rotation without height change. M3 support screws provide 10 mm fine height adjustment by changing M3 screw support height with a 2 mm key. 12.7 mm locating collar assembly. Model: MBA-05MC. Diameter: Ø12.7 mm. Restricts post/holder height and orientation. Ball/V-groove repeatability better than 0.5°. The assembly has a collar on the holder top and a locating collar on the Ø12.7 mm post. Together they maintain height/orientation. First clip the holder collar onto the holder and tighten its M4 rubber-tipped screw. With the locating collar's V-groove downward, secure it to the 12.7 mm post using an M4 rubber-tipped screw and set height. Insert the preset 12.7 mm post and secure the 12.7 mm post with the holder's spring thumbscrew. After assembly, loosen the holder collar's base M4 rubber-tipped screw and rotate the collar for limited angular adjustment. During rotation, maintain some spring-thumbscrew load on the 12.7 mm post to ensure two-point contact between holder and 12.7 mm post. 12.7 mm locating collar. Model: MBA-05MCA. Fixes height. Diameter: Ø12.7 mm. Thickness: 6 mm. JCOPTIX locating collars secure to 12.7 mm posts with M4 rubber-tipped screws, preserving optic height during rotation, and can also pair with holder collars from locating assemblies.

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