precision block 3d model

// Precision Guide Block (Plastic Feature Layout + Aluminum Dimensions) $fn = 60; module guide_block() { difference() { // Base Block with L-lip extension union() { cube([38.1, 12.7, 25.4]); // Main body: 1.5" W x 0.5" D x 1.0" H cube([38.1, 19.05, 6.35]); // Bottom L-step: 1.5" W x 0.75" total D x 0.25" H } // Center Arch Channel translate([19.05, -1, 12.7]) rotate([-90, 0, 0]) cylinder(h=22, r=6.35); // 0.5" Diameter center arch cutout translate([12.7, -1, 0]) cube([12.7, 22, 12.7]); // Channel slot down to base // Left Counterbored Mounting Hole translate([7.94, 12.7, 16.0]) rotate([-90, 0, 0]) { cylinder(h=15, r=2.38, center=true); // Bolt clearance hole (~3/16") translate([0, 0, 2]) cylinder(h=10, r=4.5); // Counterbore recess for bolt head } // Right Counterbored Mounting Hole translate