Carbon Fiber Tube

Here is a complete, ready-to-paste prompt for Text-to-CAD. It includes all original dimensions plus the two required modifications, and is written to minimize ambiguity. --- **Create a 3D CAD model of a carbon fiber tube and export it as a STEP file.** **Tube geometry:** - Outer diameter: 185 mm - Inner diameter: 180 mm - Wall thickness: 2.5 mm - Total length: 800 mm - Modeling method: revolve or extrude a hollow cylinder. **Coordinate system and datum:** - Origin: center of the primary mirror end face. - Z-axis: along the tube axis, positive direction toward the front end (away from the primary mirror end). - 0° datum: the centerline direction of the focuser. - Angle direction: positive counterclockwise when looking from the primary mirror end toward the front end. - All holes are radial through-holes: the hole axis is perpendicular to and intersects the tube axis, and the hole completely penetrates the wall. **Hole list (height measured from the primary mirror end face):** 1. **Height 5 mm:** 4 holes of diameter **4.25 mm** at angles 0°, 90°, 180°, 270°. 2. **Height 681 mm:** 2 holes of diameter 4.5 mm at angles −23.4°, +23.4°. 3. **Height 724 mm:** 1 radial circular hole of diameter 93.5 mm at angle 0°. This is a large radial through-hole, not a rectangular window or slot. 4. **Height 724 mm:** 2 holes of diameter 4.5 mm at angles **48.0° and 60.6°** (these are moved approximately 15 mm along the circumference away from the 0° reference; their center-to-center distance remains about 20.2 mm). 5. **Height 767 mm:** 2 holes of diameter 4.5 mm at angles −23.4°, +23.4°. 6. **Height 785 mm:** 4 holes of diameter 5.5 mm at angles 0°, 90°, 180°, 270°. **Important notes:** - All holes are radial through-holes. - The two holes at height 724 mm (item 4) have been moved further from 0° by about 15 mm along the circumference. Their new angles are approximately 48.0° and 60.6°. - The four holes at height 5 mm (item 1) now have a diameter of 4.25 mm. - Keep all other dimensions, positions, and features exactly as specified. Please generate the full model and export the STEP file as quickly as possible.

Parameters

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.