Gears and transmission
Aluminium Sim Racing Gear Shifter Knob — Logitech G29 Adapter
- Bounding box
- 37.1 × 37.1 × 59.9 mm
- Engine
- Precision B-rep
- Parameters
- 10
- Published
- November 12, 2026
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The prompt
# EXACT REFERENCE-BASED ALUMINIUM GEAR SHIFTER KNOB Create a detailed 3D CAD model of an aluminium sim racing gear shifter knob. CRITICAL DESIGN INSTRUCTION: The supplied reference image is the primary design specification. Reproduce the exact external shape, silhouette, proportions, curves, taper and overall appearance shown in the reference. DO NOT create a generic cylindrical gear knob. DO NOT substitute the design with a simple tube, straight cylinder, sphere or conventional automotive gear knob. ## EXTERNAL GEOMETRY Reproduce the reference image as closely as possible: - Preserve the exact overall silhouette. - Preserve the distinctive upper profile and rounded transitions. - Reproduce the shape and angle of the lower section. - Maintain the same proportions between the upper, middle and lower sections. - Keep the exterior smooth and uninterrupted. - No decorative rings, grooves, logos, lettering or colour changes. - Design it as one solid machined aluminium component. The model should look like the reference image even when viewed from the front, side and three-quarter perspective. ## INTERNAL MOUNTING The knob must screw onto a separately purchased Logitech G29 shifter adapter. - Machine a central hole into the bottom. - Include an internal female thread matching the adapter's male thread. - Keep thread diameter and pitch as adjustable parameters. - Create a recessed mounting cavity. - Extend the lower exterior skirt approximately 5 mm below the visible mounting connection. - Completely conceal the metal adapter when assembled. - Maintain sufficient aluminium wall thickness around the threaded hole. ## MANUFACTURING Material: 6082-T6 aluminium. Designed for manual lathe machining, including: - Facing. - External turning. - Taper turning. - Drilling. - Boring. - Internal tapping. - Chamfering. ## OUTPUT Generate: 1. Fully editable solid 3D CAD model. 2. STEP file. 3. STL file. 4. Engineering drawing with front, side, top and sectional views. Keep all critical dimensions parametric. The external appearance must take priority over generic design conventions. Reproduce the supplied reference rather than creating a new interpretation.
Parameters
| Name | Value | Range |
|---|---|---|
| Overall Height | 59.5 mm | 35 – 90 |
| Maximum Body Diameter | 36.4 mm | 24 – 60 |
| Waist Diameter | 26.8 mm | 16 – 50 |
| Lower Skirt Diameter | 32 mm | 20 – 55 |
| Skirt Extension Below Mounting Face | 5 mm | 1 – 12 |
| Recessed Cavity Diameter | 18 mm | 8 – 26 |
| Cavity Depth | 6 mm | 2 – 20 |
| Thread Major Diameter | 10 mm | 5 – 16 |
| Thread Pitch | 1.5 mm | 0.5 – 2.5 |
| Threaded Bore Depth | 28 mm | 10 – 45 |
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.
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