Custom Spearfishing Reel Knob

I need help re-engineering the plastic drag knob on my spearfishing reel. The current part works, but its overall dimensions no longer suit the way I handle the reel in the water, so the main goal is to adjust its size and profile for a smoother, more positive drag adjustment. Here is what I have and what I’m after: • Existing knob: injection-moulded plastic, threaded into a stainless spindle. • Issue: the present shape and footprint make fine tuning awkward; dimension changes are required so it’s easier to grip and turn with gloved hands. • Expectation: you take measurements from the original, propose the dimensional changes, model the revised knob in CAD (SolidWorks, Fusion 360, or similar), and supply manufacturing-ready files (STEP/STL). If you can also advise on, or even supply, a stronger material option—machined aluminium, carbon-filled nylon print, etc.—that’s a bonus, but design accuracy is the priority. Acceptance criteria 1. Updated 3-D model reflects the new size I approve. 2. Thread interface matches the original spindle with no play or cross-threading. 3. Knob edges are chamfered/rounded so they don’t snag line or gloves. 4. Final files are delivered in STEP and STL with a brief drawing noting critical dimensions. Once the model is finalised, we can discuss prototype or small-batch production, but the immediate deliverable is the complete, correct digital design.

Project ID: 40710163