Anchor Bow Roller — Grooved, Parametric (3D Print)

Parametric ANCHOR BOW ROLLER by MarineLab3D — a replacement grooved roller for your bow fitting (musone). Size it to your bow roller width and chain caliber, preview in 3D, and after purchase receive STL files generated to your specs.

⚓ Central groove sized to your chain caliber (+1.5 mm) with a rounded U-bottom, and a 60% outward flare in the upper half: cradles and guides the chain so it does not jump off.
📏 Roller length = your bow-roller gap; outer Ø ≥ chain + 20 mm for strength.
🛞 Through-bore for the pin/axle. Optional PRINTED BUSHING (separate part, included): inner Ø = your pin, wall 3 mm; the roller bore is sized to the bushing OD with print tolerance for a precise, play-free fit.

🧵 Print specs: 100% infill. Roller — PA612-CF strongly recommended (high wear & UV/marine resistance); ASA or PETG-CF as alternatives. Bushing — PTFE-filled filament (self-lubricating, low friction).

Use “Customize dimensions” to set bow-roller width, chain caliber, outer Ø, pin Ø and bushing option.

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🖨️ No 3D printer? After purchase you can request an instant print quote on your download page: your model is sent pre-loaded to our partner Craftcloud, which compares ~180 print services worldwide and ships the finished part to your door — no printer or setup needed.

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📄 License — Personal use only. Print this model for your own personal use. Reselling or sharing the file, or selling printed copies, is not allowed. © MarineLab3D — full terms.