Twin Pipe-Clamp Cross Bar — Rail-Mount Bar for Modular Kits

Twin pipe-clamp cross bar by MarineLab3D — a flat bar with a 2-piece pipe clamp at each end (from the Pipe Wall Clamp ML3D_0047), so you can mount it across two parallel tubes, rails or guardrails with no drilling. Each clamp sits on a saddle seat with a 4.1 mm stand-off, bolted to grip the tube. Set the collar bore and the bar length (centre-to-centre of the two tubes) and receive your STL files.

🔧 Two 2-piece clamps, perpendicular to the bar, on the wide face — clamp to rails/tubes, no holes in the structure. 📏 Fully adjustable: collar inner Ø and bar length (centre-to-centre). 🧱 Saddle seat + 4.1 mm stand-off = solid, precise clamp-to-bar joint. 🔩 Hardware: M5 bolts to close each clamp around the tube.

🔄 **Move your modules where you need them.** Want to relocate a holder for a passage — e.g. take the cabin VHF module outside while under way, or move the Garmin/chartplotter to the helm? Clamp this bar onto a rail or guardrail and hook your module on, no tools on the structure, no drilling. Take it off when you're done.

📐 **Bar length = centre of one collar to centre of the other** (i.e. the spacing between the two tubes/rails you clamp to).

🧩 **Optional rail-mount bar for these MarineLab3D modular kits** — use it instead of the screw-on wall rail to hang the kits on tubes/guardrails: - Modular Jar Kit — Wall Rail + 1–3 Square Jars (ML3D_0041) - Modular Rail Device Holder Kit — 1–3 Holders (ML3D_0042) - Modular Cylinder Holder Kit — Can · Bottle · Pens · Cup (ML3D_0052)

🧵 Print: PETG or ASA, 0.2 mm layers, 3+ perimeters. Prints flat, no supports. You receive a ZIP: bar + 2 fixed half-clamps in one piece, plus the 2 free half-clamps.

Use "Customize" to set the collar Ø and the bar length.

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Disclaimer. MarineLab3D sells digital 3D files, not finished parts. The strength, fit and safety of the printed part depend on your printer, material, settings and assembly, which are outside our control. Verify all dimensions before printing, use the recommended material and inspect every print. Provided "as is" without warranty; to the maximum extent permitted by law MarineLab3D is not liable for any damage, loss or injury arising from their use. Not certified marine equipment. Full Disclaimer & Terms of Use.

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**Want a different size?** This model is fully parametric. Set your own dimensions, see it in 3D, and download the STL for free — no account gymnastics, no paywall:

👉 https://marinelab3d.com/products/twin-pipe-clamp-cross-bar-rail-mount-bar-for-modular-kits-parametric-3d-print?utm_source=myminifactory&utm_medium=model&utm_campaign=ml3d_0053

The three STLs attached here cover the common cases; everything else you can generate yourself.

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*ML3D_0053 — part of the MarineLab3D catalogue: boat fittings, hose barbs, deck hardware and workshop tools, all customisable in the browser. Free for personal use (CC BY-NC-ND): print it, use it, share the link — please don't re-upload the file or sell prints.*

### Print settings - Orientation: All pieces flat on the bed - Supports: None - Layer height: 0.2 mm - Infill: 30% - Material: PETG / ASA

> Printed and checked on a Bambu Lab P1S in PETG.