3D Printed Rod Holders: Bank Heads & Bankstick Adapters

A 3D printed rod holder is not a novelty — it's a normal bank-fishing rod rest, made the way any rest is made, with the print step standing in for a mould or a lathe cut. Every Fishing3D bank head and bankstick adapter screws onto the same 3/8" BSF thread already standard on bank sticks, storm poles and rod-pod tops worldwide, so a printed head sits exactly where a bought one would. This guide covers how that thread fits, which head shape suits which situation, and what a printed rest is — and is not.

Why a printed bank head

Printing a rod holder is simple: you print exactly the shape you need, in the material you choose, and a replacement costs a few grams of filament instead of a tackle-shop trip. Three head shapes cover most bank-fishing situations — V Rest, Deep U Cradle and Butt Grip — each in a Standard and a Big-water size. Every head shares the same female 3/8" BSF thread underneath, which makes the range interchangeable across bank sticks, extensions and twin heads.

The 3/8" BSF thread, printed not cut

3/8" BSF is the thread every bank stick, storm pole and pod top uses, so it's the one thread these parts have to get right. Instead of a cut metal thread, the internal thread on every head and adapter is printed as part of the model — modelled at a deliberately close tolerance so it beds onto a steel stud without play, printed thread-opening-down so it comes out as clean concentric rings, flat face on the bed for solid adhesion.

A printed thread needs breaking in — expected, not a defect. Hand-thread the part onto a steel bank stick; the first turn feels firm, that's the thread seating. Back it off and run it on again two or three times and the steel stud burnishes the plastic smooth and snug. Too tight: clear stringing with a hobby knife, or re-slice at 100.5% scale. Too loose: wrap the stud in PTFE tape. Start square and let the stud do the cutting — a forced cross-thread ruins a print on the first try.

Three head shapes — and when to reach for each

All three share the same 3/8" BSF base; the difference is what happens to the rod above it.

• V Rest ($4, Big $5) — an open-front rest the rod drops into. Quickest to use, a good default when you're sitting right there watching the rod.
• Deep U Cradle ($5, Big $6) — a deeper, rounded trough that holds the rod against side wind instead of just resting it. Better on an exposed bank or a gusty day.
• Butt Grip ($6, Big $7) — a rear C-clip the handle snaps into and stays put, printed in PETG for the spring the clip needs. Good on a rod-pod back rest, or wherever you want the butt end held, not just supported.

Standard (S) sizes cover most rods and calm banks; Big (B) sizes are wider and deeper for heavier rods and rougher water — the Big V Rest, for instance, opens wider than the Standard's tighter V.

Bankstick adapters: extending, splitting and mounting

A bank stick has a male stud on top; every head has a female thread underneath. Adapters follow the same logic in reverse — female 3/8" BSF on the bottom, male on top — so you can stack: stick → extension → twin head → heads.

• Extensions — 100 mm ($5) and 150 mm ($6) — raise a head above the stick. Each one added is extra leverage on the stick and every thread below it, so push the stick in deeper rather than building the tower higher.
• Twin Head ($7) — one stud becomes two, 70 mm apart, so one stick carries a pair of rods. That spacing suits Standard heads side by side; the Big U Cradle can foul its neighbour at 70 mm, so pair it with Standard heads or angle the two heads clear.
• Camera Adapter ($5) — female 3/8" BSF on the bottom, a hex pocket on top for a real stainless 1/4"-20 hex-head bolt, 20–25 mm (not included). We deliberately don't print the camera thread itself: a printed 1/4"-20 thread in a small boss is exactly what shears when a camera swings on it, so the printed part's only job is to stop a real steel bolt turning. Always run a safety leash through the Ø5 mm hole to the bank stick or a peg — what stands between a knock and your camera in the water.

Material and printing

PETG is recommended across the range — tougher and far more UV- and weather-stable outdoors than PLA, which prints and works but gets brittle in sun and cold (more in the PETG vs PLA guide). Print at 4 perimeters, 30% infill, 0.15–0.2 mm layers for a clean thread. Every part prints thread-opening-down, and almost none need supports: the U Cradle, Camera Adapter, extensions and Twin Head print support-free. Only the Big V Rest's shallower arms want a touch of optional support, and the tall extensions want a brim for bed grip. Nothing here needs an unusual bed size — see our printer guide.

Honest limits

None of this makes a printed rod holder a load-rated product. We give no holding-force figure for any head or adapter, on purpose: a printed part's real-world strength depends on your printer, settings, material and wear, so any number we quoted would be more guess than fact. Every head and adapter here is designed for the standard 3/8" BSF bank stick geometry, built, in our construction, around a printed thread rather than a cut one — a statement about how it's made, not a promise about what it will hold.

Treat every head and adapter as a rest for a rod you're attending, not a clamp trusted unattended, and never as a way to secure anything against theft, current or a running fish. The Camera Adapter is the sharpest case: it carries no load rating, and its steel bolt and leash exist precisely because the printed part alone shouldn't hold a camera over water. Before any of these parts go on sale, we run real fit and load testing on physical prints against actual bank sticks — that shapes the design, but never becomes a load figure on a product page, because your print is not our test print. Inspect parts before every trip, rinse off salt and grit afterwards, and reprint anything cracked or stripped rather than gluing a repair and trusting a rod, or a camera, to it again.