# Romarin stern tube 235 mm with M4 shaft × 300 mm (ro1444)

> What are the dimensions of the Romarin 235 mm stern tube with M4 shaft?

- Category: RC boats › Props and drive hardware
- Kind: Modern device
- Basis: Secondary source: Lindinger (Krick distributor) (copy of the maker's figures; the maker publishes none directly)
- Page: https://xemstudio.com/objects/romarin-stern-tube-235mm-m4-ro1444/ · JSON: https://xemstudio.com/api/geometry?object=romarin-stern-tube-235mm-m4-ro1444 · Plain text: https://xemstudio.com/objects/romarin-stern-tube-235mm-m4-ro1444/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 6 | 6 | 300 |

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- A ready-made Romarin (Krick) stern tube for scale models: 235 mm tube, 6 mm diameter, carrying a 4 mm shaft 300 mm long with an M4 prop thread.
- Figures are from Lindinger (Krick distributor); whether 6 mm is the outside diameter is not stated, and the coupling-end thread is not published.
- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.
- Secondary source: the numbers come from a retailer or magazine copy of the maker's specification.

## Sizes

| dimension | value |
|---|---|
| Stern tube length | 235 mm |
| Stern tube diameter | 6 mm |
| Shaft diameter | 4 mm |
| Shaft length | 300 mm |
| Propeller thread | M4 |
| Bearing | plain bearing |
| Manufacturer no. | ro1444 |

## Where the files are

- Lindinger (Krick distributor): [ROMARIN Sterntube 235 shaft M4x300mm](https://lindinger.at/en/CARS-BOATS/ACCESSORIES/Boat-Accessories/Drive-Shafts/ROMARIN-Sterntube-235-shaft-M4x300mm/9779949) — web — Publisher's page; dimensions are facts

## Free STEP/STL (2 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/romarin-stern-tube-235mm-m4-ro1444/index.json

- romarin-stern-tube-235mm-m4-ro1444-tube-envelope: [STEP](https://xemstudio.com/files/hardware/romarin-stern-tube-235mm-m4-ro1444/romarin-stern-tube-235mm-m4-ro1444-tube-envelope.step) · [STL](https://xemstudio.com/files/hardware/romarin-stern-tube-235mm-m4-ro1444/romarin-stern-tube-235mm-m4-ro1444-tube-envelope.stl) — Stern tube Ø6 × 235 mm outside envelope (bore not published)
- romarin-stern-tube-235mm-m4-ro1444-shaft: [STEP](https://xemstudio.com/files/hardware/romarin-stern-tube-235mm-m4-ro1444/romarin-stern-tube-235mm-m4-ro1444-shaft.step) · [STL](https://xemstudio.com/files/hardware/romarin-stern-tube-235mm-m4-ro1444/romarin-stern-tube-235mm-m4-ro1444-shaft.stl) — Shaft Ø4 × 300 mm (prop thread not modelled; overhang split not published)

## Questions

**What propeller fits this shaft?**

Any prop with an M4 internal thread (4 mm shaft).

## Fits with

- [Romarin stern tube 90 mm with M4 shaft × 130 mm (ro1441)](https://xemstudio.com/objects/romarin-stern-tube-90mm-m4-ro1441/)
- [Romarin stern tube 175 mm with M4 shaft × 223 mm (ro1442)](https://xemstudio.com/objects/romarin-stern-tube-175mm-m4-ro1442/)
- [Raboesch M5 stern tube with ball bearing, shaft 290 mm (rb301-08)](https://xemstudio.com/objects/raboesch-shaft-m5-ball-bearing-290mm-rb301-08/)
- [Raboesch series 154 brass propeller, 2-blade 30 mm, left, M4 (rb154-02a)](https://xemstudio.com/objects/raboesch-154-2-blade-30mm-m4-prop-rb154-02a/)