Mechanical Components · Free generator

Twin-rod accessory carriage

A reinforced carriage with two parallel rod bores, four counterbored accessory fasteners and a central belt channel.

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Choose Continue editing in Nora3D inside the generator to keep your dimensions in an editable copy. Change features and export STEP CAD files.

Before you print

Carriage 100 x 68 x 30. Two rod axes along Y at X=-32,+32,Z=16. Four accessory mounts on 44 x 42 centers. Central belt channel passes through the base. This is a fit prototype, not a substitute for a rated linear bearing. Geometry has been digitally checked; this template has not been physically test-printed.

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AI CAD prompt

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Create a new owned Nora3D part document. Use millimeters, world XY as the base and +Z as height. Retain named native features and expose only the controls listed below.

1. Create **Core**, a 100 × 68 × 26 box, centered at X=0, Y=0, with its bottom at Z=0.
2. Create **Front rail**, a 100 × 8 × 4 box, centered at X=0, Y=-30, with its bottom at Z=26.
3. Create **Rear rail**, a 100 × 8 × 4 box, centered at X=0, Y=30, with its bottom at Z=26.
4. Unite **Core**, **Front rail**, **Rear rail** as **Carriage blank**. Require one connected result.
5. Create **Left rod**, radius 6.2, height 74, initially along +Z, with its base center at (-32, -37, 16).
6. Rotate the current **Left rod** solid -90 degrees around world X through [-32, -37, 16]. Resolve the actual current entity ID before the operation.
7. Create **Right rod**, radius 6.2, height 74, initially along +Z, with its base center at (32, -37, 16).
8. Rotate the current **Right rod** solid -90 degrees around world X through [32, -37, 16]. Resolve the actual current entity ID before the operation.
9. Create **Belt channel**, a 10 × 74 × 5 box, centered at X=0, Y=0, with its bottom at Z=3.
10. Create **Bolt -22 -21**, radius 2.6, height 34, initially along +Z, with its base center at (-22, -21, -1).
11. Create **Counterbore -22 -21**, radius 4.5, height 6, initially along +Z, with its base center at (-22, -21, 22).
12. Create **Bolt -22 21**, radius 2.6, height 34, initially along +Z, with its base center at (-22, 21, -1).
13. Create **Counterbore -22 21**, radius 4.5, height 6, initially along +Z, with its base center at (-22, 21, 22).
14. Create **Bolt 22 -21**, radius 2.6, height 34, initially along +Z, with its base center at (22, -21, -1).
15. Create **Counterbore 22 -21**, radius 4.5, height 6, initially along +Z, with its base center at (22, -21, 22).
16. Create **Bolt 22 21**, radius 2.6, height 34, initially along +Z, with its base center at (22, 21, -1).
17. Create **Counterbore 22 21**, radius 4.5, height 6, initially along +Z, with its base center at (22, 21, 22).
18. Subtract **Left rod**, **Right rod**, **Belt channel**, **Bolt -22 -21**, **Counterbore -22 -21**, **Bolt -22 21**, **Counterbore -22 21**, **Bolt 22 -21**, **Counterbore 22 -21**, **Bolt 22 21**, **Counterbore 22 21** from **Carriage blank**, consuming the tools; name the result **Rod carriage**.

## Public controls

| Control | Default | Range | Step | Meaning |
| --- | ---: | --- | ---: | --- |
| Left rod bore radius | 6.2 | 6–7 | 0.1 | Radius including the intended sliding allowance. |
| Right rod bore radius | 6.2 | 6–7 | 0.1 | Radius including the intended sliding allowance. |
| Belt passage width | 10 | 8–16 | 1 | Width of the central belt passage. |

All unlisted dimensions, topology and feature order remain fixed. Radius controls are radii, not diameters. These are independent numeric ranges; do not introduce unsupported formula bindings or assume a fit standard from an example value.

Adjustable dimensions

Parameter	Default	Range	Step
Left rod bore radius	6.2 mm	6–7 mm	0.1 mm
Right rod bore radius	6.2 mm	6–7 mm	0.1 mm
Belt passage width	10 mm	8–16 mm	1 mm