Stepped collet and bit station

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 **Foot**, a 150 × 80 × 8 box, centered at X=0, Y=0, with its bottom at Z=0.
2. Create **Socket block**, a 140 × 64 × 26 box, centered at X=0, Y=0, with its bottom at Z=8.
3. Create **Back rail**, a 140 × 6 × 36 box, centered at X=0, Y=29, with its bottom at Z=8.
4. Unite **Foot**, **Socket block**, **Back rail** as **Tool station blank**. Require one connected result.
5. Create **Bit 0**, radius 2, height 30, initially along +Z, with its base center at (-55, -14, 12).
6. Create **Tag 0**, a 14 × 2 × 8 box, centered at X=-55, Y=-32, with its bottom at Z=17.
7. Create **Bit 1**, radius 3, height 30, initially along +Z, with its base center at (-33, -14, 12).
8. Create **Tag 1**, a 14 × 2 × 8 box, centered at X=-33, Y=-32, with its bottom at Z=17.
9. Create **Bit 2**, radius 4, height 30, initially along +Z, with its base center at (-11, -14, 12).
10. Create **Tag 2**, a 14 × 2 × 8 box, centered at X=-11, Y=-32, with its bottom at Z=17.
11. Create **Bit 3**, radius 5, height 30, initially along +Z, with its base center at (11, -14, 12).
12. Create **Tag 3**, a 14 × 2 × 8 box, centered at X=11, Y=-32, with its bottom at Z=17.
13. Create **Bit 4**, radius 6, height 30, initially along +Z, with its base center at (33, -14, 12).
14. Create **Tag 4**, a 14 × 2 × 8 box, centered at X=33, Y=-32, with its bottom at Z=17.
15. Create **Bit 5**, radius 7, height 30, initially along +Z, with its base center at (55, -14, 12).
16. Create **Tag 5**, a 14 × 2 × 8 box, centered at X=55, Y=-32, with its bottom at Z=17.
17. Create **Collet -32**, radius 13, height 16, initially along +Z, with its base center at (-32, 15, 20).
18. Create **Collet 32**, radius 13, height 16, initially along +Z, with its base center at (32, 15, 20).
19. Create **Rail screw -65**, radius 2.5, height 12, initially along +Z, with its base center at (-65, 23, 38).
20. Rotate the current **Rail screw -65** solid -90 degrees around world X through [-65, 23, 38]. Resolve the actual current entity ID before the operation.
21. Create **Rail screw 65**, radius 2.5, height 12, initially along +Z, with its base center at (65, 23, 38).
22. Rotate the current **Rail screw 65** solid -90 degrees around world X through [65, 23, 38]. Resolve the actual current entity ID before the operation.
23. Subtract **Bit 0**, **Tag 0**, **Bit 1**, **Tag 1**, **Bit 2**, **Tag 2**, **Bit 3**, **Tag 3**, **Bit 4**, **Tag 4**, **Bit 5**, **Tag 5**, **Collet -32**, **Collet 32**, **Rail screw -65**, **Rail screw 65** from **Tool station blank**, consuming the tools; name the result **Collet bit station**.

## Public controls

| Control | Default | Range | Step | Meaning |
| --- | ---: | --- | ---: | --- |
| Bit 4 socket radius | 5 | 4–6 | 0.1 | Blind socket radius including the desired fit allowance. |
| Bit 5 socket radius | 6 | 5–7 | 0.1 | Blind socket radius including the desired fit allowance. |
| Bit 6 socket radius | 7 | 6–8 | 0.1 | Blind socket radius including the desired fit allowance. |

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.