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+# make_herringbone_rack_rsolid
+
+## API Definition
+
+```python
+def make_herringbone_rack_rsolid(module: float, n_teeth: int = 10, pressure_angle: float = 20.0, helix_angle: float = 30.0, rack_height: float = 10.0) -> Solid
+```
+
+*Source: std/gear.py*
+
+## Import Surface
+
+- standard library: `import simplecadapi as scad` then `scad.std.gear.make_herringbone_rack_rsolid(...)`; direct submodule import: `from simplecadapi.std.gear import make_herringbone_rack_rsolid`
+
+## Description
+
+Create a herringbone rack.
+
+## Parameters
+
+### module
+
+- **Type**: `float`
+- **Description**: Gear module in mm (tooth pitch = pi * module).
+
+### n_teeth
+
+- **Type**: `int, default 10`
+- **Description**: Number of teeth along the rack.
+
+### pressure_angle
+
+- **Type**: `float, default 20`
+- **Description**: Pressure angle in degrees.
+
+### helix_angle
+
+- **Type**: `float, default 30`
+- **Description**: Helix angle of each half in degrees.
+
+### rack_height
+
+- **Type**: `float, default 10.0`
+- **Description**: Total rack thickness along Z in mm.