cad_models/space_pi_se_PTFE_stopper.py

# /// script
# requires-python = ">=3.14"
# dependencies = ["ocp_vscode", "build123d"]
# ///

from build123d import *
from ocp_vscode import *

### Dimensions ###
diameter_at_hole = 5.5 * MM
ptfe_length = 5 * MM
filament_length = 5 * MM
diameter_at_filament = 3 * MM
washer_thickness = 2 * MM
###################

with BuildPart() as stopper:
    with BuildSketch() as sketch:
        Circle(diameter_at_hole / 2.0 + 2 * MM)
        Circle(diameter_at_hole / 2.0, mode=Mode.SUBTRACT)
    extrude(amount=washer_thickness)
    with BuildSketch(Plane.XY.offset(washer_thickness)) as sketch:
        Circle(diameter_at_hole / 2.0 + 0.5 * MM)
        Circle(diameter_at_hole / 2.0, mode=Mode.SUBTRACT)
    extrude(amount=ptfe_length)
    z_offset = ptfe_length + washer_thickness
    with BuildSketch(Plane.XY.offset(z_offset)) as sketch:
        Circle(diameter_at_hole / 2.0 + 0.5 * MM)
        Circle(diameter_at_hole / 2.0, mode=Mode.SUBTRACT)
    z_offset += filament_length
    with BuildSketch(Plane.XY.offset(z_offset)) as sketch:
        Circle(diameter_at_filament / 2.0 + 0.5 * MM)
        Circle(diameter_at_filament / 2.0, mode=Mode.SUBTRACT)
    loft()
    with BuildSketch(Plane.XZ) as sketch:
        with Locations((0, z_offset)):
            with BuildLine():
                l1 = RadiusArc(
                    (diameter_at_filament / 2.0, 0), (diameter_at_hole / 2, 1), radius=1
                )
                offset(amount=0.5 * MM, side=Side.RIGHT)
            make_face()
    revolve(axis=Axis.Z)
    show(stopper)

export_stl(stopper.part, "stopper.stl")