Free 3D Printing Models:
Helical Gear Toy 3D Model:
Print two (2) each of the gear and fender washer and one (1) Holder and one (1) press in shaft. This toy is best if the gears are a different color. The screws are M3x8mm WN5451 screws for plastics but a similarly sized wood or sheet metal screw might work.

HelicalGearToy_Holder90Deg.step |

HelicalGearToy_PressInShaft.step |

HelicalGearToy_FenderWasher.step |

HelicalGearToy_Gear.step |
Hydraulic Bottle Jack Knob 3D model:

HydraulicKnob.stl |
Fancy slip-on foot 3D model for wooden 2x4 end:

TwoByFourFoot.stl |
4-9DB Bin Box Divider 3D model for Argrov Box (or similar) Bins:

4-9DB_BinBox.stl |
Parametric FreeCAD 1.0 file for making bin box dividers like above but of any size (like Argrov 4-DB):

BinBoxesParametric.FCStd |
Replacement Feet for the HP9810A Calculator 3D Model (Resin Printed):

left_foot_03.stl |

right_foot_03.stl |
Tool caddy 3D model for Ruthex type heat set insert soldering iron tips
using (7) M4x10mm screws, washers, and nuts
Optional: High temperature silicone caps for changing tips while they're still hot.
using (7) M4x10mm screws, washers, and nuts
Optional: High temperature silicone caps for changing tips while they're still hot.

heat_set_tool_holder.stl |