Drill-Powered Caulk Gun with Gear Reducer

This is a drill-powered caulk gun with a compound gear mechanism that translates rotary motion into a strong linear push. 

The model includes two drill mounting options:

• A-type: Clamp-on mount for secure tightening
• B-type: Snap-fit quick attachment

Key features:

• The main rod uses a trapezoidal/threaded power screw that holds axial load efficiently
• The plunger is printed horizontally to ensure strength along the layers
• Gears, reducer housing, and piston are best printed in PETG and manually fitted for smoother motion
• All other parts can be printed with PLA
• Use M3x5x5 heat-set inserts (or smaller if needed) and M3 screws in sizes 8, 10, 12, 16, or 20mm — whatever you have at hand
• Thick grease is recommended for the gear train and threaded shaft

Print settings recommendations:

• Infill pattern: Gyroid, 10–25% (not critical)
• Wall count: Increase perimeter count for strength (I used 4) — that's what really matters
• Top/bottom layers: Consider increasing for additional structural integrity

STEP and F3D files are included to tweak dimensions if needed for your printer tolerances.

Related model: https://www.printables.com/model/1062157-electric-silicon-dispencer