Mechanical 40-Quarter Dispenser

A fully mechanical, gravity-fed coin magazine tailored for standard U.S. quarters. Designed to slip into a pool cue bag, it stores a full $10 roll vertically and cleanly dispenses exactly $1 (four quarters) per cycle into the palm of the hand.

The mechanism relies on a two-stage sliding escapement. In the resting position, the bottom four coins sit perfectly flush inside the 7.2mm-thick slider pocket. When the thumb tab is pulled outward, a chamfered ramp on the top trailing edge of the pocket catches the fifth quarter and guides it smoothly onto the solid tail of the slider, suspending the rest of the stack. Once the pocket aligns with the drop chute at full extension, the isolated four quarters fall through. A captive printed pin mounted from the base runs in an internal track on the slider, acting as a hard travel limit for both the pull and return strokes.

Remix & Tuning Hooks

• Magazine Height: The tube is dimensioned at 75mm to easily clear forty 1.75mm-thick quarters. Snip the cylinder height in the code to make a shorter 20-coin version.
• Coin Bore: Currently 25.2mm to allow 0.47mm radial clearance for a 24.26mm quarter. Tweak this offset for other currencies or tokens.
• Slider Thickness: The exact 7.2mm thickness dictates the dispense count (four coins). Scaling this Z-dimension alters how many coins drop per pull.
• Tolerances: The slider track relies on a 28.5mm bridge in the main body. If your printer sags on bridges, the slider can be sanded lightly, or the track height (7.6mm) can be nudged up.