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DropCyl — Rotary Quarter Dispenser

Created today

Storage & Organizationcoin-dispenserquarter-holderrotary-mechanismmechanicaledcprint-in-place
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Description

DropCyl is a fully mechanical, gravity-fed coin magazine tailored for standard U.S. quarters. Designed to store a full $10 roll vertically, it now dispenses exactly $1 (four quarters) per cycle with a quick twist of the ribbed rotary drum. The iconic 8-ball viewing window punches cleanly through both sides, letting you check your count at a glance while keeping the footprint extremely compact.

Features

  • Rotary Drum Action: A reliable half-turn escapement that isolates and drops exactly four coins at a time.
  • Ergonomic Shell: Aggressive edge rounding on the base block and cap makes it comfortable to grip and slip into a bag.
  • Dual Windows: The signature 8-ball cutout is fully symmetrical, meaning you can check the magazine from any angle.
  • Travel Cap: A robust coarse-thread cap locks the stack down so it won't spill in transit.

Print Notes

  • Print the main body and cap standing upright.
  • The rotary drum should be printed flat on its base.
  • The captive limit pin drops into the bottom of the track during final assembly.

Images

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Mechanical 40-Quarter Dispenser

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 Threaded Cap: The top of the magazine tube now features a coarse 4mm-pitch thread, securing the cap firmly for travel. 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.

17 hours agoRemix →