# Build list: Mug LTD (sits on a coffee mug) > What parts do I need to build a Stirling engine that sits on a coffee mug? - Category: Stirling engines › Guide - Kind: List / guide - Basis: Every part is a free file on this site. - Page: https://xemstudio.com/objects/list-ltd-mug/ · JSON: https://xemstudio.com/api/geometry?object=list-ltd-mug · Plain text: https://xemstudio.com/objects/list-ltd-mug/sheet.txt - License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses **Exact dimensions.** True size, with no printing tolerance added. ## Notes - - Numbers: Ø76 × 23 chamber · Ø72 × 6 displacer at 15 mm · 5 mL glass syringe (Ø12.60) at 15 mm · volume ratio 33 · Ø100 nut flywheel crank · both cranks overhung ## Sizes | subsystem | object | parts | qty | note | |---|---|---|---|---| | Hot plate | mug-ltd-bottom-plate | mug-ltd-bottom-plate-90 | 1 | rests on the mug rim | | Chamber | mug-ltd-chamber-ring | mug-ltd-chamber-ring-76-h23 | 1 | Ø76 × 23 | | Cold plate | mug-ltd-top-plate | mug-ltd-top-plate-90-glass5 | 1 | | | Displacer | mug-ltd-displacer | mug-ltd-displacer-72x6 | 1 | 2 radial gap | | Displacer rod | displacer-rods | rod-2x100 | 1 | through the displacer and the Ø2 guide | | Rod clevis | mug-ltd-rod-clevis | rod-clevis-2mm-p51 | 1 | on the rod top | | Power cylinder | glass-syringes | glass-syringe-5ml-barrel | 1 | in the top-plate socket, tip down | | Power piston | glass-syringes | glass-syringe-5ml-plunger | 1 | | | Plunger clevis | glass-syringe-plunger-clevis | plunger-clevis-glass-5ml | 1 | over the plunger collar | | Chamber screws | socket-head-cap-screws-metric | shcs-m3x30 | 5 | top plate and ring into the tapped bottom plate | | Pedestal screws | socket-head-cap-screws-metric | shcs-m3x8 | 2 | foot and top plate into the ring's tapped holes | | Crank pedestal | mug-ltd-crank-pedestal | mug-ltd-crank-pedestal | 1 | one piece | | Bearings | ball-bearings-metric | bearing-623 | 2 | one in each face of the block | | Shaft | dowel-pins-metric | dowel-3x30 | 1 | Ø3 × 30: flywheel hub to crank disc | | Flywheel crank | flywheel-crank | flywheel-crank-100-m8-b3-s15 | 1 | displacer crank, 7.5 throw | | Flywheel weights | hex-nut-weights | nut-m8 | 6 | alternate pockets | | Crank disc | crank-discs-3mm-bore | crank-disc-b3-stroke15 | 1 | power crank, 90° behind the flywheel pin | | Con-rods | pin-end-con-rods | conrod-45 | 2 | displacer and power | | Crank pin (flywheel) | dowel-pins-metric | dowel-3x16 | 1 | 10 in the hub, through the con-rod, 1 proud | | Pins | dowel-pins-metric | dowel-3x12 | 3 | power crank pin, two clevis pins | | Grub screw | set-screws-metric | set-m3x10 | 1 | crank disc | | Grub screw | set-screws-metric | set-m3x8 | 1 | flywheel hub | | Grub screw | set-screws-metric | set-m3x3 | 1 | plunger clevis | ## Where the files are - Long Earth Society: [Engine builds](https://longearthsociety.com/engineering/) — web, video — LES site ## Build order 1. Displacer on rod-2x100 (flush at the bottom); rod up through the top plate's Ø2 guide; rod clevis on its top. 2. Bottom plate, chamber ring and top plate: five M3 × 30 at 60°…300° from the top into the tapped bottom plate; crank pedestal with two M3 × 8 through its foot and the top plate into the ring. 3. plunger in; clevis cap on the plunger collar (grub). 4. Two 623s in the pedestal block; Ø3 × 30 shaft; flywheel crank (hub inward) on the displacer side, crank disc on the syringe side with its pin 90° behind the flywheel's pin; con-rods outboard on the pins; six M8 nuts. 5. Stand it on a mug of hot water. All printed STLs: https://xemstudio.com/objects/list-ltd-mug/stl-list.txt ## Questions **What parts do I need to build a Stirling engine that sits on a coffee mug?** 23 parts, every one a free STEP/STL on this site; see the table and the build order on this page. ## Fits with - [Mug LTD top plate Ø90 with rod guide and a 5 mL glass syringe socket](https://xemstudio.com/objects/mug-ltd-top-plate/) - [Glass syringes 1–50 mL (all-glass, ground-glass plunger): barrel and plunger](https://xemstudio.com/objects/glass-syringes/) - [Plunger clevis for a glass syringe: cap over the piston collar with a con-rod fork](https://xemstudio.com/objects/glass-syringe-plunger-clevis/) - [Build list: LTD coffee-cup engine](https://xemstudio.com/objects/list-ltd-coffee-cup/)