Railway End Table Powered By Hand Crank

https://fed.brid.gy/r/https://hackaday.com/2026/03/05/railway-end-table-powered-by-hand-crank/

RE: https://mastodon.social/@inkican/115740750179138425

Tagging for #SolarPunkSunday !

"A former Dyson engineer is rolling out a revolution for household chores in deprived communities after inventing an off-grid, flat-packable washing machine

Some five billion people in remote and developing regions still wash their clothes by hand. It’s a task that unfairly burdens women and young girls, who can spend up to 20 hours a week on the chore.

Enter Navjot Sawhney, who founded the UK-based social enterprise The Washing Machine Project (TWMP) to tackle this, and has now shipped almost 500 of his #handcrank #Divya machines to 13 countries, including Mexico, Ghana, Iraq and the US.

The Divya washing machine, made up of an outer drum and an inner one which rotates, operates a 30-minute wash cycle where it completes a 5kg load needing only a few minutes of manual turning."

#ClothesWashing #OffGrid

Julia, handcranking apple juice, from pulp.

#LifecyclesProject #ViewRoyal #volunteering #FoodSecurity #Wsanec #Saanich #Lekwungen #VictoriaBC #Grassroots #NonProfit #CommunityOrchard #CommunityFood #LegacyPark #CommunityBased #VancouverIsland #VanIsle #PacificNorthwest #PNW #fruits #FruitTrees #orchard #FoodTrees #GrowingFood #GrowingFruits #volunteers #CommunityWork #harvest #ApplePress #MakingJuice #WellandCommunityOrchard #FreeEvent #HandCrank #ManualJuicing #FreshlySqueezed #AppleJuice

Ready For The Rapture: This Wind-Up Cassette Player Can Play Anywhere

#reverseengineering #teardown #handcrank #handgenerator #windup #hackaday

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hackaday.com/2023/10/17/ready-…

7000 RPM on a 3D-Printed Gearbox

[Steven] at the 3D Printer Academy has been working on a variety of different gear designs. He recently embarked on a series of experiments to see how fast he can spin a 3D-printed gearbox.

After testing several kinds of gear teeth, gear diameters, and gear spacing, he finally struck upon an 81:1 ratio gearbox. It has six gears: five stepped gears and one drive gear on the input shaft. First tests are accomplished with a 3D-printed handle, similar to a hand crank used to start really old cars. But unlike those cranks, [Steven]'s doesn't have any release provision. While the handle can be removed, it can't be removed while spinning.

We think it would be helpful to revise the drive shaft coupling method, allowing the handle or drill to be easily removed from the gearbox once it's attained speed. This would be more convenient, and it seems prudent from the workbench safety point of view as well.

Example of a crank quick release mechanism

[Steven] manages to get the final gear spinning at 7000 RPM in video #2 of the series by hand cranking it "as fast as he can", a speed measured by using the metronome app on his smartphone. He begins driving the gearbox with an electric drill in video #3, with some mixed but promising results. We think he will ultimately succeed in his goal of a high-speed, electric-drill-driven gearbox after a few more tests. If you want to have a go at this yourself, the design files are posted online.

How fast do you think he can eventually get this gearbox spinning? Are there any physical limitations of the assembly or due to the 3D printing materials/process? We certainly know that high torque can tear 3D-printed gearboxes apart, but how does the speed affect things? Let us know in the comments below.

#techhacks #3dprintedgears #gearbox #handcrank

razor blade sharpener...

#razorblade #sharpener #crank #cranking #handcrank #animatedgif

razor blade sharpener...

#razorblade #sharpener #crank #cranking #handcrank #animatedgif