Models Showcase: free 3D-printable organizers

By Krypto

Complexity

Simple

Others Music & audio

0

MAIN PURPOSE: Make a spare capo from a hair tie

Press the padded bar across the frets and loop a hair tie from one end notch, under the neck, to the other: a capo that weighs nothing, fits any neck width up to 56 mm and costs pennies, ideal as a spare in every gig bag.

Printing notes

6.9 cm³

Volume

8.6 g

Est. weight

440

Triangles

PETG; add a strip of bike inner tube as the pad. Prints as shown on its outline, no supports.

AR view Open in app

By Krypto

Complexity

Simple

Others Science & education

0

Kamal latitude finder

MAIN PURPOSE: Measure latitude from the Pole Star

The card Arab navigators used to find latitude: hold the knotted cord in your teeth, push the card out until the bottom edge sits on the horizon and the top edge touches the Pole Star. A knot for each place you know becomes a latitude scale.

Printing notes

6.9 cm³

Volume

8.6 g

Est. weight

2,564

Triangles

Tie a 60 cm cord through the centre hole. Prints flat as a plate, no supports.

AR view Open in app

By Krypto

Complexity

Simple

Others Science & education

0

Litre cube

MAIN PURPOSE: Show that a litre is a 10 cm cube

A hollow cube exactly 10 cm inside in every direction: fill it with water from a measuring jug and children see that one litre and 1000 cubic centimetres are the same thing, then weigh it and meet the kilogram too.

Printing notes

23.0 cm³

Volume

28.6 g

Est. weight

9,428

Triangles

PETG with solid walls so it holds water; check the inside is 100 mm. Prints as shown on its floor, no supports.

AR view Open in app

Preview of Leeuwenhoek ball-lens microscope

By Krypto

Complexity

Simple

Others Science & education

0

Leeuwenhoek ball-lens microscope

MAIN PURPOSE: See cells with a single glass bead lens

A slide-sized plate with seats for a 2 mm and a 3 mm glass bead, the trick Antonie van Leeuwenhoek used in the 1670s: tape a specimen to the back, hold the bead to your eye and see cells at up to 150 times, with a lens that cost almost nothing.

Printing notes

3.9 cm³

Volume

4.9 g

Est. weight

5,148

Triangles

Glue in 2 mm and 3 mm glass beads. Prints flat as a plate, no supports.

AR view Open in app

Preview of Eureka overflow can for rock density

By Krypto

Complexity

Simple

Others Science & education

0

Eureka overflow can for rock density

MAIN PURPOSE: Measure rock volume and density by displacement

Fill the can until water runs from the spout, lower in a rock on a thread and catch the overflow in a measuring cylinder: that is the rock volume. Divide its weight by it and pupils can tell granite from basalt from a lump of pyrite by density alone.

Printing notes

14.5 cm³

Volume

18.0 g

Est. weight

2,684

Triangles

PETG, 3 walls; push a short drinking straw into the spout. Prints as shown on its floor, no supports.

AR view Open in app

By Krypto

Complexity

Simple

Others Science & education

0

Newton colour wheel spinner

MAIN PURPOSE: Show that the spectrum colours mix to white

Colour the seven ribbed sectors red, orange, yellow, green, blue, indigo and violet, push a pencil through the centre and spin it like a top: the colours blend into a pale grey white, Newton's proof that white light is all the colours together.

Printing notes

20.0 cm³

Volume

24.9 g

Est. weight

1,708

Triangles

White PLA, colour it with markers. Prints as shown on its floor, no supports.

AR view Open in app

By Krypto

Complexity

Simple

Others Pets & aquarium

0

Reptile humid hide rock

MAIN PURPOSE: Give a reptile a humid hide for shedding

A rock-shaped shell with a 50 mm entrance in its crown: pack it with damp sphagnum moss and geckos and snakes get the humid retreat they need to shed cleanly. It has no floor, so you lift the whole rock to mist and check the moss. Print it as shown, then turn it over so the floor becomes the top.

Printing notes

145.5 cm³

Volume

180.5 g

Est. weight

1,204

Triangles

PETG; matt stone-coloured filament looks most natural. Print floor-down as shown, then turn it over to use it.

AR view Open in app

By Krypto

Complexity

Simple

Kitchen Food preparation

0

Corn cob stripping bowl

MAIN PURPOSE: Cut kernels off a corn cob without the mess

Stand the cob on the 28 mm hub and run a knife down it: the hub holds the cob upright and steady, the four spokes brace it and split the bowl into quarters, and the kernels land in the 170 mm bowl instead of across the worktop. The same hub steadies a cob for buttering.

Printing notes

154.5 cm³

Volume

191.6 g

Est. weight

1,504

Triangles

Food-safe PETG. Prints as shown on its floor, no supports.

AR view Open in app

By Krypto

Complexity

Simple

Kitchen Food preparation

0

Rice cooking water dipstick

MAIN PURPOSE: Add exactly the right water to rice

Level the rinsed rice in the pan, stand the foot on the surface and pour water until it reaches the right notch: 15 mm for jasmine and sushi rice, 20 mm for long grain, 25 mm for brown. Measuring the depth above the rice works for any pan and any amount, which cup ratios never do.

Printing notes

8.8 cm³

Volume

11.0 g

Est. weight

11,304

Triangles

Food-safe PETG. Prints flat as a plate, no supports.

AR view Open in app

By Krypto

Complexity

Simple

Kitchen Food preparation

0

Hasselback potato cradle

MAIN PURPOSE: Slice potatoes deep without cutting through

Lay a potato in the curved trough and slice across it every few millimetres: the knife lands on the two 10 mm rails before it reaches the bottom, so every cut stops at the same depth and the potato stays in one fanned piece. Works for accordion cucumbers and courgettes too.

Printing notes

31.8 cm³

Volume

39.5 g

Est. weight

1,364

Triangles

Food-safe PETG. Prints as shown on its floor, no supports.

AR view Open in app