Half-metre trundle wheel — 3D-printable model preview

AR view

Science & education Medium

Half-metre trundle wheel

Measure distances by counting wheel turns

A 159.2 mm wheel with a circumference of exactly 500 mm: push it along the playground on a dowel axle and count the turns, two per metre. A hands-on way to meet pi and to measure distances too long for a ruler.

Customize this model

Size: Ø 159 mm, 16 mm tall
Shape: Round
Walls: 2.4 mm
Volume: 80.1 cm³
Est. weight (PLA): 99.4 g
Parts to print: 1
Category: Science & education
Made by: Krypto
Built in: 23 steps

What’s in it

Round, Ø 159 mm, 16 mm tall, with 2.4 mm walls
Radial dividers making 6 wedge-shaped sections
1 hole in the floor
Engraved text: “50 CM”, “Label”

How to print it

Use an 8 mm dowel through the hub as the handle.

Prints as shown on its floor, no supports.

Filament: at most about 99.4 g of PLA printed solid (roughly $1.99 at $20 per kg); normal infill uses less.

To get the files, open it in the generator and choose File › Download STL (one file per part) or Download 3MF (every part on one plate).

Questions

What size is the half-metre trundle wheel model?

The half-metre trundle wheel model measures Ø 159 mm, 16 mm tall. You can change every size in the free SO3D.xyz generator before you download it.

Does it need supports?

No. Use an 8 mm dowel through the hub as the handle. Prints as shown on its floor, no supports.

How much filament does it use?

At most about 99.4 g of PLA (80.1 cm³ printed solid), roughly $1.99 of filament at $20 per kg. Normal infill uses less.

Can I change it?

Yes. Open it in the SO3D.xyz generator (free, in your browser), change the size, walls, dividers, holes, text or anything else, then download it as STL or 3MF for your slicer.

More science & education

Newton colour wheel spinner

Show that the spectrum colours mix to white

Simple

Kaleidoscope body for three mirror strips

Make a kaleidoscope

Multi-part assembly

Weather sensor radiation shield

Shield a weather sensor from sun and rain

Multi-part assembly

Eclipse viewer frame

Hold solar viewing film safely

Medium

Water clock

Measure time with dripping water

Medium

Litre cube

Show that a litre is a 10 cm cube

Simple

Telescope solar projection box

Watch the Sun safely by projection

Medium

Kamal latitude finder

Measure latitude from the Pole Star

Simple

See all 71 in Science & education

Make it fit your space

Change the size, walls, dividers, holes and labels of the half-metre trundle wheel model in your browser, then download it for your printer. Free, no CAD needed.

Customize this model