Replacement Nerdy Gurdy crank, a 3D-printed hurdy-gurdy part
Image: Jakub via Printables, CC0
Strings · Hurdy-gurdy part

Replacement Nerdy Gurdy crank

A printed replacement for the Nerdy Gurdy's laser-cut crank, for a smooth shaft

Designed by Jakub, published on Printables

CC0 Commercial use OK Build info 1/5

Licence verified on Printables, 20 October 2026.

Print
About 14 g of PLA and 20 minutes (Printables metadata)
Hardware
Shaft collar: 8 mm bore, 14 mm outside, M4 set screw
Difficulty
Easy
On Printables
0 likes · 16 downloads · 0 makes · 0 comments (as of 20 Oct 2026)

About the Nerdy Gurdy crank

The Nerdy Gurdy (also in the library) is an open-source hurdy-gurdy whose crank is normally laser-cut. This printed version replaces it and is adapted for a smooth shaft.

It holds a standard shaft collar with an 8 mm bore, 14 mm outside diameter and an M4 set screw, which grips the shaft.

What you'll need

Printed parts

  • The crank

Bought parts

  • A shaft collar: 8 mm bore, 14 mm OD, M4 set screw

Tools

  • A hex key for the set screw

Build overview

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