Is this 3D model free to download?

Yes, KNRLR - a tool for making knurled bolts which are actually spiky is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Thingiverse. Use the "Download from Thingiverse" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by chopmeister, published on Thingiverse. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

KNRLR - a tool for making knurled bolts which are actually spiky 3D printable model by chopmeister

KNRLR - a tool for making knurled bolts which are actually spiky photo 1

KNRLR - a tool for making knurled bolts which are actually spiky photo 2

KNRLR - a tool for making knurled bolts which are actually spiky photo 3

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KNRLR - a tool for making knurled bolts which are actually spiky

Source: Thingiverse by chopmeister

The KNRLR - a tool for making knurled bolts which are actually spiky is a free printable 3D model from Thingiverse by chopmeister. This nice thing attaches to your Dremel and lets you make your own M8 knurled bolts for your extruder. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

3,382 saves Source: Thingiverse Updated 2026-11-02 License: CC-BY · commercial OK 9 makes Category: Tools & Workshop

Tags: 3dsmax, 3DS MAX, bolt, cutting, dremel, hobbed, knurled, tool

About this model

This nice thing attaches to your Dremel and lets you make your own M8 knurled bolts for your extruder. Technically speaking it's a "spiked" bolt, not a knurled one, but it's close enough. :) And yes, the name is supercheesy, but I like it anyway. I made this because the standard Ultimaker knurled bolt doesn't fit the extruder I'm currently designing. It's modelled in 3dsmax, so no openscad files, sorry :( If anybody wants to make a parametric version be my guest.

Frequently asked questions

Is this 3D model free to download?: Yes. KNRLR - a tool for making knurled bolts which are actually spiky is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by chopmeister.
Who made this model?: Designed by chopmeister, published on Thingiverse. Please credit the creator when sharing your print online.
Can I print this at home?: Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.

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KNRLR - a tool for making knurled bolts which are actually spiky

About this model

Frequently asked questions

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