Knurling bolt and nut

by akira3dp0, published

Knurling bolt and nut by akira3dp0 Apr 2, 2016

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<UPDATE Sep 20,2016>
There are knurling bolts and a nut that modeling on Autodesk Fusion 360.
I got a inspiration form Knurled surface finishing library by aubenc. Thanks!

I've prepared a bolt of various lengths.
So, print a bolt you want.

Bolts are M15, pitch 2.0, length 20, 30, 40, 50, 60mm, and Head OD 30mm, height 20mm.
A nut is M14, pitch 2.0, height 20mm.

See my YouTube about how to making a knurling on Fusion 360 Modeling a knurling on Autodesk Fusion 360

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Nice job. I scaled the nut to 30.5mm both x and y axis and it fits the bolt better.

Between the bolt and nut printed original size with my printer is smooth.
I would appreciate it if you could change some setting and print again.

I actually used your video to do some knurled components before ever finding this post!

What would be really cool would to be able to get different M sizes for the bolts and nuts.

I am glad that my Youtube video was useful for you.
The difference of M sizes between bolt and nut was calculated automatically by Autodesk Fusion 360.
So the size of the base cylinder for bolt and hole for nut are same.

I understand the difference in the nut/bolt size. What I meant is that the bolt/nut are M15 size, it would be nice to be able to make them in different sizes. So let's say I need M6 size, it would be great to be able to specify and do it.

Anyway these are really good.

Oops, I am sorry for making some mistake. English is difficult for me.
OK, I will make the bolt and nut you want.

Thanks, my pleasure!

Work really well, thank you!

Thanks, JorgTheElder !

Mr. Akira,

If it is not too difficult, would appreciate if you can make 40mm, 50mm and 60mm models.

Thanks and regards,

OK, I did. Here you go!

Oh Great! Thank you very very very much Akira-san.


A little tight in ABS but printed nice none the less.
.2mm layers on a Makerfarm i3 8"

Print out, they are beautiful and clean looking, well done

Thanks wwwayne! Your avatar icon is so nice.

Too tight in petg :(

Is petg filament high hardness?

I dont know if it is hard against diamond or chalk, but I can tell that it has a high resistance to flex :D

This is really nice and the how-to video is super-interesting! I have been wondering how to make these simple repeating patters (like the grip outside of the nut) and threads.

Thank you so much, timppajee! I had same wonder like you. I saw the how-to video about making a knurling bolt on anoter 3Dcad Solid Works, on YouTube. But it is some difficutlty on Fusion 360. So I had thought making it on Fusion 360 by trial and error. But making Threads on Fusion 360 is easy.

Printed it in PLA and everything looks fine, though the bolt is slightly too large to fit into the nut.

Any idea what could be causing this?

.2 layer height at 2400mm/min

Umm, I have no idea.
Now I add the bolt that screw length is same as the nut.
Thanks Electrichammer!

Figured out why it wasn't working (along with many other prints that had to fit together!).

Turns our for some reason Simplify3D was adding about a 1mm thickness to all my prints. Still don't know why, though works well through any other slicer.


Oops, I misunderstood your comment.
I think the extrusion rates of filament on your 3dprinter is little big. So the extruded filament from a nozzle is more fat than the nozzle diameter. As a result, the bolt is slightly too large and the hole of nut is slightly too small.
Please check and calibrate about your 3dprinter, one is a feedrate of steppermotor for extruder on your firmware, another is a extrution multiplier of your slicer.

Wow, what printer have you used? :D!

Prusa Mendel i2 I built ;-)

Awesome quality! I love it, I built a prusa i3, but the quality is poor, is too far away from yours prints quality, can you tell me about your printer settings? nozzle diameter, layer height, speed, thanks!

Thanks your comment.
Nozzle diameter: 0.4mm, layer height: 0.1mm, print speed: 50mm/s (outer shell speed:40mm/s).
I think lower nozzle temparature is better. I set 200-210˚c for ABS filament.
And turn cooling fan on.
There are so many small overhangs, so thinner layer make printing more beautiful.
Good printing, ea00d009!!

Cooling fan on using ABS? but how avoid the warping problems or splitting layers? I'm sorry about my basic english... thanks!

Sorry, we may not to cooling for ABS filaments. But I always turn fan on.
There is no warping and splitting, because I have calibrated my printer, especially about a distance from nozzle to bed, filament extrude rate. Oh I use glue stick for a glass on the heated bed. And if I print the model shape that will wrap, I use brim.