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Set Screw Sizing
 
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comedyaddict
 comedyaddict
(@comedyaddict)
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Set Screw Sizing

Hi all,

I'm feeling a bit stupid tonight, but I accidently lost the set screws that hold the Y-axis gear to the stepper motor. I don't appear to have any spares in my parts bin to replace them with nor see them on the Prusa site. A somewhat close 3d printer store has some, but in a wide range of sizes. Does any one know what the correct size that is required?

Thanks

Posted : 05/09/2025 12:54 am
JoanTabb
 JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Set Screw Sizing

I believe the Toothed belt pulley grub screw is an M3 x3mm grub screw 
Metric 3mm  thread, 3mm long. 
regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility.Location Halifax UK

Posted : 05/09/2025 1:06 am
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comedyaddict
 comedyaddict
(@comedyaddict)
Member
Topic starter answered:
RE: Set Screw Sizing

Thanks, turns out that's not one of the sizes available from the nearby store, so time to buy a multi-pack of various sizes from Amazon.

Posted : 05/09/2025 2:29 am
JoanTabb
 JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Set Screw Sizing

M3x2 would work ok
Regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility.Location Halifax UK

Posted : 05/09/2025 7:55 am
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