Home JGAurora A5 & A3S Modifications & Upgrades

Size of bed screws and knobs for A5?

My knobs are slipping from the screws on my printing bed. I would like to know if anyone knows the exact size of the bed screw and knob so i can purchase better parts.


  • DaHaiDaHai Posts: 36🌟 Super Member 🌟
    The screws are m3x35 and the nobs are just m3 brass thread inserts on thumb knobs.  You can find different sized knobs on thingiverse and get longer flat head hex m3 screws for it.
    Also, you might try lowering the Z-Endstop switch so you can lower the bed and not have the knobs fall off. its located inside the right vertical frame - white 3d printed plastic with two screws holding it to the frame. It has long slots so you can  loosen the screws and move it up and down to adjust the Z-endstop height.  Just lower it a couple mm and see if that helps. 
    You'll need to re-level the bed again - of course
    Thanked by 1aemam
  • davidtriunedavidtriune Posts: 16Member
    wonder why they didn't use thicker screws? my knobs are wearing out also. for this, i ditched springs for a spacer and used a probe instead.
  • I designed a modification using M3 nuts as insert on pla knobs
    stl file in https://www.thingiverse.com/thing:3001569
    if you have any issue just leave a comment on the thingverse file and I will try to help
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