Bambu Lab X1C Bed Leveling Knob

After the plastic housing one of my bed tramming/leveling knobs broke off randomly during a print, I contacted Bambu Labs to see if I could get a replacement.  Long story short, they don't sell the knobs separately, you'd have to buy the entire bed assembly.  I was kindly told by customer care that I could tram the bed without the plastic housing by turning the knurled insert with broken plastic on it.  While technically true, it's a pain both literally and figuratively.

After accepting the fact that Bambu doesn't love me as much as I have loved their printers, I set out to find a replacement.  None of the usual model sites had anything I liked , so I decided to created my own.  Isn't that why we got into 3D printing in the first place?!?  I made this version a little taller so it's easier to grab and turn, but otherwise very similar to the stock ones.

For printing, I used HT PLA and PETG, but PETG/ABS/ASA would all be good options since you are near the heated bed.  I printed these as solid pieces (100% infill with 5-6 walls). They only use around 2g of filament, so wanted the added strength.

There are two versions (Narrow and Insert).  You can use each of them per the instructions below:

• Insert Version (recommended): The hole is set to accommodate an M5 knurled (melt in) insert and is large enough to help align the insert.  I found the M5 x 8mm long worked best.  The larger opening prevents melted plastic from clogging the threads in the insert.

• Narrow Version: You can use this version if you'd like to thread the part itself (with a tap or self tapping screw).  You'll need standard M5 threads.  I tried the insert on this version and it clogs up with plastic and is unusable without a lot of effort to clean it.  

I hope you find the model useful and give it a like it you do!

Happy printing!