Bambu Hubcap - AMS Lite Rotary Spool Lock

Shortly after mounting the AMS Lite to the top of my A1, a spool fell off while printing. A quick search led me to another model which seemed to work pretty well, but it was a bit longer than I wanted. So I shortened it, and made a couple other minor aesthetic changes.

Though I posted it, I wasn't really satisfied with it because it was a bit challenging to get the lock to seat properly. A couple days after posting it, someone reached out with an idea that would definitely improve it, so I made a quick mock-up. As I was testing it out, I realized that I could simplify the design, and hopefully make it both easier and more effective.

The Bambu AMS Lite Hubcap uses a simple twist lock to wedge under and expand the arms of the rotary spool holder, and provides a large surface area to keep most spools from sliding off.

Build Plates for 55mm Bambu Lap spools:

• Plate 1: The original with Bambu Labs logo (pictured green & orange):
  • This version is only for 55mm spools, like Bambu Labs spools
  • For spools 1 & 3
• Plate 2: The original with Bambu Labs logo (pictured green & orange):
  • This version is only for 55mm spools, like Bambu Labs spools
  • For spools 2 & 4
• Plate 3: The original version with numbers (pictured white):
  • Unlike the original with logo, this plate prints by layer, so all the hubcaps will print at the same time
  • This version is only for 55mm spools, like Bambu Labs spools
• Plate 4: Thicker version for 55mm spools (pictured gray):
  • If the spool slides forward too far, the rotors may expand, which may allow the spool lock to snap off
  • This version has added thickness to prevent this
  • This version is only for 55mm spools, like Bambu Labs spools
• Plate 5: Jumbo version for 55mm spools (pictured red):
  • Spools with a larger core that require spool adapters risk sliding off the adapter, past the hubcap
  • This version has added width to prevent this
  • The grip has been enhanced with deeper finger slots
  • This version is only for 55mm spool cores, similar to the Bambu Labs spool core

Build Plates for 58mm spools:

• Plate 6: Thicker version for 58mm spools (pictured gray):
  • If the spool slides forward too far, the rotors may expand, which may allow the spool lock to snap off
  • This version has added thickness to prevent this
  • This version is only for 58mm spools, like SUNLU spools with a spool adapter
• Plate 7: Jumbo version for 58mm spools (pictured red):
  • Spools with a larger core that require spool adapters risk sliding off the adapter, past the hubcap
  • This version has added width to prevent this
  • The grip has been enhanced with deeper finger slots
  • This version is only for 58mm spool cores, like SUNLU spools with a spool adapter

Build Plate for 61mm spools:

• Plate 8:  Extra-Jumbo version for 61mm spools (pictured blue):
  • Spools with a larger core but don't require spool adapters
  • This version has added width to prevent this, and added depth to keep them in place
  • The grip has the same deep finger slots as the jumbo
  • This version is only for 61mm spool cores, like Azure Film spools

Change History:

• 24/01/12: Created a mirrored hubcap for the counter-clockwise rotors (orange)
• 24/01/13: Added position numbers (inspired by @morgan.trebern's print)
• 24/01/13: Added a deep chamfer to keep the drag chain from catching on the edge
• 24/01/18: Added a groove in the fins to lock the rotor claws in place
• 24/08/08: Added a second plate with numbered hubcaps
• 24/11/14: Added a 2nd profile with options for 55mm (Bambu Lab) spools and 58mm (Sunlu with adapter) spools
  • Design updated to keep spools from sliding too far forward
• 24/12/25: Consolidated the profiles back into one and added an oversized version, also with 55mm and 58mm options, called Jumbo, for use with spools that have larger cores, requiring an adapter, and might slide past the hubcap (thanks to @insecta for requesting and testing)
• 25/10/01: Added a new oversized version for 61mm options, called Extra-Jumbo (thanks to @breker.phillip for requesting and testing)
• 26/01/05: Converted plate 1 from print by object to print by color, and split it to two plates, to enable the profile to be printed on A1