Kossel 2020 XL heated bed holder / adapter

by rmoro, published

Kossel 2020 XL heated bed holder / adapter by rmoro Dec 17, 2016


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I had the heated bed mounted to my printer MacGyver style, using clamps to mount the bed to the frame and bulldog clips to hold the glass to the bed. See the photo's. It made the printer look cheap, and I could not wire up the heated bed because its connections were clamped to the printer frame. These adapters solve all the problems above. With these adapters, you can wire up the heated bed, and the printer instantaneously looks 500€ more expensive :-)


The parts you need

  • 3x heated bed adapter (one with space for the wires)
  • 3x heated bed adapter cap
  • Kossel XL
  • Round heated bed with ears for Delta Rostock / Reprap Ø 265 mm
  • Glass plate Ø 260 mm
  • 6x M3, 8 mm screws
  • 6x M3 nut
  • 12x M4, 12 mm countersunk screws
  • 6x M4 nut
  • 6x M4 (hammer) T-nut

Build instructions

Solder a thermistor to the heated bed and fixate it with kapton tape. Wire up the heated bed and thermistor to the electronics of your printer.

Place the M3 and M4 nuts in the adapters. Mount the heated bed to the adapters using the M3 bolts. Mount the heated bed with the adapters to the printer frame using the M4 bolts and (hammer) T-nuts. Mount the glass plate using the adapter caps and M4 nuts.

Note: the pile of parts in the last photo were created during the prototyping process.

If you only use the heated bed for PLA (recommend bed temperature 20-35C) you could use PLA, otherwise I recommend using PETG or ABS for the adapters.


Calibrate you printer before usage! Remember that your bed is lifted around 5 mm.

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Hello, this is a very nice design, I was wondering if you used any kind of insulation under the heated bed for protecting the electronics ?

do you know how long the size extrusions are? 360mm?

The side bars are 360 mm indeed.

What heat bed did you use?

I have uploaded two extra images of the heated bed. Search ebay / aliexpress for 'Round heated bed with ears for Delta Rostock'