I bought a used table moulder Kity 629. Unfortunateyly, it came without any reduction rings to support the workpiece while using cutter heads with small diameter. So here you can find some replacement parts.
Three different versions with 75mm (minimum to allow the spindle shaft to move freely), 125mm and 155mm inner diameter are available.
I printed them with 0.3mm layer height and 30% infill in PETG.
The author marked this model as their own original creation.