Sixth-generation dual thrust bearing tension and compression resistant Z-axis lead screw deformation decoupling structure

This version is further optimized based on Muzi Xiaoyang it uses flat needle roller thrust bearings instead of thick and expensive thrust ball bearings with the thickness optimized from 31mm to 27mm further reducing the negative impact on Z-axis travel This bearing-based solution is more reliable and slides more smoothly than the cheap brass cross-couplers found online Moreover this device can be inserted into the lead screw nut its overall height is very close to a cross-coupler with minimal impact on Z-axis travel

It is recommended to print with ABS in actual tests with an 80-degree heated bed the location of this structural part is around 60 degrees which is close to the PETG limit

When printing the position with hexagonal holes should be used as the bottom surface requiring supports It is recommended to halve the layer height and double the line width to improve quality or use dual-material supports for quick removal The rest is almost identical to the original version it is recommended to check out the original version first

After installation and testing it is recommended to add a generous amount of lubricant

One piece is enough for the top and bottom parts two pieces need to be printed for the middle then glued together with 3M super glue or AB glue It might also work without gluing

M3*6*4.5 heat-set inserts * 8 for fixing the lead screw nut and the holder
M3*14 flat head hex socket partial thread screws (ultra-thin head head thickness around 1mm) * 4 The original partial thread screw heads were too thick so thin heads must be used
M3 nylon lock nuts * 4
AXK1020+2AS size 10*20*4mm * 2 these are flat needle roller bearings do not buy ball bearings