This upgrade intends to improve the stiffness of the AM8 Y Axis. The goal was to keep AM8 compatibility while increasing the Y stiffness, especially when using longer Y rods for a 300x200 bed. In my case the Y rods are 480mm long.
I'm using these housings along with the 12mm upgrade:
You might have to build your own endstop bracket to make the stock Y endstop work properly. I've also attached my rod holder for an optical endstop (made by BIQU) and my y endstop bracket for the optical endstop.
You will need these parts additionally to the printed ones, you should have most of them already on your AM8:
To assemble the rods:
2x 12mm linear rod in your desired length (same as frame depth)
8x screw for slot nut
8x slot nut
4x M3x20 ISO 4762 to secure rods
4x M3 DIN 934 nut
To mount the linear bearing housings on the H plate:
16x M4x10 ISO 4762 screw (the stock anet a8 screws will fit)
16x M4 DIN 934 nut
Remix & Sources
There are STEP sources available in the files section. Happy to see improvements and remixes of this Y rework :)
Assemble like the regular/stock AM8 8mm rods.
You might also want to have a look at:
my reinforced Z axis with 12mm linear rods
my horizontal Y belt upgrade
my SC8UU compatible 12mm housings for sinter bearings:
The upgraded X axis with 12mm rods
The reinforced X tensioner using proper bearings and a motor pulley: