Blurolls X/Y Linear Rail Kit for Neptune 3 and 4

A Blurolls kit that swaps the V-slot rollers on both axes — X and Y — for linear rails with carriage blocks. Rollers wear unevenly, the carriage starts to rock, and the print shows it: ringing behind corners, waviness across flat walls, and perimeters that measure differently on the left and right. On rails the gantry stays rigid and you can push acceleration without losing geometry. This is a mod, not a spare: fitting it means stripping the gantry and the bed.

Specifications

• Steel rails with carriage blocks for the X and Y axes
• Machined adapter plates and all hardware included
• Third-party Blurolls mod, not a genuine ELEGOO part
• Belt tension, mesh leveling and Z-offset all need redoing afterwards

Compatibility: ELEGOO Neptune 3, Neptune 3 Pro, Neptune 4, Neptune 4 Plus and Neptune 4 Max. The seller splits the kit into options — X only, Y only, or both — so pick by your model; the 225 mm and 420 mm machines take different rail lengths.