K1 max clicking noise from the bearings(maybe)

Flagship K Series Creality Flagship K1 Max
1

Hello everyone,

I’m having an issue with the Y-axis on my printer, and after further inspection, the problem seems to come specifically from the lower bearing on the Y-axis assembly — possibly even the tensioner pulley itself.

I’ve had this printer for about a year, so I understand that parts can wear out or develop issues over time.

The movement feels okay overall, but during slower travel movements there is a noticeable clicking noise that doesn’t seem normal.

I already checked:

  • Belt tension

  • Rail alignment

  • Frame squareness

  • Screw tightness and wheel adjustment

Everything else appears fine. The issue seems concentrated in the lower bearing area, or possibly the tensioner pulley bearing.

When moving the bed by hand, the movement feels smooth overall, but the clicking noise seems to come specifically from that section.

Has anyone experienced worn or defective bearings, or a failing tensioner pulley on the Y-axis?
Did replacing that part solve the issue?

I’d also like to know exactly which replacement part I should buy, and if possible, whether anyone has found a good video tutorial showing how to replace it.

Thanks in advance.

2

Hi Leonardo,

That clicking noise during slow Y-axis travel is a known issue on the K1 series, and you’ve already done a great job ruling out the basic frame and belt alignment steps.

Since the movement still feels smooth by hand but clicks under slow, tensioned movement, the issue is almost certainly a failing internal bearing inside one of the Y-axis idler pulleys (tensioners) rather than the linear gantry bearings. When the internal balls develop flat spots or lose factory grease, they click under the specific load of the belts.

As a quick temporary diagnostic step before tearing it down, you can apply a single drop of lightweight bearing oil (like Super Lube or 3-in-1 oil) directly into the shield of the suspected pulley bearing. If the clicking stops or changes pitch temporarily, you’ve officially found your culprit and can proceed with ordering the replacement part!

Best of luck getting it sorted out!

MAC486