SIEG KX1 لولب كروي لماكينة CNC، المحور Z CLEARANCE

The threads on this replacement ball screw are noticeably cleaner than the original, which made installation much smoother. My Z-axis now moves without that annoying binding I’ve been fighting for months.

Took a while to get the old one off, but once this ball screw was in, the Z-axis felt noticeably tighter with zero of the slop I'd been fighting. The threads are clean and the fit on the 3501 was exact, so no shimming or fussing needed.

Installed this on my 3501 and the Z-axis backlash is basically gone now, zero play when I push on the spindle. The ball screw threads mate with the nut smoothly, no binding through the full travel range.