螺絲，主軸套筒導件，HiTorque微型銑床

Finally, a spindle sleeve guide screw that actually stays put instead of creeping around mid-operation. The integrated pin locks it securely on the left side of the head, so I don’t have to keep readjusting after every few passes. Feels like a simple but well-thought-out fix for a common annoyance.

That little pin makes all the difference—finally, no more worrying about the spindle sleeve rotating during a cut. Took me maybe two minutes to swap out, and it fits perfectly on the left side of the head.

Installed this on the left side of the head and it locked the spindle sleeve in place perfectly—no more rotation while I'm milling. The built-in pin is a solid fix that really does the job.