聯軸器，軸，8-8-25 mm 間隙

The 8mm bore fit perfectly on my 3501 mill's Z-axis, replacing the old coupling that had developed play. It's a solid little piece of metal for the price.

Bolted this onto the 3501's Z-axis without any fuss—the 8mm bore on both ends lined up with the ball screw and motor shaft perfectly on the first try. It's a solid little part that does exactly what it's supposed to do, and it's reassuring to have the correct clearance fit rather than guessing with

The 25 mm length fit perfectly on the Z-axis ball screw of my 3501 mill, and the clearance bore meant no fiddly press-fit drama on install. Swapped out the old worn coupling and the axis is tracking smooth again, solidly made for the price.